Mechanical Seal

Code	Material
A	Antimony impregnated carbon graphite
A1	Antimony impregnated carbon graphite, resistant to blistering
A3	Antimony impregnated carbon graphite, dry-running
B	Resin impregnated carbon graphite
B6	Resin impregnated carbon graphite, FDA certified
B8	Resin impregnated carbon graphite, dry-running, FDA certified
C6	Electrographite, resistant to blistering, FDA certified
Q	Sintered silicon carbide (SiC)
Q1	Reaction bonded silicon carbide (SiC-Si)
Q5	Silicon carbide, diamond coated
R	CrNi cast iron
S	Special cast CrMo-steel (1.4136)
U	Tungsten carbide (Co-bonded)
U1	Tungsten carbide (Ni-bonded)
U2	Tungsten carbide (Co-bonded)
V	Al-Oxide ceramic (Al2O3; 99.5%)
V1	Al-Oxide ceramic (Al2O3; 96.0%)
Y	Glass filled PTFE

Code	Material
E	Ethylene-propylene elastomer (EPDM)
E3	Ethylene-propylene elastomer, FDA certified
E4	Ethylene-propylene elastomer, for hot water, FDA certified
K	Perfluorocarbon elastomer (FFKM)
K9	Perfluorocarbon elastomer, FDA certified
N	Chloroprene elastomer (CR)
P	Nitrile elastomer (NBR)
P3	Nitrile elastomer, FDA certified
S	Silicone elastomer (MVQ)
V	Fluorocarbon elastomer (FKM)
V3	Fluorocarbon elastomer, FDA certified
M	Fluorocarbon elastomer + PTFE-encapsulated (FKM/PTFE)
G	Graphite
T	PTFE Teflon (PTFE)

Code	Material
G	Stainless steel (1.4310)
M	Hastelloy C-4 (2.4610)

Code	Material
F	Stainless steel (1.4541)
G	Stainless steel (1.4571)
G1	Stainless steel URANUS (1.4539)
G2	Stainless steel "Duplex" (1.4462)
G4	Stainless steel "Super Duplex" (1.4410)
M	Hastelloy C-4 (2.4610)
M1	Monel (2.4360)
T2	Titanium (3.7035)

A3 EN 12756 Single mechanical seal · Unbalanced · Dependent of the direction of shaft rotation

Single mechanical seal
Unbalanced
Dependent of the direction of shaft rotation
With central tapered spring

Application

General purpose mechanical seal for use in centrifugal pumps and other equipment with rotating shaft handling water, oils, fuels, mild chemicals and liquids containing low quantity of abrasives.

Note

Type A3 seal with conical spring is dependent on the direction of the shaft rotation. Looking at the sliding face of the rotating seal ring, a righthanded shaft rotation needs a right handed spring (A3R - clockwise) and vice-versa (A3L - anticlockwise).

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.0 MPa
Temperature	t max	200 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, U, Q
Stationary ring	A, B, U2, Q, V, S
Secondary, flexible seals	E, P, V
Spring	G
Other metal parts	F, G

Legend

1. Stationary ring
2. O-ring
3. Rotating ring
4. O-ring
5. Spring

Dimensions (mm)

D1	D3	D4	D5	D6	D7	D8	L3*	L4	L5	L6
12	22	24	15	19	23	3	21.0	10.0	1.5	4
14	24	26	18	21	25	3	24.0	10.0	1.5	4
15	27	29	20	22	26	3	25.0	10.0	1.5	4
16	27	29	20	23	27	3	26.0	10.0	1.5	4
18	32	34	22	27	33	3	26.0	11.5	2.0	5
19	32	34	23	28	34	3	26.0	11.5	2.0	5
20	34	36	24	29	35	3	26.0	11.5	2.0	5
22	36	38	27	31	37	3	26.0	11.5	2.0	5
24	38	40	29	33	39	3	28.5	11.5	2.0	5
25	39	41	30	34	40	3	28.5	11.5	2.0	5
28	42	44	33	37	43	3	31.0	11.5	2.0	5
30	44	46	35	39	45	3	31.0	11.5	2.0	5
32	46	48	38	42	48	3	31.0	11.5	2.0	5
33	47	49	39	42	48	3	31.0	11.5	2.0	5
35	49	51	41	44	50	3	31.0	11.5	2.0	5
38	54	58	45	49	56	4	36.5	14.0	2.0	6
40	56	60	47	51	58	4	36.5	14.0	2.0	6
43	59	63	50	54	61	4	39.5	14.0	2.0	6
45	61	65	52	56	63	4	39.5	14.0	2.0	6
48	64	68	55	59	66	4	39.5	14.0	2.0	6
50	66	70	58	62	70	4	40.5	15.0	2.5	6
53	69	73	61	65	73	4	40.5	15.0	2.5	6
55	71	75	64	67	75	4	46.5	15.0	2.5	6
58	78	83	67	70	78	4	49.0	15.0	2.5	6
60	80	85	70	72	80	4	51.0	15.0	2.5	6
63	83	88	73	75	83	4	51.0	15.0	2.5	6
65	85	90	76	77	85	4	55.0	15.0	2.5	6
68	88	93	79	81	90	4	55.0	15.0	2.5	7
70	90	95	81	83	92	4	55.0	17.0	2.5	7
75	99	104	87	88	97	4	58.0	17.0	2.5	7
80	104	109	92	95	105	4	58.0	17.0	3.0	7

* tolerance of L3 dimension for d1 = 10 to 30 mm ± 0.5 mm; d1 = 32 to 50 mm ± 0.8 mm; d1 = 53 to 100 mm ± 1.0 mm

Other dimensions are available on request.

A1 Single mechanical seal · With rubber bellows · Unbalanced

Single mechanical seal
With rubber bellows
Unbalanced
Independent of the direction of shaft rotation
Central spring

Application

General purpose seal for use with water, oils, fuels and liquids containing low quantity of abrasive particles being handled in centrifugal pumps and other equipment actuated by rotating shafts.

Note

There is also A1G version with extended bellows available, adapted to the special conditions of installation.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.0 MPa
Temperature	t max	120 °C
Speed	v max	10 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, U, Q
Stationary ring	U2, Q, V, S
Secondary, flexible seals	E, P, S, V
Spring	G
Other metal parts	F, G

Legend

1. Stationary ring
2. O-ring
3. Rotating ring
4. Elastomer bellows
5. Spring
6. Front thrust ring
7. Rear thrust ring
8. L-shaped gasket

Dimensions (mm)

D1	D3	D4	D5	D6	D7	D13	L3*	L4	L5	L6	L22
10	22.5	24	20.5	17	21	24	14.5	6.5	1.5	4	8.5
12	24.5	26	22.5	19	23	26	15.0	6.5	1.5	4	8.5
13	28.5	30	26.5	21	25	28	17.0	6.5	1.5	4	8.5
14	28.5	30	26.5	21	25	28	17.0	6.5	1.5	4	8.5
15	28.5	30	26.5	23	26	30	17.0	6.5	1.5	4	8.5
16	28.5	30	26.5	23	27	32	17.0	6.5	1.5	4	8.5
18	32.0	33	29.0	27	33	35	19.5	7.5	2.0	5	9.5
19	35.0	38	31.0	28	34	35	20.0	7.5	2.0	5	9.5
20	36.0	38	33.0	29	35	38	21.5	7.5	2.0	5	9.5
22	36.0	38	33.0	31	37	38	21.5	7.5	2.0	5	9.5
24	41.5	44	38.0	33	39	42	22.5	7.5	2.0	5	9.5
25	41.5	44	38.0	34	40	42	23.0	7.5	2.0	5	9.5
26	41.5	44	38.0	34	40	42	23.0	7.5	2.0	5	9.5
28	47.0	50	43.0	37	43	46	26.5	8.5	2.0	5	9.5
30	47.0	50	44.0	39	45	48	26.5	8.5	2.0	5	9.5
32	50.5	55	46.0	42	48	54	27.5	8.5	2.0	5	9.5
33	50.5	55	46.0	42	48	54	27.5	8.5	2.0	5	9.5
35	55.0	59	50.0	44	50	54	28.5	8.5	2.0	5	9.5
38	58.5	61	53.0	49	56	57	30.0	8.5	2.0	6	12.0
40	60.5	64	55.0	51	58	60	30.0	8.5	2.0	6	12.0
43	63.0	67	58.0	54	61	64	30.0	8.5	2.0	6	12.0
45	68.0	70	60.0	56	63	64	30.0	8.5	2.0	6	12.0
48	71.5	74	63.0	59	66	66	30.5	8.5	2.0	6	12.0
50	72.5	77	65.0	62	70	70	30.5	11.0	2.5	6	12.5
53	78.0	81	70.0	65	73	73	33.0	11.0	2.5	6	12.5
55	78.5	83	72.0	67	75	75	35.0	11.0	2.5	6	12.5
58	83.5	88	75.0	70	78	80	37.0	11.0	2.5	6	12.5
60	86.5	91	79.0	72	80	80	38.0	11.0	2.5	6	12.5
65	93.0	96	84.0	77	85	90	40.0	11.0	2.5	6	12.5
68	96.0	100	88.0	81	90	90	40.0	11.0	2.5	7	12.5
70	98.0	103	90.0	83	92	95	40.0	11.0	2.5	7	14.5
75	103.0	110	95.0	88	97	100	40.0	11.0	2.5	7	14.5
80	110.0	116	100.0	95	105	105	40.0	14.0	3.0	7	16.0
85	116.0	124	107.0	100	110	-	41.0	14.0	3.0	7	16.0
95	132.0	136	119.0	110	120	-	46.0	14.0	3.0	7	16.0
100	137.0	140	124.0	115	125	-	47.0	14.0	3.0	7	16.0

* tolerance of L3 dimension for d1 = 10 to 30 mm ± 0.5 mm; d1 = 32 to 50 mm ± 0.8 mm; d1 = 53 to 100 mm ± 1.0 mm

Other dimensions are available on request.

A4 EN 12756 Single mechanical seal · Balanced · Central, non-clogging coil spring

Single mechanical seal
Balanced
Central, non-clogging coil spring
Dual-direction of shaft rotation
Elastomer bellows protected against twisting
Easy and quick installation
Installation acc. to DIN 24960, EN 12756 and ISO 3069

Application

Universal, general purpose mechanical seal for water/water based solutions, oils, fuels and other fluids even with some content of abrasives and it is suitable for various operating conditions. Design intended for centrifugal pumps and other rotary equipment in industrial applications (food processing, water systems, wastewater treatment, petrochemical processing, pulp and paper).

Note

The A41 version of the A4 seal is available, sized to direct application in the place of A1 seal (L3 dimension for particular size is the same as for the A1 seal).

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa *
Temperature	t max	150 °C
Speed	v max	15 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	U2, Q, V, S
Secondary, flexible seals	E, P, V
Spring	G
Other metal parts	F, G

Legend

1. Stationary ring
2. O-ring
3. Rotating ring
4. Elastomer bellows
5. Spring
6. Front thrust ring
7. Rear thrust ring

Dimensions (mm)

D1	D3	D4	D6	D7	L3*	L4
16	26	28	23	27	26.0	10.0
18	32	34	27	33	26.0	11.5
20	34	36	29	35	26.0	11.5
22	36	38	31	37	26.0	11.5
24	38	40	33	39	28.5	11.5
25	39	41	34	40	28.5	11.5
26	40	42	34	40	28.5	11.5
28	42	44	37	43	31.0	11.5
30	44	46	39	45	31.0	11.5
32	46	48	42	48	31.0	11.5
33	47	49	42	48	31.0	11.5
35	49	51	44	50	31.0	11.5
38	54	58	49	56	31.0	14.0
40	56	60	51	58	31.0	14.0
43	59	63	54	61	31.0	14.0
45	61	65	56	63	31.0	14.0
48	64	68	59	66	31.0	14.0
50	66	70	62	70	32.5	15.0
53	69	73	65	73	32.5	15.0
55	71	75	67	75	32.5	15.0
58	78	83	70	78	37.5	15.0
60	80	85	72	80	37.5	15.0
63	83	88	75	83	37.5	15.0
65	85	90	77	85	37.5	15.0
68	88	93	81	90	37.5	15.0
70	90	95	83	92	43.0	17.0
75	99	104	88	97	43.0	17.0
80	104	109	95	105	43.0	17.0

* - Maximum pressure depends on the diameter of mechanical seal.

* tolerance of L3 dimension for d1 = 10 to 30 mm ± 0.5 mm; d1 = 32 to 80 mm ± 1.0 mm

Other dimensions are available on request.

A10, A11 Single, outside mounted mechanical seal · With PTFE bellows · Balanced

Single, outside mounted mechanical seal
With PTFE bellows
Balanced
Dual directional
Multi-spring

Application

Type A10/A11 mechanical seals are designed for use in extremely corrosive environments (A10 only for non-abrasive applications). All metal components, including springs are isolated from the sealed, aggressive medium.

Note

Type A10/A11 seals incorporate visual wear indicators of rotating ring (pos. 3,3’) in the spring housing (pos. 5):

green line - means initial seal operating adjustment,
red line - means that the rotating ring - bellows needs service.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	0.9 MPa
Temperature	t max	120 °C
Speed	v max	8 m/s

Materials (codes as listed above)

Part	Code A10	Code A11
Rotating ring	Y	B, A
Stationary ring	Q, V	—
Secondary, flexible seals	T1	—
Spring	M	—
Other metal parts	G	—

Legend

1. Stationary ring
2. Flat gasket
3,3’. Rotating ring **
4. Springs
5. Spring housing
6. Thrust plate
7. Set screw
8. Bellows housing
9. Thrust ring *

* - It is recommended to block any possible movement of the rotating unit by a thrust ring in case of sealed pressure exceeding 0.4 MPa.

