Gate valve rubber polypak seal
The ESA valve stem seals a type of Polypak, it combines a rubber o-ring type and a conventional lip type seal to produce a unique sealing device.
The range of materials available to the user of the ESA seal insures the proper combination for abrasion, extrusion, temperature resistance and fluid compatability which produces high sealability and long life.
Loaded U-cups were primarily designed for dynamic reciprocating applications. The O-rings loader makes this seal excellent for low-pressure rod and piston applications. With loaded U-cups as the system pressure increases, so does the force on the loading lips. Sealing force automatically compensates for the higher pressure, maintaining a positive seal.
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Advantages:
1.Normally used for low pressure valve stem
2.Excellent sealing performance
3.High friction
4.High torque
5.Cost-effective
6.High wear resistance
7.High sealability
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Working Conditions
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Working Pressure
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Working Temperature
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Working Medium
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Material
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0~15000 PSI
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PU
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Hydraulic fluids, crude oil, sour oil/gase, H2S, salty water
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NBR/HNBR/FKM
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Application Suggestion:
PFF valve, FC valve, FLS valve, FL valve,etc.
Size:
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Inch
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MM
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|
Inch
|
MM
|
|
d
|
D
|
H
|
d
|
D
|
H
|
d
|
D
|
H
|
d
|
D
|
H
|
|
0.71
|
1.26
|
0.31
|
18
|
32
|
8
|
1.26
|
2.05
|
0.39
|
32
|
52
|
10
|
|
0.79
|
1.38
|
0.39
|
20
|
35
|
10
|
1.38
|
2.17
|
0.39
|
35
|
55
|
10
|
|
0.87
|
1.38
|
0.39
|
22
|
35
|
10
|
1.42
|
2.05
|
0.39
|
36
|
52
|
10
|
|
0.98
|
1.50
|
0.24
|
25
|
38
|
6
|
1.5
|
2.24
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0.39
|
38
|
57
|
10
|
|
0.98
|
1.77
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0.39
|
25
|
45
|
10
|
1.5
|
2.25
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0.39
|
38.1
|
57.1
|
10
|
|
1.00
|
1.50
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0.25
|
25.4
|
38.1
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6.3
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1.5
|
1.75
|
0.25
|
38.1
|
44.5
|
6.3
|
|
1.02
|
1.57
|
0.39
|
26
|
40
|
10
|
1.57
|
2.36
|
0.39
|
40
|
60
|
10
|
|
1.10
|
1.65
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0.39
|
28
|
42
|
10
|
1.77
|
2.56
|
0.39
|
45
|
65
|
10
|
|
1.10
|
1.73
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0.39
|
28
|
44
|
10
|
1.81
|
2.56
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0.39
|
46
|
65
|
10
|
|
1.10
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1.89
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0.39
|
28
|
48
|
10
|
1.97
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2.76
|
0.39
|
50
|
70
|
10
|
|
1.18
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1.97
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0.39
|
30
|
50
|
10
|
2.17
|
2.95
|
0.39
|
55
|
75
|
10
|
|
1.22
|
1.73
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0.39
|
31
|
44
|
10
|
2.36
|
3.15
|
0.39
|
60
|
80
|
10
|
|
1.25
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2.00
|
0.39
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31.7
|
50.7
|
10
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2.56
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3.35
|
0.39
|
65
|
85
|
10
|
|
1.26
|
1.89
|
0.39
|
32
|
48
|
10.0
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MAX 1000
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