Type 57B/58B/58U
ELASTOMER O-RING SEALS
Technical Specification
A
B
C
D
E
F
G
H
– Face/Primary Ring
– Seat/Mating Ring
– O-ring
– Anti-X Ring
– Snap Ring
– Spring
– Disc
– Retainer
G
D
A
H
F
C
E
B
Product Description
The Type 57B and 58B are hydraulically balanced, multispring DIN 24960/EN 12756 seals. The Type 58U is an unbalanced multispring DIN24960/EN12756 seal.They are versatile
designs using components common to other O-ring and
wedge type seals. They allow easy repair, reduce inventory
and permit a simple conversion to unbalanced or wedge
seals.
• For use in general and high pressure sealing duties, including chemical processing, refinery and petrochemical plants.
• Complies with International Standard ISO 3069,
European Standards EN 12756, DIN 24960, and BS
5257: 1975. Also comply with API 610 specifications.
Design Features
• 57B/58B has hydraulically balanced seal face giving lower
face loading at high pressure
• Multiple spring arrangement ensures even loading
of seal face.
• 57B accepts a maximum axial movement of
0.118"/±3.0mm
Performance Capabilities
• Temperature: –40°F to +500°F/–40°C to +260°C
(depending on materials used)
• Pressure: Type 57B/58B: up to 900 psi(g)/62 bar(g)
Type 58U: up to 250 psi(g)/17 bar(g)
• Speed: up to 5000 fpm/25 m/s
Type 57B/58B/58U
ELASTOMER O-RING SEALS
Technical Specification
Type 58U Typical Arrangement
For ease of installation, the lead-in edge of the
shaft or sleeve should be chamfered as shown.
D3
D4
D1
L3
Alternative method of drive. Pin to be press
fit in driving collar or impeller, and to engage
in seal retainer as shown.
L1K*
Type 58U Dimensional Data (mm)
Seal Size
(mm)
14
16
18
20
22
24
25
28
30
32
33
35
38
40
43
45
48
50
53
55
58
60
63
65
68
70
75
80
85
90
95
100
Seal Size
Code
0140
0160
0180
0200
0220
0240
0250
0280
0300
0320
0330
0350
0380
0400
0430
0450
0480
0500
0530
0550
0580
0600
0630
0650
0680
0700
0750
0800
0850
0900
0950
1000
D1h6
14
16
18
20
22
24
25
28
30
32
33
35
38
40
43
45
48
50
53
55
58
60
63
65
68
70
75
80
85
90
95
100
D3
24
26
32
34
36
38
39
42
44
46
47
49
54
56
59
61
64
66
69
71
78
80
83
85
88
90
95
104
109
114
119
124
D4
26
28
34
36
38
40
41
44
46
48
49
51
58
60
63
65
68
70
73
75
83
85
88
90
93
95
104
109
114
119
124
129
D5
18.4
20.4
24.5
26.5
28.5
30.5
31.5
34.5
36.5
38.5
39.5
41.5
45.0
47.0
50.0
52.0
55.0
57.0
60.0
62.0
67.5
69.5
72.5
74.5
77.5
79.5
83.5
89.5
94.5
99.5
104.5
109.5
NOTE: Dimensions apply to all seal and seat types unless otherwise indicated.
*When used with a BP, BO, BC and BD mating ring.
D6
2.5
2.5
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
L1(K)*
35.0
35.0
37.5
37.5
37.5
40.0
40.0
42.5
42.5
42.5
42.5
42.5
45.0
45.0
45.0
45.0
45.0
47.5
47.5
47.5
52.5
52.5
52.5
52.5
52.5
60.0
60.0
60.0
60.0
65.0
65.0
65.0
L3
23.0
23.0
24.0
24.0
24.0
26.7
27.0
30.0
30.0
30.5
30.5
30.5
32.0
32.0
32.0
32.0
32.0
34.0
34.0
34.0
39.0
39.0
39.0
39.0
39.0
45.5
45.5
45.0
45.0
50.0
50.0
50.0
L45
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
4.0
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
Type 57B/58B/58U
ELASTOMER O-RING SEALS
Technical Specification
Hydrostatic Pressure Limits
Materials of Construction
SEAL COMPONENTS
MATERIALS
Description
Standard
Options
Primary Ring/Face
Resin-Impregnated Carbon Graphite
Sintered Silicon Carbide
Antimony Impregnated Carbon Graphite
Snap Ring
Set Screw
Disc
Retainer
Springs
316 Stainless Steel
Alloy 400 (Monel®)
Alloy C-276 (UNS N10276)
Anti-X Ring
Pure PTFE
—
Secondary Seal O-Ring
Nitrile
Fluorocarbon
Ethylene Propylene
Perfluoroelastomer
Monel is a registered trademark of Inco Alloys International, Inc.