** - version A11 is available with rotating ring with carbon graphite wear resistant insert for abrasive applications.

Dimensions (mm)

D1	D3	D19	D21	L3	L4	L23
20	57	39.7	51	31	17.6	13.8
22	57	39.7	51	31	17.6	13.8
24	61	42.9	54	33	17.6	13.8
25	61	42.9	54	33	17.6	14.3
28	67	50.8	65	36	27.0	20.5
30	70	54.0	68	37	27.0	20.5
32	70	54.0	68	37	27.0	20.5
33	73	57.2	71	38	27.0	20.5
35	73	57.2	71	38	27.0	20.5
38	76	63.5	78	38	27.0	20.5
40	80	66.7	81	40	27.0	20.5
43	83	69.9	84	40	27.0	20.5
45	83	69.9	84	40	27.0	20.5
48	89	79.4	97	43	33.3	25.3
50	89	79.4	97	43	33.3	25.3
53	103	82.6	100	53	33.3	25.8
55	107	85.8	103	53	33.3	25.8
58	110	88.9	106	53	33.3	25.8
60	110	88.9	106	53	33.3	25.8
63	113	92.1	110	53	33.3	25.8
65	116	95.3	113	53	33.3	25.8
68	118	98.5	116	53	33.3	25.8
70	118	98.5	116	53	33.3	25.8
75	126	103.2	121	53	34.3	26.3
80	150	114.3	132	73	34.3	26.3

Other dimensions are available on request.

A12, A13, B12 Single mechanical seal · Balanced · Outside mounted

Single mechanical seal
Balanced
Outside mounted
Independent of the direction of shaft rotation
Multi-spring
PTFE bellows

Application

The A12, A13 and B12 mechanical seals are intended for operating with extremely aggressive chemical compounds (for the A13 and B12 seals, presence of small abrasive particles is permitted). Mechanical seals are intended for centrifugal pumps and other equipments with rotating shafts.

Note

The B12 version is intended for operating with aggressive chemical media of temperature above 80 °C.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.2 MPa
Temperature	t max	80 °C
Speed	v max	10 m/s

Materials (codes as listed above)

Part	Code A12	Code A13	Code B12
Rotating ring	V, Q	—	—
Stationary ring	Y	B	B, Q
Secondary, flexible seals	T1	—	T1, V, K, E
Spring	M	—	—
Other metal parts	-	—	G, T2

Legend A12, A13

1. Rotating ring
2. A12/A13 bellows*
3. Sleeve
4. Cage
5. Springs
6. Driver
7. Flat gaskets

Legend B12

1. Rotating ring
2. Stationary ring
3. O-ring
4. Seal housing
5. Driver
6. Spring
7. Flat gaskets
8. Flat gasket

* - The A13 version with carbon insert is available. It is recommended for abrasive media.

Dimensions (mm)

D1	D2	D3	D4	D5	D6	D7	L
30	32	78	22	56	60.1	54	38
35	37	83	22	56	65.1	60	38
40	42	88	32	66	70.1	65	41
45	47	94	32	70	75.1	70	41
50	52	100	40	76	80.1	75	41
60	62	110	37	86	90.1	85	41
70	72	120	60	97	100.1	95	41
80	82	130	70	107	110.1	105	41

Other dimensions are available on request.

US EN 12756 Single mechanical seal · Balanced · Wave spring

Single mechanical seal
Balanced
Wave spring
Dual directional
Spring isolated from medium

Application

US is a universal mechanical seal with a wide range of applications. It is designed for operation with cold and hot water, oils, fuels, poorly aggressive chemicals and other liquids containing solid particles. Used mainly in centrifugal pumps in sewage treatment plants, pulp & paper, chemical, petrochemical, food processing and sugar industries.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa
Temperature	t max	200 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, U, Q
Stationary ring	U2, Q
Secondary, flexible seals	E, K, V
Spring	G, M
Other metal parts	G, M

Legend

1. Stationary ring
2. O-ring
3. Rotating ring
4. Rotating ring housing
5. Wave spring
6. O-ring
7. O-ring
8. Seal housing
9. Set screw

Dimensions (mm)

D1	D3	D4	D6	D7	D8	L3*	L4	L5	L6
18	32	34	27	33	3	26.0	11.5	2.0	5
20	34	36	29	35	3	26.0	11.5	2.0	5
22	36	38	31	37	3	26.0	11.5	2.0	5
24	38	40	33	39	3	28.5	11.5	2.0	5
25	39	41	34	40	3	28.5	11.5	2.0	5
26	40	42	34	40	3	28.5	11.5	2.0	5
28	42	44	37	43	3	31.0	11.5	2.0	5
30	44	46	39	45	3	31.0	11.5	2.0	5
32	46	48	42	48	3	31.0	11.5	2.0	5
33	47	49	42	48	3	31.0	11.5	2.0	5
35	49	51	44	50	3	31.0	11.5	2.0	5
38	54	58	49	56	4	31.0	14.0	2.0	6
40	56	60	51	58	4	31.0	14.0	2.0	6
43	59	63	54	61	4	31.0	14.0	2.0	6
45	61	65	56	63	4	31.0	14.0	2.0	6
48	64	68	59	66	4	31.0	14.0	2.0	6
50	66	70	62	70	4	32.5	15.0	2.5	6
53	69	73	65	73	4	32.5	15.0	2.5	6
55	71	75	67	75	4	32.5	15.0	2.5	6
58	78	83	70	78	4	37.5	15.0	2.5	6
60	80	85	72	80	4	37.5	15.0	2.5	6
63	83	88	75	83	4	37.5	15.0	2.5	6
65	85	90	77	85	4	37.5	15.0	2.5	6
68	88	93	81	90	4	37.5	15.0	2.5	7
70	90	95	83	92	4	43.0	17.0	2.5	7
75	99	104	88	97	4	43.0	17.0	2.5	7
80	104	109	95	105	4	43.0	17.0	3.0	7
85	109	114	100	110	4	43.0	17.0	3.0	7
90	114	119	105	115	4	48.0	17.0	3.0	7
95	119	124	110	120	4	48.0	17.0	3.0	7
100	124	129	115	125	4	48.0	17.0	3.0	7

* tolerance of L3 dimension is ± 0.5 mm

Other dimensions are available on request.

US2 EN 12756 Single mechanical seal · Balanced · Dual directional

Single mechanical seal
Balanced
Dual directional
Multi-spring

Application

This mechanical seal is designed for application in centrifugal pumps handling water, oils, poorly aggressive chemicals, mud and fluids containing solids and it is used mostly in petrochemical, chemical, pulp & paper, sugar industries and in wastewater treatment plants.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa
Temperature	t max	200 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	U2, Q, V, S
Secondary, flexible seals	E, P, K, V
Spring	M
Other metal parts	G, M

Legend

1. Stationary ring
2. O-ring
3. Rotating ring
4. O-ring
5. Seal housing
6. Springs
7. Drive pin
8. O-ring
9. Set screw

Dimensions (mm)

D1	D3	D4	D6	D7	L3*	L4	L8
24	38	40	33	39	38.5	11.5	18.0
25	39	41	34	40	38.5	11.5	18.0
28	42	44	37	43	38.5	11.5	18.0
30	44	46	39	45	38.5	11.5	18.0
32	46	48	42	48	38.5	11.5	18.0
33	47	49	42	48	38.5	11.5	18.0
35	49	51	44	50	38.5	11.5	18.0
38	54	58	49	56	41.0	14.0	20.5
40	56	60	51	58	41.0	14.0	20.5
43	59	63	54	61	42.5	14.0	20.5
45	61	65	56	63	42.5	14.0	20.5
48	64	68	59	66	42.5	14.0	20.5
50	66	70	62	70	45.0	15.0	21.5
53	69	73	65	73	45.0	15.0	21.5
55	71	75	67	75	45.0	15.0	21.5
58	78	83	70	78	50.0	15.0	21.5
60	80	85	72	80	50.0	15.0	21.5
63	83	88	75	83	50.0	15.0	21.5
65	85	90	77	85	50.0	15.0	21.5
68	88	93	81	90	50.0	15.0	21.5
70	90	95	83	92	57.0	17.0	23.0
75	99	104	88	97	57.0	17.0	23.0
80	104	109	95	105	62.0	17.0	23.2
85	109	114	100	110	62.0	17.0	23.2
90	114	119	105	115	62.0	17.0	23.2
95	119	124	110	120	62.0	17.0	23.2
100	124	129	115	125	62.0	17.0	23.2

* tolerance of L3 dimension is ± 0.5 mm

Other dimensions are available on request.

V, VT, VS EN 12756 Single mechanical seal · Unbalanced · Dual directional

Single mechanical seal
Unbalanced
Dual directional
Multi-spring (version V, VT)
Wave spring (version VS)
PTFE wedge gasket (version VT)

Application

General purpose seals type V, VS, VT are recommended for clean mediums. They are designed for use with petroleum products, poorly aggressive chemicals, and refrigerants in centrifugal pumps and other equipment with rotating shafts.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.0 MPa
Temperature	t max	200 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	Q, V
Secondary, flexible seals	P, V, E, K
Other metal parts	G, M

Legend

1. Stationary ring
2. O-ring
3. Rotating ring
4. O-ring
4a. PTFE wedge gasket
5. Springs
5a. Wave spring (version VS)
6. Seal housing
7. Set screw
8. Thrust plate
9. Snap spring ring

(version VT)

Dimensions (mm)

D1	D3	D4	D6	D7	D8	L3*	L4	L5	L6
16	30	33	23	27	3	26.0	10.0	2.0	5
18	32	34	27	33	3	26.0	11.5	2.0	5
20	34	36	29	35	3	26.0	11.5	2.0	5
22	36	38	31	37	3	26.0	11.5	2.0	5
24	38	40	33	39	3	28.5	11.5	2.0	5
25	39	41	34	40	3	28.5	11.5	2.0	5
26	40	42	34	40	3	28.5	11.5	2.0	5
28	42	44	37	43	3	31.0	11.5	2.0	5
30	44	46	39	45	3	31.0	11.5	2.0	5
32	46	48	42	48	3	31.0	11.5	2.0	5
33	47	49	42	48	3	31.0	11.5	2.0	5
35	49	51	44	50	3	31.0	11.5	2.0	5
38	54	58	49	56	4	31.0	14.0	2.0	6
40	56	60	51	58	4	31.0	14.0	2.0	6
43	59	63	54	61	4	31.0	14.0	2.0	6
45	61	65	56	63	4	31.0	14.0	2.0	6
48	64	68	59	66	4	31.0	14.0	2.0	6
50	66	70	62	70	4	32.5	15.0	2.5	6
53	69	73	65	73	4	32.5	15.0	2.5	6
55	71	75	67	75	4	32.5	15.0	2.5	6
58	78	83	70	78	4	37.5	15.0	2.5	6
60	80	85	72	80	4	37.5	15.0	2.5	6
63	83	88	75	83	4	37.5	15.0	2.5	6
65	85	90	77	85	4	37.5	15.0	2.5	6
68	88	93	81	90	4	37.5	15.0	2.5	7
70	90	95	83	92	4	43.0	17.0	2.5	7
75	99	104	88	97	4	43.0	17.0	2.5	7
80	104	109	95	105	4	43.0	17.0	3.0	7
85	109	114	100	110	4	43.0	17.0	3.0	7
90	114	119	105	115	4	48.0	17.0	3.0	7
95	119	124	110	120	4	48.0	17.0	3.0	7
100	124	129	115	125	4	48.0	17.0	3.0	7
105	130	135	120	130	4	48.0	20.0	3.0	7
110	135	140	125	135	4	48.0	20.0	3.0	7
115	140	145	130	140	4	48.0	20.0	3.0	7
120	145	150	135	145	4	48.0	20.0	3.0	7
125	150	155	140	150	4	48.0	20.0	3.0	7

* tolerance of L3 dimension is ± 0.5 mm

Other dimensions are available on request.

VSK Single mechanical seal · Unbalanced · Dual directional

Single mechanical seal
Unbalanced
Dual directional
Wave spring

Application

General purpose VSK seal is recommended for clean mediums and with low content of abrasives. It is designed for use with petrochemical products, poorly aggressive chemicals, and refrigerants in centrifugal pumps and other equipment with rotating shafts.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.0 MPa
Temperature	t max	200 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	U2, Q, V, S
Secondary, flexible seals	E, K, V, M
Spring	G
Other metal parts	G

Legend

1. Stationary ring
2. O-ring
3. Rotating ring
4. O-ring
5. Wave spring
6. Seal housing
7. Set screw
8. Thrust plate
9. Snap spring ring

Dimensions (mm)

D1	D3	D4	D6	D7	D8	L3	L4	L5	L6
10	20	22	17	21	3	18	10.0	1.5	4
12	22	24	19	23	3	18	10.0	1.5	4
14	24	26	21	25	3	18	10.0	1.5	4
16	26	28	23	27	3	18	10.0	1.5	4
18	29	34	27	33	3	19	11.5	2.0	5
20	31	36	29	35	3	19	11.5	2.0	5
22	33	38	31	37	3	19	11.5	2.0	5
24	36	40	33	39	3	21	11.5	2.0	5
25	39	41	34	40	3	22	11.5	2.0	5
26	40	42	34	40	3	22	11.5	2.0	5
28	42	44	37	43	3	22	11.5	2.0	5
30	44	46	39	45	3	23	11.5	2.0	5
32	46	48	42	48	3	23	11.5	2.0	5
33	47	49	42	48	3	23	11.5	2.0	5
35	49	51	44	50	3	23	11.5	2.0	5
38	54	58	49	56	4	24	14.0	2.0	6
40	56	60	51	58	4	25	14.0	2.0	6
43	59	63	54	61	4	25	14.0	2.0	6
45	61	65	56	63	4	25	14.0	2.0	6
48	64	68	59	66	4	25	14.0	2.0	6
50	66	70	62	70	4	25	15.0	2.5	6
53	69	73	65	73	4	25	15.0	2.5	6
55	71	75	67	75	4	25	15.0	2.5	6
58	78	83	70	78	4	27	15.0	2.5	6
60	80	85	72	80	4	27	15.0	2.5	6
63	83	88	75	83	4	30	15.0	2.5	6
65	85	90	77	85	4	30	15.0	2.5	6

* tolerance of L3 dimension is ± 0.5 mm

Other dimensions are available on request.

