Valve sealing material

NBR nitrile rubber: excellent oil resistance, high wear resistance, good heat resistance and strong adhesion. It is not suitable for insulation. It is the most widely used and lowest cost rubber seal. Applicable medium: water, gas oil, normal temperature, corrosive polar fluid. Temperature -40~120 °C

VITON Fluororubber (FKM): It is superior to silicone rubber in high temperature resistance, has excellent weather resistance, ozone resistance and chemical resistance, and has poor cold resistance. Suitable for sealing requirements in diesel engines, fuel systems and chemical plants. It is suitable for strong acid and alkali, high corrosive, high temperature fluid, and has several corrosion resistance and high temperature resistance. The general temperature range is -40~260 °C.

EPDM rubber: It has good weather resistance, ozone resistance, water resistance and chemical resistance. Suitable for use in sanitary equipment, automotive radiators and automotive brake systems. Not recommended for food use or exposure to mineral oil. It is suitable for moderately corrosive media such as sulfuric acid, hydrochloric acid and weak acid and alkali. The general temperature range is -55~150 °C.

PTFE Teflon: It is resistant to high temperature and corrosion, and it is heat resistant. It is also easy to stain and easy to clean. PTFE is relatively fragile to particles, dust, impurities, etc. If the above medium is contained in the fluid to be used, it is necessary to install a filtering device in the flow path to prevent entry of foreign matter. High and low temperature resistance: The influence on temperature is not changed much, and the temperature range is wide. The temperature can be used from -190 to 260 °C.