Nitrile (or NBR) O-Rings are most commonly available and are cost effective. Ideal for use as seals on pumps, drive belts, and other general engineering applications.NBR is good for applications that need to withstand fats, Greases and high temperature (+70°C). Temperature Range -40°C to +120°C (avoid prolonged use at higher extremes) Suitable for: Many hydrocarbons, fats, oils gasoline, petroleum based hydraulic fluid etc

Rubber Viton O Ring  

Viton (FKM) O Rings have a low compression set and have high temperature and chemical resistance.

More expensive than NBR O Rings.

The terms FPM, FKM and Viton very often cause confusion and lead to incorrect interpretations. All of these designations actually stand for one single base material: fluoro rubber.Temperature Range -30°C to +200°C (avoid prolonged use at higher extremes)

Rubber EPDM O Ring

Excellent resistance to weathering and ozone, water and steam, with good performance in castor and some phosphate ester based fluids. Its low and high temperature capability is good, having excellent resistance to set with good resilience. Also high temperature braking systems employing castor based fluids for mouldings subjected to weathering and ozone and for seals in chemical plant due to its good chemical resistance.

EPDM is particularly useful when sealing phosphate-ester hydraulic fluids and in brake systems that use fluids having a glycol or silicone base. This results in a highly fluorinated elastomeric compound with exceptional temperature resistance, compatibility with a wide range of aggressive chemical combinations and outstanding resistance to permanent deformation.

Chemical resistance

Hot water and steam up to 149°C with special compounds up to 260°C

Glycol based brake fluids (Dot 3 & 4) and silicone-based brake fluids (Dot 5) up to 149°C

Many organic and inorganic acids

Cleaning agents, sodium and potassium alkalis

Phosphate-ester based hydraulic fluids (HFD-R)

Silicone oil and grease

Many polar solvents (alcohols, ketones, esters)

Ozone, aging and weather resistant

  2014 hot selling CFY factory different colored NBR rubber o ring manufacturer

 Silicone possess excellent resistance to temperature extremes. Silicone's retention of properties at high temperatures is superior to other elastic materials. Silicone has poor tensile strength, tear resistance and abrasion resistance.

Chemical resistance

Dry heat

High - aniline point oils

Chlorinated DI - phenyls

Food processing applications

Excellent ozone resistance.

Water (Low temperature only)

Hydrogenated nitrile is a synthetic polymer that results from the hydrogenation of nitrile rubber (NBR). This gives it superior mechanical characteristics, particularly high strength, greater thermal stability and helps reduce extrusion and wear.

Chemical resistance

Aliphatic hydrocarbons

Vegetable and animal fats and oils

HFA, HFB and HFC hydraulic fluids

Dilute acids, bases and salt solutions at moderate temperatures

Water and steam up to 149°C (300°F)

Ozone, aging and weathering

Applications:

Automobile,Mechanical seals,Electronic, Fluid seals, Air Valve seals, Hydraulic seals ,Oil seals.

Our factory introduction: 

We have been engaged in rubber o rings and rubber parts industries for more than 16 years.

We mainly specialize in producing different types of  o-rings, rubber washers, rubber gaskets, customized rubber parts products.The materials are available in NBR, VITON, EPDM,SILICON,HNBR,CR,SBR and all other popular rubbers.We have more than one thousand available O-ring moulds and can open new moulds as customers' drawings. 

Packaging:

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