VB, VBT EN 12756 Single mechanical seal · Balanced · Independent of the direction of shaft rotation

Single mechanical seal
Balanced
Independent of the direction of shaft rotation
Multi-spring

Application

General purpose seal designed for use with petroleum products, poorly aggressive chemicals, and refrigerants in centrifugal pumps and other equipment with rotating shafts.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.5 MPa to 5.0 MPa *
Temperature	t max	200 °C
Speed	v max	25 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	U2, Q, V, S
Secondary, flexible seals	E, K, V, M, T
Spring	M
Other metal parts	G

Legend

1. Stationary ring
2. O-ring
3. Rotating ring
4. O-ring
4a. PTFE wedge gasket
5. Springs
6. Seal housing
7. Set screw
8. Thrust plate
9. Snap spring ring
10. Anti-extrusion support ring

(version VBT)

Dimensions (mm)

D1	D2 *	D3	D4	D6	D7	D8	L3 **	L4	L5	L6	L10
18	22	36	38	27	33	3	33.5	11.5	2.0	5	8.5
20	24	38	40	29	35	3	33.5	11.5	2.0	5	8.5
22	26	40	42	31	37	3	33.5	11.5	2.0	5	8.5
24	28	42	44	33	39	3	36.0	11.5	2.0	5	8.5
25	30	44	46	34	40	3	36.0	11.5	2.0	5	8.5
28	33	47	49	37	43	3	38.5	11.5	2.0	5	8.5
30	35	49	51	39	45	3	38.5	11.5	2.0	5	8.5
32	38	54	58	42	48	3	38.5	11.5	2.0	5	8.5
33	38	54	58	42	48	3	38.5	11.5	2.0	5	8.5
35	40	56	60	44	50	3	38.5	11.5	2.0	5	8.5
38	43	59	63	49	56	4	38.5	14.0	2.0	6	9.0
40	45	61	65	51	58	4	38.5	14.0	2.0	6	9.0
43	48	64	68	54	61	4	38.5	14.0	2.0	6	9.0
45	50	66	70	56	63	4	38.5	14.0	2.0	6	9.0
48	53	69	73	59	66	4	38.5	14.0	2.0	6	9.0
50	55	71	75	62	70	4	42.5	15.0	2.5	6	10.0
53	58	78	83	65	73	4	42.5	15.0	2.5	6	10.0
55	60	80	85	67	75	4	42.5	15.0	2.5	6	10.0
58	63	83	88	70	78	4	47.5	15.0	2.5	6	10.0
60	65	85	90	72	80	4	47.5	15.0	2.5	6	10.0
63	68	88	93	75	83	4	47.5	15.0	2.5	6	10.0
65	70	90	95	77	85	4	47.5	15.0	2.5	6	10.0
70	75	99	104	83	92	4	53.0	17.0	2.5	7	11.0
75	80	104	109	88	97	4	53.0	17.0	2.5	7	11.0
80	85	109	114	95	105	4	53.0	17.0	3.0	7	11.0
85	90	114	119	100	110	4	58.0	17.0	3.0	7	11.0
90	95	119	124	105	115	4	58.0	17.0	3.0	7	11.0
95	100	124	129	110	120	4	58.0	17.0	3.0	7	11.0
100	105	130	135	115	125	4	58.0	17.0	3.0	7	11.0
105	110	135	140	120	130	4	55.0	20.0	3.0	7	8.0
110	115	140	145	125	135	4	55.0	20.0	3.0	7	8.0
115	120	145	150	130	140	4	55.0	20.0	3.0	7	8.0
120	125	150	155	135	145	4	55.0	20.0	3.0	7	8.0
125	130	155	160	140	150	4	55.0	20.0	3.0	7	8.0

* - maximum pressure depends on the diameter of mechanical seal: 2.5 MPa - dia 100 mm, 5.0 MPa - dia 18 mm.

** tolerance of L3 dimension is ± 0.5 mm

Other dimensions are available on request.

VD EN 12756 Double mechanical seal: · Unbalanced · Multi-spring

Double mechanical seal:
Unbalanced
Multi-spring
Independent of the direction of shaft rotation
(unless pumping screw is applied*)

Application

Double mechanical seals are recommended for liquids which do not form lubricating films and for toxic, flammable and explosive media handled by centrifugal pumps and other equipment with rotating shaft. The use of barrier or buffer fluid system assures reliable run of the seal providing lubrication, cooling and removal of deposits from sliding faces area.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.0 MPa
Temperature	t max	200 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	U2, Q, V, S
Secondary, flexible seals	E, K, V
Spring	M
Other metal parts	G

Legend

1. Stationary ring
2. Stationary ring
3. O-ring
4. O-ring
5. Rotating ring
6. Rotating ring
7. O-ring
8. O-ring
9. Spring
10. Seal housing
11. Set screw
12. Thrust plate
13. Snap spring ring
14. Pumping screw (option)*

Dimensions (mm)

D1	D3	D4	D6	D7	D8	DS*	L1	L3**	L4	L5	L6	L11	Mx
18	32	34	27	33	3	38	63.0	40.0	11.5	2.0	5	16.5	M6
20	34	36	29	35	3	40	63.0	40.0	11.5	2.0	5	16.5	M6
22	36	38	31	37	3	42	63.0	40.0	11.5	2.0	5	16.5	M6
24	38	40	33	39	3	44	67.0	44.0	11.5	2.0	5	17.5	M6
25	39	41	34	40	3	45	67.0	44.0	11.5	2.0	5	17.5	M6
28	42	44	37	43	3	48	69.0	46.0	11.5	2.0	5	18.0	M6
30	44	46	39	45	3	50	69.0	46.0	11.5	2.0	5	18.0	M6
32	46	48	42	48	3	52	69.0	46.0	11.5	2.0	5	18.0	M6
33	47	49	42	48	3	53	69.0	46.0	11.5	2.0	5	18.0	M6
35	49	51	44	50	3	55	69.0	46.0	11.5	2.0	5	18.0	M6
38	54	58	49	56	4	61	78.0	50.0	14.0	2.0	6	20.5	M6
40	56	60	51	58	4	63	78.0	50.0	14.0	2.0	6	20.5	M6
43	59	63	54	61	4	66	78.0	50.0	14.0	2.0	6	20.5	M6
45	61	65	56	63	4	68	78.0	50.0	14.0	2.0	6	20.5	M6
48	64	68	59	66	4	71	78.0	50.0	14.0	2.0	6	20.5	M6
50	66	70	62	70	4	73	82.0	52.0	15.0	2.5	6	21.0	M6
53	69	73	65	73	4	76	82.0	52.0	15.0	2.5	6	21.0	M6
55	71	75	67	75	4	78	82.0	52.0	15.0	2.5	6	21.0	M6
58	78	83	70	78	4	85	90.0	60.0	15.0	2.5	6	26.0	M6
60	80	85	72	80	4	87	90.0	60.0	15.0	2.5	6	26.0	M6
63	83	88	75	83	4	90	90.0	60.0	15.0	2.5	6	26.0	M6
65	85	90	77	85	4	92	90.0	60.0	15.0	2.5	6	26.0	M6
68	88	93	81	90	4	95	90.0	60.0	15.0	2.5	7	26.0	M6
70	90	95	83	92	4	97	94.0	60.0	17.0	2.5	7	26.0	M6
75	99	104	88	97	4	106	95.5	61.5	17.0	2.5	7	25.5	M8
80	104	109	95	105	4	111	95.5	61.5	17.0	3.0	7	25.5	M8
85	109	114	100	110	4	116	95.5	61.5	17.0	3.0	7	25.5	M8
90	114	119	105	115	4	123	95.5	61.5	17.0	3.0	7	25.5	M8
95	119	124	110	120	4	128	95.5	61.5	17.0	3.0	7	25.5	M8
100	124	129	115	125	4	133	95.5	61.5	17.0	3.0	7	25.5	M8
105	130	135	120	130	4	139	110.0	70.0	20.0	3.0	7	30.5	M8
110	135	140	125	135	4	144	110.0	70.0	20.0	3.0	7	30.5	M8
115	140	145	130	140	4	149	110.0	70.0	20.0	3.0	7	30.5	M8
120	145	150	135	145	4	154	110.0	70.0	20.0	3.0	7	30.5	M8
125	150	155	140	150	4	159	110.0	70.0	20.0	3.0	7	30.5	M8

** tolerance of L3 dimension is ± 0.5 mm

Other dimensions are available on request.

E1 Single mechanical seal · With metal bellows · Balanced

Single mechanical seal
With metal bellows
Balanced
Dual directional

Application

Type E1 mechanical seals are intended for use in petrochemical, chemical, pharmaceutical and food processing industries, for process pumps and other equipment with rotating shaft. Recommended for high temperature mediums e.g. hot oils, pitch, tar and other hydrocarbons, fuels, liquid gases and other mediums with low content of abrasives.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.0 MPa
Temperature	t max	-50 °C to 260 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	Q, V
Secondary, flexible seals	P, E, K, V
Metal bellows	G, M
Other metal parts	G, M

Legend

1. Stationary ring
2. O-ring
3. Rotating ring
4. Seal housing and metal bellows
5. O-ring
6. Set screw

Dimensions (mm)

D1	D3	D4	D6	D7	D8	L3	L4	L5	L6	L7
22	37.0	38	31	37	3	27.5	11.5	2	5	9
25	37.0	38	34	40	3	30.0	11.5	2	5	9
28	42.8	44	37	43	3	32.5	11.5	2	5	9
30	43.0	46	39	45	3	32.5	11.5	2	5	9
32	43.0	46	42	48	3	32.5	11.5	2	5	9
33	49.2	51	42	48	3	32.5	11.5	2	5	9
35	49.2	51	44	50	3	32.5	11.5	2	5	9
38	49.4	54	49	56	4	34.0	14	2	6	9
40	55.5	60	51	58	4	34.0	14	2	6	9
43	58.7	63	54	61	4	34.0	14	2	6	9
45	58.7	63	56	63	4	34.0	14	2	6	9
50	65.1	70	62	70	4	34.5	15	2.5	6	9
55	71.4	75	67	75	4	34.5	15	2.5	6	9
60	74.6	80	72	80	4	39.5	15	2.5	6	9
65	84.1	90	77	85	4	39.5	15	2.5	6	9
70	87.3	93	83	92	4	44.7	17	2.5	7	9
75	92.1	98	88	97	4	44.7	17	2.5	7	9
80	98.4	104	95	105	4	44.3	17	3	7	9
85	104.8	110	100	110	4	44.3	17	3	7	9
90	108.0	113	105	115	4	49.3	17	3	7	9
95	114.3	120	110	120	4	49.3	17	3	7	9
100	120.7	126	115	125	4	49.3	17	3	7	9

Other dimensions are available on request.

E2 Single mechanical seal · With welded metal bellows · Balanced

Single mechanical seal
With welded metal bellows
Balanced
Dual directional

Application

This mechanical seal is intended for use in petrochemical, chemical and pharmaceutical industries, for process pumps and other equipment with rotating shaft. Recommended for high temperature mediums e.g. hot oils, pitch, tar and other hydrocarbons, fuels, liquid gases and other mediums with low content of abrasives.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa
Temperature	t max	-20 °C to 400 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	Q
Secondary, flexible seals	G
Welded bellows	G, M
Other metal parts	T, M

Legend

1. Stationary ring
2. Sealing ring
3. Rotating ring
4. Seal housing with welded metal bellows
5. Seal housing
6. Fixing ring
7. Set screw
8. Hex screw

Dimensions (mm)

D1	D3	D4	D26	D27	L3	L4	L7	L8
25	40	42	35.16	41.28	42.8	6.6	3.2	11.1
28	43	45	38.33	44.45	39.7	6.6	3.2	11.1
30	46	48	41.50	47.62	42.8	6.6	3.2	11.1
32	46	48	44.68	50.80	42.8	6.6	3.2	11.1
33	49	51	44.68	50.80	44.5	6.6	3.2	11.1
35	49	51	44.68	50.80	44.5	6.6	3.2	11.1
38	55	57	47.85	53.98	44.5	6.6	4.2	11.1
40	58.5	63	54.20	60.32	44.5	8.0	4.2	12.7
43	61.5	66	57.38	63.50	44.5	8.0	4.2	12.7
45	61.5	66	60.55	66.68	44.5	8.0	4.2	12.7
48	65	69	63.83	69.85	44.5	8.0	4.2	12.7
50	68	72	63.83	69.85	44.5	8.0	4.2	12.7
53	71	75	70.08	76.20	44.5	8.8	4.2	14.3
55	74.5	79	73.26	79.38	47.6	8.8	4.2	14.3
60	77.5	83	76.43	82.55	47.6	8.8	4.2	14.3
63	81	86	79.60	85.72	47.6	9.6	4.2	15.9
65	84	89	79.60	85.72	47.6	9.6	4.2	15.9
70	87.5	93	82.78	88.90	47.6	9.6	4.2	15.9
75	95.5	101	88.98	98.42	47.6	11.4	4.8	15.9
80	98.5	104	95.33	104.78	47.6	11.4	4.8	15.9
85	105	110	98.50	107.95	47.6	11.4	4.8	15.9
90	108	113	104.85	114.30	47.6	12.5	4.8	17.5
95	114.5	120	108.15	117.48	47.6	12.5	4.8	17.5
100	121	126	114.38	123.82	47.6	12.5	4.8	17.5

* tolerance of L3 dimension is ± 0.5 mm

Other dimensions are available on request.

