HNBR FKM Weco Union Seal Ring Fig 1002 1502 602 For Sour Serve

Union seal with brass ring

The use of brass rings can increase the tightness of the seal, prevent leakage, and maintain stable performance in long-term use, extending the service life. In addition, the corrosion resistance of brass can also ensure that the sealing effect is maintained in various environments, especially in weak acids, weak alkalis and salt water.

Union seal with stainless steel ring

It has high corrosion resistance and can resist corrosion from weak corrosive media such as air, steam, water, and chemical substances such as acid, alkali, and salt. The strength and corrosion resistance of stainless steel vary with the alloy elements, and it has high heat resistance and wear resistance.

Rubber union seal

Rubber seals have good elasticity and compression memory, and can adapt to a wide range of temperatures, from extremely low temperatures to high temperatures. Their manufacturing cost is relatively low, making them suitable for large-scale production and application. In low-pressure, low-temperature and normal temperature environments, rubber seals usually have better sealing effects than metal seals.

Nitrile

-40ºC to 120ºC
-40ºF to 248ºF

1.Presently the most widely used rubber in the seal industry
2.Exceptional balance of good mechanical properties, wear properties, and chemical resistance
3.Resistance to most mineral oils and greases

HNBR

-40ºC to 160ºC
-40ºF to 320ºF

1.Chemical resistance
2.Wider temperature range than standard nitrile
3.High strength material that resists extrusion, abrasion, and wear
4.Water and steam resistance to +149ºC(+300ºF)
5.H2S resistance up to 10%
6.Commonly used with petroleum oils and CO2

FKM

-26ºC to 230ºC
-15ºF to 446ºF

1.Excellent resistance to higher temperature, petroleum, and gasoline
2.Good chemical resistance, including to refrigerants
3.Great mechanical properties are retained over a wide temperature range
4.Commonly used with ammonia

-268ºC to 250ºC
-450ºF to 483ºF

Vitually universal chemical resistance

-54°C to 105°C
-65°F to 220°F

1.Thermoplastic elastomer with higher tensile strength, toughness, and wear resistance
2.Great combination of hardness and elasticity

3.Excellent low temperature flexibility

4.Commonly used in high pressure hydraulic systems where parts are subject to wear