Selection suggestion
raw materials
-40°C to +325°C, high temperature resistance, almost all chemical corrosion resistance, high cleanliness, low permeability, good elasticity and wear resistance. Mainly used in semiconductor, medical, energy and petrochemical machinery industries.
FFKM
-20°C to +250°C, oil resistant, heat resistant, drug resistant, solvent resistant, intolerant to ketones, esters, and nitrates. Mainly used in O-rings, diaphragms, hoses, pump parts, automobiles, motorcycles, diesel engines, semiconductor industries and chemical equipment.
FKM
-50°C to +150°C, aging resistance, ozone resistance, weather resistance, drug resistance, wear resistance, water resistance, alcohol and ketone resistance, not for food use or in hydrocarbons. Mainly used in wire covering, automotive wind barrier belt, window frame, steam radiator.
EPDM
-40°C to +150°C, wear resistance, corrosion resistance, tensile resistance, tear resistance, oxygen resistance and compression deformation characteristics, better wear resistance than NBR. Mainly used in the sealing ring of environmental protection cold coal system, air conditioner and automobile engine.
HNBR
-40°C to +120°C, Oil resistant, water resistant, abrasion resistant, mineral oil resistant, non-polar solvent resistant. Mainly used in oil seals. Mainly used in fuel oil, lubricating oil systems and nuclear industry, but cannot be used in ketone and lipid polar solvents.
NBR
-70°C to +220°C, heat resistant, cold and weather resistance, good electrical insulation, Oil, ozone and solvent intolerant. Mainly used in food machinery, medical equipment.
VMQ
-150°C to +80°C, super wear resistance, impact resistance, low temperature resistance, chemical resistance, strong oxidant intolerance, low coefficient. Mainly used in machinery, chemical industry, food and medical industry.
UPE
-180°C to +300°C, High performance engineering plastics, good heat resistance, wear resistance, chemical resistance, high compressive strength and high hardness. Mainly used in steam valve seals, air compressor seals, petrochemical seals and other high temperature seals.
PEEK
-200°C to +260°C, heat resistance, cold resistance, chemical resistance, weather resistance, insulation material. Mainly used in low temperature and vacuum sealing, petrochemical, machinery, food and medical, cannonball, anti-melting gasket.
PTFE
-195°C to +125°C, has excellent chemical stability, insulation and weather resistance, mechanical strength and hardness are better than PTFE, and the film has transparency and low air permeability rate. Mainly used in liquid nitrogen, liquid oxygen equipment seals, vacuum systems, gas pipes, etc.
pCTFE
-200°C to +200°C, heat resistance, cold resistance, chemical resistance, insulation. Mainly used in transparent film, chemical pipeline, medical food and chemical industry.
FEP
-200°C to +260°C, heat resistance, cold resistance, chemical resistance, insulation. Mainly used in semiconductor ultra-pure fluid pipelines, medical food and chemical industries.
PFA
How to Choose Material for Seals?
Working condition = (medium + temperature + motion) → material selection