W Single mechanical seal · Outside mounted · Balanced

Single mechanical seal
Outside mounted
Balanced
Multispring
Dual directional

Application

This outside mounted mechanical seal is designed for poorly aggressive chemical substances and liquids containing solid particles. Used mostly in centrifugal pumps in purification plants, pulp & paper, chemical and sugar industries.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.0 MPa
Temperature	t max	100 °C
Speed	v max	10 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	B, U2, Q
Stationary ring	U2, Q, V, S
Secondary, flexible seals	E, P, K, V
Spring	M
Other metal parts	G

Legend

1. Stationary ring
2. Flat gasket
3. Rotating ring
4. O-ring
5. Seal housing
6. O-ring
7. Drive pin
8. Springs
9. Set screw

Dimensions (mm)

D1	D3	D19 (hole)	D21	L3*	L23	L24	L25
22	44	39.7	51	34	17.6	13.8	10
24	48	42.9	54	34	17.6	13.8	10
25	48	42.9	54	34	17.6	14.3	11
28	52	50.8	65	34	27	20.5	14
30	55	54	68	34	27	20.5	14
32	55	54	68	34	27	20.5	14
33	58	57.2	71	34	27	20.5	14
35	59	57.2	71	34	27	20.5	14
38	63	63.5	78	34	27	20.5	14
40	64	66.7	81	34	27	20.5	14
43	68	69.9	84	34	27	20.5	14
45	70	69.9	84	43	27	20.5	14
48	77	79.4	97	43	33.3	25.3	17.3
50	77	79.4	97	43	33.3	25.3	17.3
53	80	82.6	100	43	33.3	25.8	18.3
55	80	85.8	103	43	33.3	25.8	18.3
58	84	88.9	106	43	33.3	25.8	18.3
60	86	88.9	106	43	33.3	25.8	18.3
63	88	92.1	110	43	33.3	25.8	18.3
65	91	95.3	113	43	33.3	25.8	18.3
68	93	98.5	116	43	33.3	25.8	18.3
70	98	98.5	116	43	33.3	25.8	18.3
75	105	103.2	121	43	33.3	25.8	18.3
80	111	114.3	132	43	33.3	25.8	18.3
85	116	120.7	138	43	33.3	25.8	18.3
90	121	127	144	43	33.3	25.8	18.3

* tolerance of L3 dimension is ± 0.5 mm

Other dimensions are available on request.

UST Single mechanical seal · Compact (cartridge) design · Balanced

Single mechanical seal
Compact (cartridge) design
Balanced
Dual directional
Multispring

Application

This general purpose UST mechanical seal is designed for a wide range of applications in centrifugal pumps handling hot and cold water, oils, fuels, poorly aggressive chemicals and fluids with low content of abrasives.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa
Temperature	t max	-50°C to 200°C
Speed	v max	12.5 m/s

Materials (codes as listed above)

Part	Code
Stationary ring	Q, U
Rotating ring	A, B, Q, U
Secondary, flexible seals	P, V, E, K
Spring	M
Other metal parts	G

Legend

1. Stationary ring
2. Rotating ring
3. Sleeve
4. Cover
5. Clamp ring
6. Retaining ring
7. Distance plate
8. Hex screw
9. Set screw
10. Springs
11. Flat gasket
12. O-ring
13. O-ring
14. O-ring

Dimensions (mm)

D1	D3	D4min	D4max	Dm	Dz	L1	L2	L3	S	F
24	39.2	40	48	54	102	25.0	20.0	58	14	1/8
25	40.2	41	48	54	102	25.0	20.0	58	14	1/8
28	43.2	44	52	58	105	25.0	20.0	58	14	1/8
30	45.2	46	54	60	108	25.0	20.0	58	14	1/8
32	47.2	48	54	60	108	25.0	20.0	58	14	1/8
33	48.2	49	54	60	108	25.0	20.0	58	14	1/8
35	50.2	51	59	65	108	25.0	20.0	58	14	1/8
38	55.0	56	64	70	114	25.0	20.0	59	14	1/8
40	57.0	58	64	70	114	25.0	20.0	59	14	1/8
43	60.0	61	67	73	120	25.0	20.0	59	14	1/8
45	62.0	63	70	76	127	25.0	20.0	59	14	1/8
48	65.0	66	73	79	133	25.0	20.0	59	14	1/8
50	67.0	68	73	79	133	25.0	20.0	59	14	1/8
53	70.0	71	76	83	140	26.0	20.0	60	18	1/8
55	72.5	74.5	80	86	146	26.0	20.0	60	18	1/8
58	75.0	77	86	92	165	26.0	20.0	60	22	1/8
60	77.0	79	86	92	165	27.0	20.0	61	22	1/8
63	81.0	83	102	108	178	25.5	25.0	64	22	1/4
65	86.0	88	102	108	178	25.5	25.0	64	22	1/4
68	90.0	92	102	108	178	25.5	25.0	64	22	1/4
70	90.0	92	102	108	178	25.5	25.0	64	22	1/4
75	96.0	98	118	124	190	25.5	25.0	64	22	1/4
80	100.5	102	118	124	190	25.5	25.0	64	22	1/4

* tolerance of L3 dimension is ± 0.5 mm

Other dimensions are available on request.

USC Single mechanical seal · Compact (cartridge) design · Balanced

Single mechanical seal
Compact (cartridge) design
Balanced
Dual directional
Multispring

Application

Type USC is designed for a wide range of applications. It withstands such fluids as cold and hot water, oils, petroleum products, poorly aggressive chemical substances and other fluids containing abrasive particles.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa
Temperature	t max	180 °C
Speed	v max	12.5 m/s

Materials (codes as listed above)

Part	Code
Stationary and rotating rings	A, B, U, Q
Secondary, flexible seals	E, P, K, V
Spring	M
Other metal parts	G

Legend

1. Stationary ring
2. Rotating ring
3. Sleeve
4. Cover
5. Clamping ring
6. Expanding ring
7. Pin
8. Distance plate
9. Socket head screw
10. Grub screw
11. Springs
12. Flat gasket
13. O-ring
14. O-ring
15. O-ring

Dimensions (mm)

D1	D3	D4min	D4max	Dm	Dz	L1	L2	L3	S	G
24	39.2	40.0	46.0	52.5	102	27	18	61.5	14	1/4
25	40.2	41.0	49.0	55.5	105	27	18	61.5	14	1/4
28	43.2	44.0	52.5	58.5	108	27	18	61.5	14	1/4
30	45.2	46.0	55.5	62.0	111	27	18	61.5	14	1/4
32	47.2	48.0	55.5	62.0	111	27	18	61.5	14	1/4
33	48.2	49.0	55.5	62.0	111	27	18	61.5	14	1/4
35	50.2	51.0	57.5	66.5	111	27	18	61.5	14	1/4
38	55.0	57.2	60.5	73.0	127	28	18	63.5	14	1/4
40	57.0	58.0	60.5	73.0	127	28	18	63.5	14	1/4
43	60.0	61.0	63.5	73.0	127	28	18	63.5	14	1/4
45	62.0	63.5	70.0	76.0	133	28	18	63.5	14	1/4
48	65.0	66.7	73.0	84.0	140	28	18	63.5	14	1/4
50	67.0	68.0	73.0	84.0	140	28	18	63.5	14	1/4
53	70.0	71.0	76.0	84.0	140	29	19	65.0	14	1/4
55	72.5	74.0	79.5	93.5	146	29	19	65.0	18	1/4
58	75.0	76.2	82.5	93.5	146	29	19	65.0	18	1/4
60	77.0	79.4	86.0	100.0	152	29	19	65.0	18	1/4
63	84.0	85.8	92.0	106.5	159	30.5	19	66.5	18	1/4
65	86.0	88.9	95.0	106.5	159	30.5	19	66.5	18	1/4
70	90.0	92.1	98.5	109.5	159	30.5	19	66.5	18	1/4

Other dimensions are available on request.

USS Single mechanical seal · Compact (cartridge) design · Balanced

Single mechanical seal
Compact (cartridge) design
Balanced
Dual directional
Wave spring

Application

Type USS is a general purpose mechanical seal and it is designed for a wide range of applications. It withstands such fluids as cold and hot water, oils, petroleum products, poorly aggressive chemical substances and other fluids containing abrasive particles. It is recommended for most mediums in the food industry.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa
Temperature	t max	180 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Stationary ring	Q, U
Rotating ring	A, B, Q
Secondary, flexible seals	P, V, E, K
Spring	G, M
Other metal parts	G

Legend

1. Stationary ring
2. Rotating ring
3. Sleeve
4. Cover
5. Clamp ring
6. Aligning clamps
7. Retaining ring
8. Wave spring
9. Hex screw
10. Set screws
11. Flat gasket
12. O-ring
13. O-ring
14. O-ring

Dimensions (mm)

D1	D3	D4min	D4max	Dm	Dz	L1	L2	L3	S	G
22	39	41	48	56	105	10	26	60	14	1/4
25	42	44	51	58	105	12	26	62	14	1/4
26	44	46	52	65	105	12	26	62	14	1/4
28	46	48	52	65	105	12	26	62	14	1/4
30	47	49	56	65	105	12	26	62	14	1/4
32	49	51	57	67	105	12	26	62	14	1/4
33	49	51	62	70	113	12	26	62	14	1/4
35	54	56	66	75	123	15	26	65	14	3/8
38	59	61	69	75	123	15	26	65	16	3/8
40	61	63	69	80	130	15	26	65	16	3/8
43	64	66	70	80	130	15	26	65	16	3/8
45	66	68	73	84	138	16	26	67	16	3/8
48	69	71	75	84	138	16	26	67	16	3/8
50	71	73	78	87	142	16	26	67	18	3/8
53	78	80	87	97	147	21	26	73	18	3/8
55	80	82	87	97	147	21	26	73	18	3/8
60	85	87	91	97	157	21	26	73	18	3/8
65	90	92	99	102	163	29	26	82	18	3/8
70	99	101	108	109	170	29	26	82	18	3/8
75	104	106	119	118	190	29	26	82	18	3/8
80	109	112	124	129	195	29	26	82	18	3/8
85	114	117	128	135	200	33	30	90	22	3/8
90	119	122	135	145	205	33	30	90	22	3/8
95	124	127	137	148	210	33	30	90	22	3/8
100	130	133	144	154	218	33	30	90	22	3/8

* tolerance of L3 dimension is ± 0.5 mm

Other dimensions are available on request.

USP Double seal · Compact (cartridge) design · Balanced

Double seal
Compact (cartridge) design
Balanced
Dual directional
Multispring

Application

USP is a mechanical seal used for high viscosity products containing abrasive particles. USP mechanical seal requires the following fluid installations:

buffer (API Plan 52 ) or
barrier (API Plan 53).

