Nitrile rubber Buna-N
The rated temperature range of the nitrile rubber seat is -18 ℃ ~ 100 ℃. Also commonly called NBR, NITRILE, or HYCAR. It is an excellent general purpose rubber material for water, gas, oil and grease, gasoline (except gasoline with additives), alcohol and glycol, liquefied petroleum gas, propane and butane, fuel oil and many other media . It also has good wear resistance and deformation resistance.
Food grade (FG) nitrile rubber valve seat rated temperature range is -18 ℃ ~ 82 ℃. Its composition complies with CFR Part 21 Section 177.2600. Its use range is the same as that of conventional nitrile rubber but requires FDA (US Food and Drug Administration) certification.
Ethylene propylene rubber EPDM
The rated temperature range of the ethylene-propylene rubber valve seat is -28 ℃ ~ 120 ℃. EPDM is the abbreviation of its composition, that is, a terpolymer of ethylene, propylene and diene, usually also called EPT, Nordell, EPR. Excellent ozone resistance and weather resistance, good electrical insulation performance, good resistance to polar capacitors and inorganic media. Therefore, it can be widely used in HVAC industry, water, phosphate, alcohol, ethylene glycol, etc. Ethylene-propylene rubber seats are not recommended for use with hydrocarbon organic solvents and oils, chlorinated hydrocarbons, turpentine, or other petroleum-based greases.
The rated temperature range of food grade ethylene propylene rubber valve seat is -28 ℃ ~ 120 ℃. Its composition complies with CFR Part 21 Section 177.2600. Its use range is the same as that of conventional nitrile rubber but requires FDA (US Food and Drug Administration) certification.
