Gate Valve Rubber Polypak Seal

The ESA valve rubber seal is a type of Polypak, it combines a rubber o-ring type and a conventional lip type seal to produce a unique sealing device.

Product Detail

Gate Valve Rubber Polypak Seal

Polypak is an extruded seal with a symmetrical profile and can be used in rod or piston applications. Its rectangular cross-section ensures the stability of the gland and is an economic choice for use as a separate seal or with a buffer 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 O-ring exciter acts as an energizer to maintain seal contact under low pressure or vacuum applications. The inclined lip design of polypak is very suitable for cutting liquid films.

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.

ESA
unnamed (2)

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

Working Conditions

0~15000 PSI PU PU Hydraulic fluids, crude oil, sour oil/gas, H2S, salty water NBR/HNBR/FKM

Gate Valve Polypak Seal Dimensions

Inch

0.71 1.26 0.31
0.79 1.38 0.39
0.87 1.38 0.39
0.98 1.5 0.24
0.98 1.77 0.39
1 1.5 0.25
1.02 1.57 0.39
1.1 1.65 0.39
1.1 1.73 0.39
1.1 1.89 0.39
1.18 1.97 0.39
1.22 1.73 0.39
1.25 2 0.39
1.26 1.89 0.39
1.26 2.05 0.39
1.38 2.17 0.39
1.42 2.05 0.39
1.5 2.24 0.39
1.5 2.25 0.39
1.5 1.75 0.25
1.57 2.36 0.39
1.77 2.56 0.39
1.81 2.56 0.39
1.97 2.76 0.39
2.17 2.95 0.39
2.36 3.15 0.39
2.56 3.35 0.39
MAX 1000

MM

18 32 8
20 35 10
22 35 10
25 38 6
25 45 10
25.4 38.1 6.3
26 40 10
28 42 10
28 44 10
28 48 10
30 50 10
31 44 10
31.7 50.7 10
32 48 10
32 52 10
35 55 10
36 52 10
38 57 10
38.1 57.1 10
38.1 44.5 6.3
40 60 10
45 65 10
46 65 10
50 70 10
55 75 10
60 80 10
65 85 10