Note

Max. pressure of barrier fluid is 1.6 MPa, but max. overpressure of barrier fluid is 0.5 MPa.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa
Temperature	t max	120 °C
Speed	v max	12.5 m/s

Materials (codes as listed above)

Part	Code
Rotating rings	A, B, U, Q
Stationary rings	Q, U
Secondary, flexible seals	V
Other metal parts	G

Legend

1. Stationary ring
2. Rotating ring
3. Rotating ring
4. Sleeve
5. Cover
6. Clamping ring
7. Expanding ring
8. Pin
9. Distance plate
10. Socket head screw
11. Grub screw
12. Thrust ring
13. Flat gasket
14. Springs
15. O-ring
16. O-ring
17. O-ring
18. O-ring

Dimensions (mm)

D1	D3	D4min	D4max	Dm	Dz	L1	L2	L3	S	G
24	39.2	40.0	46.0	54.0	105	32.5	21	85	14	1/4
25	40.2	41.0	49.0	54.0	105	32.5	21	85	14	1/4
28	43.2	44.0	52.5	57.0	108	32.5	21	85	14	1/4
30	45.2	46.0	55.5	60.5	111	32.5	21	85	14	1/4
32	47.2	48.0	55.5	60.5	111	32.5	21	85	14	1/4
33	48.2	49.0	55.5	60.5	111	32.5	21	85	14	1/4
35	50.2	51.0	57.5	63.5	111	32.5	21	85	14	1/4
38	55.0	57.2	60.5	71.5	127	34	23	87	14	1/4
40	57.0	58.0	60.5	71.5	127	34	23	87	14	1/4
43	60.0	61.0	63.5	71.5	127	34	23	87	14	1/4
45	62.0	63.5	70.0	81.0	140	34	23	87	14	1/4
48	65.0	66.7	73.0	81.0	140	34	23	87	14	1/4
50	67.0	68.0	73.0	81.0	140	34	23	87	14	1/4
53	70.0	71.0	76.0	90.5	152	35	23	89	14	1/4
55	72.5	74.0	79.5	90.5	152	35	23	89	14	1/4
58	75.0	76.2	82.5	96.8	165	35	23	89	18	1/4
60	77.0	79.4	86.0	96.8	165	35	23	89	18	1/4
63	84.0	85.8	92.0	109.5	178	38	25	98	18	1/4
65	86.0	88.9	95.0	109.5	178	38	25	98	18	1/4
68	90.0	92.1	98.5	109.5	178	38	25	98	18	1/4
70	90.0	92.1	98.5	109.5	178	38	25	98	18	1/4
75	96.0	98.5	108.0	125.5	190	38	25	98	18	1/4
80	100.5	101.6	111.0	125.5	190	38	25	98	18	1/4
85	107.0	108.0	117.5	135.0	203	38	25	98	22	1/4
90	111.5	114.3	127.0	151.0	216	38	25	98	22	1/4
95	116.0	117.5	130.5	151.0	216	38	25	98	22	1/4
100	121.0	123.9	140.0	168.0	228	38	25	98	22	1/4
105	127.0	130.0	149.0	168.0	228	38	25	98	22	1/4
110	132.5	136.5	159.0	178.0	241	38	25	98	22	1/4
115	141.5	142.9	168.0	186.5	254	38	25	98	22	1/4
120	141.5	142.9	168.0	186.5	254	38	25	98	22	1/4
125	146.5	149.2	168.0	186.5	254	38	25	98	22	1/4

Other dimensions are available on request.

BE2 Single mechanical seal · Compact (cartridge) design · Balanced

Single mechanical seal
Compact (cartridge) design
Balanced
Dual directional
Multispring

Application

BE2 seals are designed for process rotodynamic pumps and other equipment with rotational shafts working with different mediums, such as, e.g.:

hydrocarbons and oils,
poorly aggressive chemicals (pH>5),
slimes and slurries with abrasive solids (up to 15%),
water (pure, dirty, wastewater).

Features

compact design very suitable for stuffing boxes with restricted space,
easy and quick assembly and disassembly,
can replace packing seals directly,
the seal is centered against the pump shaft,
stationary ring can compensate the shaft, both radial runout and axial moves,
springs are protected against contact with pumped medium.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa
Temperature	t max	200 °C
Speed	v max	12.5 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	B, U2, Q
Stationary ring	U2, Q, V, S
Secondary, flexible seals	E, P, K, V
Spring	M
Other metal parts	G

Legend

1. Rotating ring
2. Stationary ring
3. O-ring
4. Sleeve
5. O-ring
6. Retaining ring
7. Cover
8. Flat gasket
9. Thrust ring
10. Washer
11. Springs
12. Clamp ring
13. Set screw
14. Aligning clamps
15. Hex screw

Dimensions (mm)

D1	D3	D4min	D4max	Dm	Dz	L1	L2	L3	S	G
22	38.0	40.0	48.0	56	105	15	28	63	14	1/4
25	43.0	44.0	51.0	58	105	15	28	63	14	1/4
26	46.0	47.0	52.0	65	105	15	28	63	14	1/4
28	46.0	47.0	52.0	65	105	15	28	63	14	1/4
30	48.0	49.0	56.0	65	105	15	28	63	14	1/4
32	49.8	51.0	57.0	67	105	15	28	63	14	1/4
33	49.8	51.0	57.0	67	110	15	28	63	14	1/4
35	53.0	54.0	62.0	70	113	15	28	63	14	3/8
38	56.0	57.0	66.0	75	123	15	28	63	14	3/8
40	58.0	59.0	69.0	75	123	15	28	63	16	3/8
43	60.5	61.5	70.5	80	130	15	28	63	16	3/8
45	62.5	64.0	73.0	80	130	15	28	63	16	3/8
48	65.6	67.0	75.0	84	138	15	28	63	16	3/8
50	68.0	69.0	78.0	87	142	15	28	63	16	3/8
53	72.0	73.0	87.0	97	147	15	28	63	18	3/8
55	73.0	74.0	83.0	97	147	15	28	63	18	3/8
60	78.0	79.0	91.0	102	157	15	28	63	18	3/8
65	83.0	84.5	99.0	109	163	15	28	63	18	3/8
70	93.0	95.0	108.0	118	170	19	32	77	18	3/8
75	98.0	100.0	119.0	129	190	19	32	77	18	3/8
80	105.0	107.0	124.0	135	195	19	32	77	18	3/8
85	110.0	112.0	128.0	139	200	19	32	77	22	3/8
90	115.0	117.0	135.0	145	205	19	32	77	22	3/8
95	119.0	120.7	137.0	148	210	19	32	77	22	3/8
100	125.4	127.0	144.0	154	218	19	32	77	22	3/8

Other dimensions are available on request.

BEQ Single mechanical seal · Cartridge (compact) design · Balanced

Single mechanical seal
Cartridge (compact) design
Balanced
Dual directional
Multi-spring

Application

Type BEQ is a general purpose mechanical seal with a wide scope of applications. It is designed for hot and cold water, oils, fuels, poorly aggressive chemicals and other liquids containing solid particles. Due to its compact design, it is suitable for stuffing boxes with packing seals. Type BEQ mechanical seal can be connected to external flushing installation acc. to API 682 Plan 11/61 or 32/61.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa
Temperature	t max	260 °C
Speed	v max	12.5 m/s

Materials (codes as listed above)

Part	Code
Stationary and rotating rings	A, B, U, Q
Secondary, flexible seals	E, P, K, V
Spring	M
Other metal parts	G

Legend

1. Rotating ring
2. Stationary ring
3. Sleeve
4. Cover
5. Clamp ring
6. Throttle bushing
7. Thrust ring
8. Distance plate
9. Retaining ring
10. Flat gasket
11. Thrust ring
12. Set screw
13. Hex screw
14. Springs
15. O-ring

Dimensions (mm)

D1	D3	D4min	D4max	Dm	Dz	L1	L2	L3	S	G
22	38.0	40.0	48.0	56.0	105	15	31	68	14	1/4
25	43.0	44.0	51.0	58.0	105	15	31	68	14	1/4
26	46.0	47.0	52.0	65.0	105	15	31	68	14	1/4
28	46.0	47.0	52.0	65.0	105	15	31	68	14	1/4
30	48.0	49.0	56.0	65.0	105	15	31	68	14	1/4
32	49.8	51.0	57.0	67.0	105	15	31	68	14	1/4
33	49.8	51.0	57.0	67.0	110	15	31	68	14	1/4
35	53.0	54.0	62.0	70.0	113	15	31	68	14	3/8
38	56.0	57.0	66.0	75.0	123	15	31	68	14	3/8
40	58.0	59.0	69.0	75.0	123	15	31	68	16	3/8
43	60.5	61.5	70.5	80.0	130	15	31	68	16	3/8
45	62.5	64.0	73.0	80.0	130	15	31	68	16	3/8
48	65.6	67.0	75.0	84.0	138	15	31	68	16	3/8
50	68.0	69.0	78.0	87.0	142	15	31	68	16	3/8
53	72.0	73.0	87.0	97.0	147	15	31	68	18	3/8
55	73.0	74.0	83.0	97.0	147	15	31	68	18	3/8
60	78.0	79.0	91.0	102.0	157	15	31	68	18	3/8
65	83.0	84.5	99.0	109.0	163	15	31	68	18	3/8
70	93.0	95.0	108.0	118.0	170	19	40	85	18	3/8
75	98.0	100.0	119.0	129.0	190	19	40	85	18	3/8
80	105.0	107.0	124.0	135.0	195	19	40	85	18	3/8
85	110.0	112.0	128.0	139.0	200	19	40	85	22	3/8
90	115.0	117.0	135.0	145.0	205	19	40	85	22	3/8
95	119.0	120.7	137.0	148.0	210	19	40	85	22	3/8
100	125.4	127.0	144.0	154.0	218	19	40	85	22	3/8

Other dimensions are available on request.

BED Double mechanical seal · Compact (cartridge) design · Balanced

Double mechanical seal
Compact (cartridge) design
Balanced
Multi-spring
Dual directional

Application

Type BED mechanical seals are designed for process centrifugal pumps and mixers handling fluids containing abrasive particles (ashes, ores, cement and other similar substances), heavy consistence or gluey slurries and they are used mostly in the following industries: petrochemical, refinery, chemical, pulp & paper, sugar and in wastewater treatment plants. It is recommended for mediums hazardous to humans and the environment.

BED type seal requires application of buffer liquid (API Plan 52) or barrier liquid external installation (API Plan 53). Maximum pressure of the buffer fluid is 1.8 MPa. If the temperature of the sealed liquid exceeds 80°C, installation with a cooler should be used.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.6 MPa
Temperature	t max	200 °C
Speed	v max	12.5 m/s

Materials (codes as listed above)

Part	Code
Stationary and rotating rings	A, B, U, Q
Secondary, flexible seals	E, P, K, V
Spring	M
Other metal parts	G

Legend

1. Rotating ring
2. Stationary ring
3. O-ring
4. Sleeve
5. O-ring
6. Retaining ring
7. Cover
8. Flat gasket
9. Thrust ring
10. Washer
11. Springs
12. Clamp ring
13. Set screw
14. O-ring
15. Aligning clamps
16. Hex screw

Dimensions (mm)

D1	D3	D4min	D4max	Dm	Dz	L1	L2	L3	S	G
22	38.0	40.0	48.0	56	105	36	31	91	14	1/4
25	43.0	44.0	51.0	58	105	36	31	91	14	1/4
26	46.0	47.0	52.0	65	105	36	31	91	14	1/4
28	46.0	47.0	52.0	65	105	36	31	91	14	1/4
30	48.0	49.0	56.0	65	105	36	31	91	14	1/4
32	49.8	51.0	57.0	67	105	36	31	91	14	1/4
33	49.8	51.0	57.0	67	110	36	31	91	14	1/4
35	53.0	54.0	62.0	70	113	36	31	91	14	3/8
38	56.0	57.0	66.0	75	123	36	31	91	14	3/8
40	58.0	59.0	69.0	75	123	36	31	91	16	3/8
43	60.5	61.5	70.5	80	130	36	31	91	16	3/8
45	62.5	64.0	73.0	80	130	36	31	91	16	3/8
48	65.6	67.0	75.0	84	138	36	31	91	16	3/8
50	68.0	69.0	78.0	87	142	36	31	91	16	3/8
53	72.0	73.0	87.0	97	147	36	31	91	18	3/8
55	73.0	74.0	83.0	97	147	36	31	91	18	3/8
60	78.0	79.0	91.0	102	157	36	31	91	18	3/8
65	83.0	84.5	99.0	109	163	36	31	91	18	3/8
70	93.0	95.0	108.0	118	170	46	35	112	18	3/8
75	98.0	100.0	119.0	129	190	46	35	112	18	3/8
80	105.0	107.0	124.0	135	195	46	35	112	18	3/8
85	110.0	112.0	128.0	139	200	46	35	112	22	3/8
90	115.0	117.0	135.0	145	205	46	35	112	22	3/8
95	119.0	120.7	137.0	148	210	46	35	112	22	3/8
100	125.4	127.0	144.0	154	218	46	35	112	22	3/8

Other dimensions are available on request.

BC, BC2 Single compact (cartridge) mechanical seals · Balanced · Dual directional

Single compact (cartridge) mechanical seals
Balanced
Dual directional
Multi-spring

Application

Mechanical seals types BC are designed for centrifugal pumps and other equipment with rotating shafts handling hot water mainly used in heat and power plants and other industries that use process hot water.

The BC2 version with integral cooler is also available. Main body of the seal is the same like in type BC with a cooling effect forced by rotation of the seal and the same way of assembling. The cooling system is optimized and redesigned in a specific way.

