Silicone rubber seals are not used for dynamic seals

Silicone rubber sealing ring has excellent heat resistance, low temperature elasticity and particularly excellent resistance to oxidation and ozone performance, with high permeability and gas permeability of the selectivity. Good electrical insulation properties (volume resistance greater than 10 ohm.cm, breakdown voltage above 30kv / mm), resistance to corona and arc resistance. But the addition of conductive carbon black, nickel powder, aluminum powder, silver powder, but also get the appropriate conductivity (volume resistivity up to 5-0.02 Europe. Silicone rubber seal ring surface energy is low, with hygroscopicity, can play a role in isolation. Water resistant, but water vapor is not good, the pressure is more than 50psi is not recommended. Compatible with most oils, chemicals and solvents. General silicone rubber seal ring acid and alkali resistance, polar solvent tolerance is acceptable, not resistant to hydrogen and aromatic aromatic oil. It is not recommended for use in most concentrated solvents, oils, concentrated acids and diluted caustic solutions. Special silicone rubber also has resistance to radiation, fire, oil and other properties. Its low tensile strength, anti-wear ability is weak, generally not used for dynamic sealing.