Features

Cartridge, compact design without auxiliary external installation (cooler, pipes and other equipment),
easy and quick assembly and disassembly,
better working conditions of the seal - better heat dissipation,
while the pump is not working, the seal is cooled continuously and o-rings have longer lifetime.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	6.0 MPa
Temperature	t max	200 °C
Speed	v max	25 m/s

Materials (codes as listed above)

Part	Code
Stationary and rotating rings	A, B, U, Q
Secondary, flexible seals	E, P, K, V
Spring	G, M
Other metal parts	F, G

Examples of application

Type of seal	Type of pump	Manufacturers of pumps
34 BC	8 C 16	POWEN-WAFAPOMP GROUP
41 BC	6 CD 25	POWEN-WAFAPOMP GROUP
45 BC (55 BC)	W 14 P	POWEN-WAFAPOMP GROUP
48 BC (56 BC)	W 14 PzAx4GV	POWEN-WAFAPOMP GROUP
50 BC	HG-3D	KSB
52 BC	HG1	KSB
58 BC	WT 200	KSB
68 BC	HM 200x3	POWEN-WAFAPOMP GROUP
75 BC (85 BC)	HD 150x8	POWEN-WAFAPOMP GROUP
80 BC (88 BC)	15 Z 28, 15 Z 33	POWEN-WAFAPOMP GROUP
85 BC	FA1D	WORTHINGTON
110 BC	150 CHP	SIGMA
110 BC	200 CHP	SIGMA
110 BC	HDG	KSB
110 BC	PE-270	SIGMA
140 BC	12 WNC 146	WORTHINGTON

BD Single compact (cartridge) mechanical seals · Balanced · Dual directional

Single compact (cartridge) mechanical seals
Balanced
Dual directional
Multi-spring

Application

Mechanical seals types BD are designed for centrifugal pumps and other equipment with rotating shafts handling hot water mainly used in heat and power plants and other industries that use process hot water.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.5 MPa
Temperature	t max	200 °C
Speed	v max	25 m/s

Materials (codes as listed above)

Part	Code
Stationary and rotating rings	A, B, U, Q
Secondary, flexible seals	E, P, K, V
Spring	G, M
Other metal parts	F, G

Examples of application

Type of seal	Type of pump	Manufacturers of pumps
49 BD	25 D 17	POWEN-WAFAPOMP GROUP
50 BD	10 K 22	POWEN-WAFAPOMP GROUP
60 BD	20 K 37	POWEN-WAFAPOMP GROUP
68 BD	15 K 34	POWEN-WAFAPOMP GROUP
68 BD	25 K 41, 25 K 40	POWEN-WAFAPOMP GROUP
72 BD	12 K 28	POWEN-WAFAPOMP GROUP
80 BD	20 S 28 Wz	POWEN-WAFAPOMP GROUP
80 BD	20 W 39	POWEN-WAFAPOMP GROUP
81(92) BD	W 24 P	POWEN-WAFAPOMP GROUP
85 BD	40 B33, 40 B 36	POWEN-WAFAPOMP GROUP
95(100) BD	35 W 50, 35 W 55	POWEN-WAFAPOMP GROUP
110 BD	30 WK 45	POWEN-WAFAPOMP GROUP
115 BD	35 B 40, 35 B 50	POWEN-WAFAPOMP GROUP
140 BD	40 B 61, 40 B 75	POWEN-WAFAPOMP GROUP
140 BD	40 B 80	POWEN-WAFAPOMP GROUP
140 BD	50 B 40, 50 B 63	POWEN-WAFAPOMP GROUP
145 BD	50 BS 50	POWEN-WAFAPOMP GROUP

BP Single compact (cartridge) mechanical seal · Multi-spring, balanced, dual-directional · Design according to EN ISO 21049 (API 682): type A, category 2 or 3, arrangement 1, configuration 1CW-FL (with a floating carbon throttle bushing)

Single compact (cartridge) mechanical seal
Multi-spring, balanced, dual-directional
Design according to EN ISO 21049 (API 682): type A, category 2 or 3, arrangement 1, configuration 1CW-FL (with a floating carbon throttle bushing)

Application

BP is a universal mechanical seal designed especially for pump installations for fluid hydrocarbons with small density and high pressure occuring in refineries, in the petrochemical and chemical industries. This mechanical seal is intended for the following mediums: propane-butane, ethanol, acetone, cumene, ethylenic hydrocarbons (olefins CnH2n), with high purity and having no abrasive particles. The mechanical seal BP can seal also pure chemical substances, some organic acids and heavy hydrocarbons.

Features

compact construction, it fits also into smaller pump stuffing boxes
easy assembly and disassembly of the mechanical seal
high resistance to deformation that could be caused by high pressure and high temperature
very low emission of volatile substances into the atmosphere
low friction due to the optimal form of main sealing rings
carbon throttle ring causing no spark, blocks the emission of volatile substances into the atmosphere eg. with gas installation (nitrogen) according to API 682 and separates leakage into the secure zone – torch
the seal connections enable to build the working arrangments with auxiliary installations according to API 682 Plan 11, 12, 13, 21, 22

Operating limits

Parameter	Symbol	Limit
Speed	v max	15 m/s
Pressure at t = -40 to 80 °C	p max	3.5 MPa
Pressure at t = 80 to 130 °C	p max	3.1 MPa
Pressure at t = 130 to 180 °C	p max	2.8 MPa
Pressure at t = 180 to 250 °C	p max	2.2 MPa

Materials (codes as listed above)

Part	Code
Rotating ring	A, Q, U
Stationary ring	Q, U
Secondary, flexible seals	E, V, K
Spring	M
Other metal parts	G, M

Dimensions (mm)

D1	D4	Ds	Dz	L1	L2	L3	M
40	90	125	160	38	36	95	12
50	100	140	180	38	36	95	16
60	120	160	200	38	36	95	16
70	130	170	210	38	36	95	16
80	140	180	220	38	36	95	16
90	160	205	245	38	36	95	20
100	170	215	255	40	36	100	20
110	180	225	265	40	36	100	20

Other dimensions are available on request.

BPD Double compact (cartridge) mechanical seal · Multi-spring, balanced, dependent on the direction of shaft rotation · Design according to EN ISO 21049 (API 682): type A, category 2 or 3, arrangement 2 or 3 configuration 2CW-CW or 3CW-FB

Double compact (cartridge) mechanical seal
Multi-spring, balanced, dependent on the direction of shaft rotation
Design according to EN ISO 21049 (API 682): type A, category 2 or 3, arrangement 2 or 3 configuration 2CW-CW or 3CW-FB

Application

BPD is a universal mechanical seal designed especially for pump installations for the fluid hydrocarbons with small density and high pressure occurring in the refineries, in the petrochemical and chemical industries. This mechanical seal is intended for the following mediums: propane-butane, ethanol, acetone, cumene, ethylenic hydrocarbons (olefins CnH2n), with high purity and having no abrasive particles. The mechanical seal BPD can seal also pure chemical substances, some organic acids and heavy hydrocarbons. The mechanical seals type BPD eliminate hazardous emissions of process medium into the atmosphere by using a tandem seal arrangement according to API 682 type 2 with cooling – separating installation and quench thermosiphon vessel.

Features

compact construction, it fits also into smaller pump stuffing boxes
high operating safety, the seal eliminates explosion hazards by having a tandem seal arrangement what restricts the emission of volatile substances into the atmosphere
high resistance to deformation that could be caused by high pressure and high temperature, greater sealing ring durability thanks to additional cooling
forced circulation of quench (cooling) fluid in accordance with API 682 Plan 54
low friction due to the optimal form of main sealing rings
possibility to monitor the seals working conditions by quench fluid control
the seal connections enable to build the working arrangements with auxiliary installations according to API 682 Plan 11/52, 11/53, 12/52, 12/53
the pump does not stop working also after a failure of the main seal
easy assembly and disassembly of the mechanical seal

Operating limits

Parameter	Symbol	Limit
Speed	v max	15 m/s
Pressure at t = -40 to 80 °C	p max	3.5 MPa
Pressure at t = 80 to 130 °C	p max	3.1 MPa
Pressure at t = 130 to 180 °C	p max	2.8 MPa
Pressure at t = 180 to 250 °C	p max	2.2 MPa

Materials (codes as listed above)

Part	Code
Rotating ring	A, Q, U
Stationary ring	Q, U
Secondary, flexible seals	E, V, K
Spring	M
Other metal parts	G, M

Dimensions (mm)

D1	D4	Ds	Dz	L1	L2	L3	M
40	90	125	160	38	76.5	135	12
50	100	140	180	38	84.5	145	16
60	120	160	200	38	84.5	145	16
70	130	170	210	38	84.5	145	16
80	140	180	220	38	84.5	145	16
90	160	205	245	38	84.5	145	20
100	170	215	255	40	84.5	150	20
110	180	225	265	40	84.5	150	20

Other dimensions are available on request.

BU Single compact (cartridge) mechanical seal · Multi-spring, balanced, dual-directional · Design according to EN ISO 21049 (API 682): type A, category 2 or 3, arrangement 1, configuration 1CW-FL (with a floating carbon throttle bushing)

Single compact (cartridge) mechanical seal
Multi-spring, balanced, dual-directional
Design according to EN ISO 21049 (API 682): type A, category 2 or 3, arrangement 1, configuration 1CW-FL (with a floating carbon throttle bushing)

Application

BU is a single cartridge mechanical seal designed to work with media containing abrasive particles, especially with crude oil and impure hydrocarbons. BU seal requires an auxiliary system according to EN ISO 21049 (API 682), Plans: 11/61, 11/62, 12/61, 12/62, 13/61, 13/62.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	4.2 MPa
Temperature	t max	180 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	Q, U
Stationary ring	A, B, Q, U
Secondary, flexible seals	V, K, M
Spring	M
Other metal parts	G, M

Dimensions (mm)

D1	D4	DS	DZ	L1	L2	L3	M
20	70	105	140	25	73	117	M12
30	80	115	150	25	73	117	M12
40	90	125	160	25	73	117	M12
50	100	140	180	25	73	117	M16
60	120	160	200	30	79	130	M16
70	130	170	210	30	79	130	M16
80	140	180	220	30	79	130	M16
90	160	205	245	30	79	130	M20
100	170	215	255	35	79	145	M20
110	180	225	265	35	79	145	M20

Other dimensions are available on request.

BUV Double compact (cartridge) mechanical seal · Multi-spring, balanced, dependent on the direction of shaft rotation · Design according to EN ISO 21049 (API 682): type A, category 2 or 3, arrangement 2 or 3, configuration 2CW-CW or 3CW-FB

Double compact (cartridge) mechanical seal
Multi-spring, balanced, dependent on the direction of shaft rotation
Design according to EN ISO 21049 (API 682): type A, category 2 or 3, arrangement 2 or 3, configuration 2CW-CW or 3CW-FB

Application

BUV is a double cartridge mechanical seal designed to work with media containing abrasive particles, especially with crude oil and impure hydrocarbons. BUV seal requires an auxiliary system according to EN ISO 21049 (API 682), Plans: 11/52, 11/53A, 12/52, 12/53A, 13/52, 13/53A.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	4.2 MPa
Temperature	t max	180 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	Q, U
Stationary ring	A, B, Q, U
Secondary, flexible seals	V, K, M
Spring	M
Other metal parts	G, M

Dimensions (mm)

D1	D4	DS	DZ	L1	L2	L3	M
20	70	105	140	45	66	130	M12
30	80	115	150	50	61	130	M12
40	90	125	160	55	56	130	M12
50	100	140	180	55	66	140	M16
60	120	160	200	55	76	150	M16
70	130	170	210	60	88	170	M16
80	140	180	220	65	88	175	M16
90	160	205	245	65	93	180	M20
100	170	215	255	65	98	185	M20
110	180	225	265	65	98	185	M20

Other dimensions are available on request.

EP Single compact (cartridge) mechanical seal · Metal bellows · Multi-spring, balanced, dual-directional

Single compact (cartridge) mechanical seal
Metal bellows
Multi-spring, balanced, dual-directional
Design according to EN ISO 21049 (API 682): type B, category 1 (any glands) or 2 (gland dimensions acc. to ISO 13709), arrangement 1, configuration 1CW-FL

Application

EP is designed to operate with hydrocarbons present in oil refining processes. It is designed according to EN ISO 21049 (API 682) recommendations.

EP seal is compatible with API 682 Plans:

at the process side – Plans: 11, 12, 13, 23, 31, 32
at the atmosphere side – Plans: 61, 62, 65.

Features

implementation of non-sparking carbon graphite throttle ring enables blocking the emission of volatile substances into the environment and separating potential outflow from the atmosphere (to the safe zone)
compact construction, it fits also into smaller pump stuffing boxes
cartridge design provides easy and quick assembly and disassembly without setting the fixing dimensions
very low emission of volatile substances into the atmosphere
supplied seal is fully assembled which excludes possible mistakes during the assembly process

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa
Temperature	t max	200 °C
Speed	v max	20 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	Q, U
Secondary, flexible seals	E, K, V
Spring	M
Other metal parts	G

Legend

1. Rotary part E1
2. Stationary ring
3. Throttle ring EP
4. Thrust ring EP
5. Sleeve EP
6. Cover EP
7. Clamp ring EP
8. Distance plate EP.
9. Retaining ring
10. Retaining ring
11. Set screw
12. Hex screw
13. Spring
14. O-ring
15. O-ring
16. O-ring
17. O-ring

Dimensions (mm)

D1	D4	DS	DZ	L1	L2	M
20	70	105	140	82	105	M12x1,75
30	80	115	150	82	105	M12x1,75
40	90	125	160	82	105	M12x1,75
50	100	140	190	82	110	M16x2,0
60	120	160	200	82	115	M16x2,0
70	130	170	210	82	115	M16x2,0
80	140	180	220	87	125	M16x2,0
90	160	205	250	87	125	M20x2,5
100	170	215	260	87	125	M20x2,5
110	180	225	270	87	125	M20x2,5

Other dimensions are available on request.

EPD Double compact (cartridge) mechanical seal · Metal bellows · Multi-spring, balanced, dependent on the direction of rotation

Double compact (cartridge) mechanical seal
Metal bellows
Multi-spring, balanced, dependent on the direction of rotation
Design according to EN ISO 21049 (API 682): type C, category 2 or 3, arrangement 2 or 3, configuration 2CW-CW or 3CW-FB

Application

EPD is a double mechanical seal with metal bellows designed to work with hot hydrocarbons in the petroleum refining processes.

The seal requires the application of auxiliary installations according to EN ISO 21049 (API 682) Plan 52 or Plan 53.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.2 MPa
Temperature	t max	400 °C
Speed	v min	25 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	Q
Secondary, flexible seals	G
Welded bellows	G, M, T
Other metal parts	T, M

Dimensions (mm)

D1	D4	Ds	Dz	L1	L2	L3	M
20	70	105	140	48	76	140	12
30	80	115	150	53	78	147	12
40	90	125	160	58	76	150	12
50	100	140	180	54	90	160	16
60	120	160	200	59	89	166	16
70	130	170	210	63	86	168	16
80	140	180	220	68	85	172	16
90	160	205	245	63	92	177	20

Other dimensions are available on request.

GK4 Double gas-lubricated seal ”face to face” · Compact (cartridge) design · Dependent on the direction of rotation:

Double gas-lubricated seal ”face to face”
Compact (cartridge) design
Dependent on the direction of rotation:
Multi-spring
Requires a barrier gas supply
Non-contacting operation

Application

GK4 seals are intended to be used in pumps and compressors operating in explosive environment or handling toxic and hazardous substances. The main areas of their application are: chemical, petrochemical, refinery and coke industries, transportation of natural and industrial gases. Sealed substances could be gases or vapors of flammable or aggressive liquids, e.g ammonia, ethylene, acetone, hydrogen chloride, hydrogen sulphide, etc.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.0 MPa
Temperature	t max	170 °C
Speed	n	1000 to 4000 rpm

Materials (codes as listed above)

Part	Code
Rotating ring	A, B
Stationary ring	Q, U
Secondary, flexible seals	E, K, V
Spring	M
Other metal parts	G

Dimensions (mm)

D1	D2	D4	Ds	Dz	L1	L2	L3
40	14	90	125	150	87	67.5	94
50	18	100	140	170	87	67.5	94
60	18	120	160	190	87	67.5	94
70	18	130	170	200	87	67.5	94
80	18	140	180	210	87	67.5	94
90	22	160	205	240	85	67	125
100	22	170	215	250	85	67	125
110	22	180	225	260	85	67	125
120	22	200	250	290	90	70	134
130	22	210	260	300	90	70	134
140	22	220	270	310	90	70	134
150	22	230	280	320	90	70	134
160	22	240	290	330	90	70	134

Other dimensions are available on request.

GF Double gas-lubricated seal ”face to face” · Compact (cartridge) design · Dependent on the direction of rotation:

Double gas-lubricated seal ”face to face”
Compact (cartridge) design
Dependent on the direction of rotation:
Multi-spring
Requires a barrier gas supply
Non-contacting operation

Application

GF seals are destined for toxic, corrosive, explosive, abrasive mediums, dangerous for human health or environment and process gases used in chemical, petrochemical, pharmaceutical applications. Recommended when particular cleanness of a product should be assured and when frictional heat causes changes in medium properties.

Features

very long lifetime and long MTBF (mean time between failures),
no emission of harmful medium into the atmosphere – they meet stringent ecological requirements in the range of harmful substances,
possible operation in mediums, which do not form a lubricating film,
ensures complete leak tightness of a pump (also in the case of a barrier gas pressure failure, the seal continues operation in the contact mode).

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.2 MPa
Temperature	t max	200 °C
Speed	v min	1 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	Q, U
Stationary ring	A, B
Secondary, flexible seals	E, V, K
Spring	G
Other metal parts	G

Legend

1. Rotating rings
2. O-ring
3. Springs
4. Stationary ring
5. O-ring
6. Driving pin
7. Protective ring
8. Sleeve
9. O-ring
10. Locating pin
11. Locating pin
12. Insert of cover
13. Cover
14. Flat gasket
15. Hex screw
16. Clamp ring
17. Set screws
18. Protective ring
19. Assembly arm
20. Hex screws
21. Protective ring

Dimensions (mm)

D1	D4	Dm	Dz	L1	L2	L3	S
22	42	66	98	75.5	17	36.5	11
25	45	69	100	75.5	17	36.5	11
32	52	76	108	75.5	17	36.5	11
35	55	79	110	75.5	17	36.5	11
40	60	84	120	75.5	17	36.5	14
45	65	89	118	75.5	17	36.5	14
48	68	93	130	75.5	17	36.5	14
55	75	100	140	75.5	17	36.5	14
75	100	124	170	79.0	15	42.0	18

Other dimensions are available on request.

M1, M1L Single mixer mechanical seal · Balanced · Multi-spring

Single mixer mechanical seal
Balanced
Multi-spring
Dual directional
Either without bearing (M1) or with integral bearing (M1L)

Application

Type M1, M1L mechanical seals are applied to seal top entry drives in agitators, mixers or blenders in cases when nonaggressive and non-hazardous media are sealed with the use of cooling-flushing liquid preventing from dry running. They can be made of materials that are approved for use in the pharmaceutical and food industries.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	0.6 MPa
Temperature	t max	200 °C
Speed	v max	4 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	Q, V
Secondary, flexible seals	P, V, E, K
Spring	G, M
Other metal parts	G, M

Dimensions (mm)

D3	D1	N x D2	D4	D8	K	L1	L2	M2	H1 (M1)	H2 (M1L)	A,B	C
30	175	4 x 18	110	70	145	20	40	M16	130	185	G3/8	G1/8
40	175	4 x 18	110	70	145	20	40	M16	130	190	G3/8	G1/8
50	240	8 x 18	176	135	210	20	40	M16	140	210	G1/2	G1/8
60	240	8 x 18	176	135	210	20	40	M16	140	210	G1/2	G1/8
70	240	8 x 18	176	135	210	20	45	M16	150	225	G1/2	G1/8
80	275	8 x 22	204	155	240	20	50	M20	160	245	G1/2	G1/8
90	275	8 x 22	204	155	240	20	50	M20	160	255	G1/2	G1/8
100	305	8 x 22	234	190	270	20	50	M20	160	255	G1/2	G1/8
110	305	8 x 22	234	190	270	20	55	M20	170	260	G1/2	G1/8
125	330	8 x 22	260	215	295	20	55	M20	170	270	G1/2	G1/8

Other dimensions are available on request.

M2, M2L Single mixer mechanical seal · Unbalanced · Multi-spring

Single mixer mechanical seal
Unbalanced
Multi-spring
Dual directional
Either without bearing (M2) or with integral bearing (M2L)

Application

Type M2, M2L mechanical seals are applied to seal top entry drives in agitators, mixers or blenders in cases when chemically aggressive and environmentally hazardous products are processed. The seals are adapted for operating with low-pressure installations of barrier or flushing-cooling liquids. They can be made of materials that are approved for use in the pharmaceutical and food industries.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.0 MPa
Temperature	t max	200°C
Speed	v max	8 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	Q, V
Secondary, flexible seals	P, V, E, K
Spring	G, M
Other metal parts	G, M

Dimensions (mm)

D3	D1	N x D2	D4	D8	K	L1	L2	M2	H1 (M2)	H2 (M2L)	A,B	C
30	175	4 x 18	110	70	145	20	40	M16	150	200	G3/8	G1/8
40	175	4 x 18	110	70	145	20	40	M16	160	210	G3/8	G1/8
50	240	8 x 18	176	135	210	20	40	M16	175	230	G1/2	G1/8
60	240	8 x 18	176	135	210	20	40	M16	175	230	G1/2	G1/8
70	240	8 x 18	176	135	210	20	45	M16	180	240	G1/2	G1/8
80	275	8 x 22	204	155	240	20	50	M20	180	260	G1/2	G1/8
90	275	8 x 22	204	155	240	20	50	M20	185	270	G1/2	G1/8
100	305	8 x 22	234	190	270	20	50	M20	190	265	G1/2	G1/8
110	305	8 x 22	234	190	270	20	55	M20	195	270	G1/2	G1/8
125	330	8 x 22	260	215	295	20	55	M20	205	290	G1/2	G1/8

Other dimensions are available on request.

M3, M3L Double mixer mechanical seal · Balanced · Dual directional

Double mixer mechanical seal
Balanced
Dual directional
Either without bearing (M3) or with integral bearing (M3L)

Application

Type M3, M3L mechanical seals are applied to seal top entry drives in agitators, mixers or blenders in cases when chemically aggressive and environmentally hazardous products are processed. The seals are adapted for operating with low-pressure installations of barrier or flushing-cooling liquids. They can be made of materials that are approved for use in the pharmaceutical and food industries.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	2.5 MPa
Temperature	t max	-20 °C to 200 °C
Speed	v max	4 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A, B, Q
Stationary ring	Q, V
Secondary, flexible seals	P, V, E, K
Spring	G, M
Other metal parts	G, M

Dimensions (mm)

D3	D1	N x D2	D4	D8	K	L1	L2	M2	H1 (M3)	H2 (M3L)	A,B	C
30	175	4 x 18	110	70	145	20	40	M16	165	210	G3/8	G1/8
40	175	4 x 18	110	70	145	20	40	M16	170	220	G3/8	G1/8
50	240	8 x 18	176	135	210	20	40	M16	185	240	G1/2	G1/8
60	240	8 x 18	176	135	210	20	40	M16	185	240	G1/2	G1/8
70	240	8 x 18	176	135	210	20	45	M16	190	250	G1/2	G1/8
80	275	8 x 22	204	155	240	20	50	M20	190	270	G1/2	G1/8
90	275	8 x 22	204	155	240	20	50	M20	195	280	G1/2	G1/8
100	305	8 x 22	234	190	270	20	50	M20	200	275	G1/2	G1/8
110	305	8 x 22	234	190	270	20	55	M20	205	280	G1/2	G1/8
125	330	8 x 22	260	215	295	20	55	M20	210	295	G1/2	G1/8

Other dimensions are available on request.

M4, M4L Double mixer mechanical seal · Design with horizontal axis of rotation · Unbalanced

Double mixer mechanical seal
Design with horizontal axis of rotation
Unbalanced
Multi-spring
Dual directional
Without bearing (M4) or with integral bearing (M4L)

Application

The M4 and M4L mechanical seals are designed for sealing shafts of mixers and reactors in which thick, high viscosity products as well as chemically aggressive and environmentally hazardous ones are processed. The seals are adapted for operating with low-pressure installations of barrier or flushing-cooling fluids. M4 seals have horizontal or vertical rotation axis and in M4L embodiment they play the role of the bearing shaft unit. The presence of barrier liquid enables seal operation in medium vapours only („dry” running) and prevents the product from getting out into the atmosphere. They can be made of materials that are approved for use in the pharmaceutical and food industries.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	1.0 MPa
Temperature	t max	200 °C
Speed	v max	10 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A,B, Q
Stationary ring	Q, V
Secondary, flexible seals	E, V, K
Spring	M
Other metal parts	G, M

Dimensions (mm)

D3	D1	N x D2	D4	K	L1	L2	L3	H1 (M4)	H2 (M4L)	A,B
50	217	8 x 12	170	195	20	40	82	121	178	G3/8
60	227	8 x 12	180	205	20	40	82	130	187	G3/8
70	255	8 x 14	195	230	25	45	82	140	202	G1/2
80	265	8 x 14	210	240	25	50	82	155	235	G1/2
90	285	8 x 14	230	260	25	50	82	170	250	G1/2
100	295	8 x 14	240	270	25	50	82	180	260	G1/2
110	315	8 x 14	255	290	25	55	82	186	270	G1/2
120	335	8 x 16	265	305	30	55	94	200	288	G1/2
130	345	8 x 16	275	315	30	55	94	200	291	G1/2

Other dimensions are available on request.

MS Single mixer mechanical seal for dry running conditions · Balanced · Outside mounted

Single mixer mechanical seal for dry running conditions
Balanced
Outside mounted
Multi-spring
Dual directional

Application

Type MS mechanical seal has a rotating ring made of special resin impregnated carbon graphite and special design which improve heat dissipation and other working conditions in case of dry running. Auxiliary installations are not necessary. It is designed for mixers, agitators and other equipment with rotating shafts used mainly in chemical, food processing, pharmaceutical and pulp & paper industries, for use with non-aggressive and non-hazardous media. A special dampening device is available to eliminate dry run screech. It can be made of materials that are approved for use in the pharmaceutical and food industries.

Operating limits

Parameter	Symbol	Limit
Pressure	p max	0.6 MPa
Temperature	t max	180 °C
Speed	v max	2.5 m/s

Materials (codes as listed above)

Part	Code
Rotating ring	A,B
Stationary ring	Q
Secondary, flexible seals	E, P, V, K
Spring	M
Other metal parts	G, M

Legend

1. Stationary ring
2. O-ring
3. Rotating ring
4. O-ring
5. Seal housing
6. O-ring
7. Retaining ring
8. Spring
9. Set screw
10. Pin
11. Cover
12. Cover
13. O-ring
14. Sleeve
15. Set screw
16. Screw

Dimensions (mm)

D1	D2	D3	Dr	Ds	Dz	Dm x n	Do	L1	L2	L3	L4	H	G
40	80	86	70	136	160	14 x 4	102	60.4	25.4	55.6	16-0.1	100	G 3/8
50	90	96	80	147	171	14 x 4	112	60.4	25.4	55.6	16-0.1	100	G 3/8
60	99	105	90	157	181	14 x 4	121	60.4	25.4	55.6	16-0.1	100	G 3/8
70	109	115	100	167	190	14 x 4	132	60.4	25.4	55.6	16-0.1	100	G 3/8
80	118	124	110	176	200	14 x 6	140	60.4	25.4	55.6	16-0.1	100	G 3/8
90	128	134	120	187	211	14 x 6	152	60.4	25.4	55.6	16-0.1	100	G 3/8
100	140	146	130	198	222	14 x 6	162	60.4	25.4	55.6	16-0.1	100	G 3/8
110	152.4	158.4	140	210	235	14 x 6	177	60.4	25.4	55.6	16-0.1	100	G 3/8

Other dimensions are available on request.

MDZ Single compact (cartridge) mechanical seal · Split design · Hydraulically balanced

Single compact (cartridge) mechanical seal
Split design
Hydraulically balanced
Multi-spring
Independent of the direction of rotation
Springs are isolated from sealed liquids

Application

MDZ is a single cartridge (compact) split seal designed to work with contaminated media with solid particles. Split seals are designed for devices, in which disassemble and re-assemble of conventional seal takes many hours. Fully split design of a cartridge seal MDZ solves the problem of seal replacement without dismantling a device. MDZ seal is perfect for use in devices with difficult access, such as pumps or mixers. MDZ type can be widely used in the chemical, petrochemical, pharmaceutical, pulp and paper, food and energy sectors.

Operating limits

Parameter	Symbol	D1 45 to 75	D1 80 to 95	D1 100 to 125	D1 above 125
Pressure	p max	1.7 MPa	1.4 MPa	1.0 MPa	0.7 MPa
Temperature	t max	175 °C	175 °C	175 °C	175 °C
Speed	n max	3600 1/min	1800 1/min	1800 1/min	875 1/min

Materials (codes as listed above)

Part	Code
Rotating ring	Q
Stationary ring	Q, B
Secondary, flexible seals	V
Spring	M
Other metal parts	G

Dimensions (mm)

D1	D3	D4min	D4max	Dz	Dm	L1	L2	Lz	LF	M
45	65.1	66.68	78.2	140	84.9	6.35	54.0	64.0	16.7	14.3
48	68.2	68.85	79.38	140	90.5	6.35	54.0	64.0	16.7	14.3
50	68.2	68.85	79.38	140	90.5	6.35	54.0	64.0	16.7	14.3
55	77.8	79.40	88.90	159	100.0	6.35	54.0	64.0	16.7	17.4
60	81.0	85.73	95.25	165	104.8	6.35	54.0	64.0	16.7	17.4
65	85.0	88.90	98.40	165	112.8	6.35	54.0	64.0	16.7	17.4
68	90.5	92.08	104.78	169	112.8	6.35	54.0	64.0	16.7	17.4
70	90.5	92.08	104.78	197	112.8	6.35	54.0	64.0	16.7	17.4
75	96.8	100.00	111.10	203	125.4	6.35	54.0	64.0	16.7	17.4
80	106.4	108.00	120.65	210	131.8	7.14	62.0	72.0	20.6	20.6
90	115.9	117.50	130.20	219	141.3	7.14	62.0	72.0	20.6	20.6
95	117.5	119.05	130.18	222	144.5	7.14	62.0	72.0	20.6	20.6
100	125.4	127.00	136.52	224	147.6	7.14	62.0	72.0	20.6	20.6
110	135.0	136.50	149.20	235	163.5	7.14	62.0	72.0	20.6	20.6
115	140.5	142.90	155.60	248	173.0	7.14	62.0	72.0	20.6	20.6
120	143.7	146.05	158.75	248	176.2	7.14	62.0	72.0	20.6	20.6
125	157.2	160.30	171.40	273	185.7	9.50	77.8	96.8	23.4	23.8
140	169.9	173.00	184.10	292	198.4	9.50	78.0	97.0	23.4	23.8
145	176.2	179.40	193.70	305	207.2	9.50	77.8	96.8	23.4	23.8

Other dimensions are available on request.

D1	D3	D4min	D4max	Dm	Dz	L1	L2	L3	S	G
22	39	41	48	56	105	10	26	60	14	1/4
25	42	44	51	58	105	12	26	62	14	1/4
26	44	46	52	65	105	12	26	62	14	1/4
28	46	48	52	65	105	12	26	62	14	1/4
30	47	49	56	65	105	12	26	62	14	1/4
32	49	51	57	67	105	12	26	62	14	1/4
33	49	51	62	70	113	12	26	62	14	1/4
35	54	56	66	75	123	15	26	65	14	3/8
38	59	61	69	75	123	15	26	65	16	3/8
40	61	63	69	80	130	15	26	65	16	3/8
43	64	66	70	80	130	15	26	65	16	3/8
45	66	68	73	84	138	16	26	67	16	3/8
48	69	71	75	84	138	16	26	67	16	3/8
50	71	73	78	87	142	16	26	67	18	3/8
53	78	80	87	97	147	21	26	73	18	3/8
55	80	82	87	97	147	21	26	73	18	3/8
60	85	87	91	97	157	21	26	73	18	3/8
65	90	92	99	102	163	29	26	82	18	3/8
70	99	101	108	109	170	29	26	82	18	3/8
75	104	106	119	118	190	29	26	82	18	3/8
80	109	112	124	129	195	29	26	82	18	3/8
85	114	117	128	135	200	33	30	90	22	3/8
90	119	122	135	145	205	33	30	90	22	3/8
95	124	127	137	148	210	33	30	90	22	3/8
100	130	133	144	154	218	33	30	90	22	3/8

D1	D4	Ds	Dz	L1	L2	L3	M
40	90	125	160	38	36	95	12
50	100	140	180	38	36	95	16
60	120	160	200	38	36	95	16
70	130	170	210	38	36	95	16
80	140	180	220	38	36	95	16
90	160	205	245	38	36	95	20
100	170	215	255	40	36	100	20
110	180	225	265	40	36	100	20

D1	D4	DS	DZ	L1	L2	L3	M
20	70	105	140	25	73	117	M12
30	80	115	150	25	73	117	M12
40	90	125	160	25	73	117	M12
50	100	140	180	25	73	117	M16
60	120	160	200	30	79	130	M16
70	130	170	210	30	79	130	M16
80	140	180	220	30	79	130	M16
90	160	205	245	30	79	130	M20
100	170	215	255	35	79	145	M20
110	180	225	265	35	79	145	M20

D1	D4	DS	DZ	L1	L2	L3	M
20	70	105	140	45	66	130	M12
30	80	115	150	50	61	130	M12
40	90	125	160	55	56	130	M12
50	100	140	180	55	66	140	M16
60	120	160	200	55	76	150	M16
70	130	170	210	60	88	170	M16
80	140	180	220	65	88	175	M16
90	160	205	245	65	93	180	M20
100	170	215	255	65	98	185	M20
110	180	225	265	65	98	185	M20

D1	D4	Ds	Dz	L1	L2	L3	M
20	70	105	140	48	76	140	12
30	80	115	150	53	78	147	12
40	90	125	160	58	76	150	12
50	100	140	180	54	90	160	16
60	120	160	200	59	89	166	16
70	130	170	210	63	86	168	16
80	140	180	220	68	85	172	16
90	160	205	245	63	92	177	20

D1	D3	D4min	D4max	Dm	Dz	L1	L2	L3	S	G
22	39	41	48	56	105	10	26	60	14	1/4
25	42	44	51	58	105	12	26	62	14	1/4
26	44	46	52	65	105	12	26	62	14	1/4
28	46	48	52	65	105	12	26	62	14	1/4
30	47	49	56	65	105	12	26	62	14	1/4
32	49	51	57	67	105	12	26	62	14	1/4
33	49	51	62	70	113	12	26	62	14	1/4
35	54	56	66	75	123	15	26	65	14	3/8
38	59	61	69	75	123	15	26	65	16	3/8
40	61	63	69	80	130	15	26	65	16	3/8
43	64	66	70	80	130	15	26	65	16	3/8
45	66	68	73	84	138	16	26	67	16	3/8
48	69	71	75	84	138	16	26	67	16	3/8
50	71	73	78	87	142	16	26	67	18	3/8
53	78	80	87	97	147	21	26	73	18	3/8
55	80	82	87	97	147	21	26	73	18	3/8
60	85	87	91	97	157	21	26	73	18	3/8
65	90	92	99	102	163	29	26	82	18	3/8
70	99	101	108	109	170	29	26	82	18	3/8
75	104	106	119	118	190	29	26	82	18	3/8
80	109	112	124	129	195	29	26	82	18	3/8
85	114	117	128	135	200	33	30	90	22	3/8
90	119	122	135	145	205	33	30	90	22	3/8
95	124	127	137	148	210	33	30	90	22	3/8
100	130	133	144	154	218	33	30	90	22	3/8

D1	D4	Ds	Dz	L1	L2	L3	M
40	90	125	160	38	36	95	12
50	100	140	180	38	36	95	16
60	120	160	200	38	36	95	16
70	130	170	210	38	36	95	16
80	140	180	220	38	36	95	16
90	160	205	245	38	36	95	20
100	170	215	255	40	36	100	20
110	180	225	265	40	36	100	20

D1	D4	DS	DZ	L1	L2	L3	M
20	70	105	140	25	73	117	M12
30	80	115	150	25	73	117	M12
40	90	125	160	25	73	117	M12
50	100	140	180	25	73	117	M16
60	120	160	200	30	79	130	M16
70	130	170	210	30	79	130	M16
80	140	180	220	30	79	130	M16
90	160	205	245	30	79	130	M20
100	170	215	255	35	79	145	M20
110	180	225	265	35	79	145	M20

D1	D4	DS	DZ	L1	L2	L3	M
20	70	105	140	45	66	130	M12
30	80	115	150	50	61	130	M12
40	90	125	160	55	56	130	M12
50	100	140	180	55	66	140	M16
60	120	160	200	55	76	150	M16
70	130	170	210	60	88	170	M16
80	140	180	220	65	88	175	M16
90	160	205	245	65	93	180	M20
100	170	215	255	65	98	185	M20
110	180	225	265	65	98	185	M20

D1	D4	Ds	Dz	L1	L2	L3	M
20	70	105	140	48	76	140	12
30	80	115	150	53	78	147	12
40	90	125	160	58	76	150	12
50	100	140	180	54	90	160	16
60	120	160	200	59	89	166	16
70	130	170	210	63	86	168	16
80	140	180	220	68	85	172	16
90	160	205	245	63	92	177	20

Technical Specifications

Rotating & Stationary Ring (Face) Materials

Secondary (Flexible) Seal Materials

Spring Material

Other Metal Parts Material

Seal Range

Application

Note

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Note

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Note

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Note

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Note

Operating limits

Materials (codes as listed above)

Legend A12, A13

Legend B12

Dimensions (mm)

Application

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Operating limits

Materials (codes as listed above)

Legend

Dimensions (mm)

Application

Operating limits

D1	D3	D4min	D4max	Dm	Dz	L1	L2	L3	S	G
22	39	41	48	56	105	10	26	60	14	1/4
25	42	44	51	58	105	12	26	62	14	1/4
26	44	46	52	65	105	12	26	62	14	1/4
28	46	48	52	65	105	12	26	62	14	1/4
30	47	49	56	65	105	12	26	62	14	1/4
32	49	51	57	67	105	12	26	62	14	1/4
33	49	51	62	70	113	12	26	62	14	1/4
35	54	56	66	75	123	15	26	65	14	3/8
38	59	61	69	75	123	15	26	65	16	3/8
40	61	63	69	80	130	15	26	65	16	3/8
43	64	66	70	80	130	15	26	65	16	3/8
45	66	68	73	84	138	16	26	67	16	3/8
48	69	71	75	84	138	16	26	67	16	3/8
50	71	73	78	87	142	16	26	67	18	3/8
53	78	80	87	97	147	21	26	73	18	3/8
55	80	82	87	97	147	21	26	73	18	3/8
60	85	87	91	97	157	21	26	73	18	3/8
65	90	92	99	102	163	29	26	82	18	3/8
70	99	101	108	109	170	29	26	82	18	3/8
75	104	106	119	118	190	29	26	82	18	3/8
80	109	112	124	129	195	29	26	82	18	3/8
85	114	117	128	135	200	33	30	90	22	3/8
90	119	122	135	145	205	33	30	90	22	3/8
95	124	127	137	148	210	33	30	90	22	3/8
100	130	133	144	154	218	33	30	90	22	3/8

D1	D4	Ds	Dz	L1	L2	L3	M
40	90	125	160	38	36	95	12
50	100	140	180	38	36	95	16
60	120	160	200	38	36	95	16
70	130	170	210	38	36	95	16
80	140	180	220	38	36	95	16
90	160	205	245	38	36	95	20
100	170	215	255	40	36	100	20
110	180	225	265	40	36	100	20

D1	D4	DS	DZ	L1	L2	L3	M
20	70	105	140	25	73	117	M12
30	80	115	150	25	73	117	M12
40	90	125	160	25	73	117	M12
50	100	140	180	25	73	117	M16
60	120	160	200	30	79	130	M16
70	130	170	210	30	79	130	M16
80	140	180	220	30	79	130	M16
90	160	205	245	30	79	130	M20
100	170	215	255	35	79	145	M20
110	180	225	265	35	79	145	M20

D1	D4	DS	DZ	L1	L2	L3	M
20	70	105	140	45	66	130	M12
30	80	115	150	50	61	130	M12
40	90	125	160	55	56	130	M12
50	100	140	180	55	66	140	M16
60	120	160	200	55	76	150	M16
70	130	170	210	60	88	170	M16
80	140	180	220	65	88	175	M16
90	160	205	245	65	93	180	M20
100	170	215	255	65	98	185	M20
110	180	225	265	65	98	185	M20

D1	D4	Ds	Dz	L1	L2	L3	M
20	70	105	140	48	76	140	12
30	80	115	150	53	78	147	12
40	90	125	160	58	76	150	12
50	100	140	180	54	90	160	16
60	120	160	200	59	89	166	16
70	130	170	210	63	86	168	16
80	140	180	220	68	85	172	16
90	160	205	245	63	92	177	20