NBR has good of resistance oily, and heat sex, and Hardy sex, and resistance pressure sex rotating equipment mechanical sealed and resistance water, and has suitable of wear sex, usually of using temperature dye whole mechanical sealed degrees roughly for:-40 ° C-+120 ° c, easily with metal molded into any shape of hydraulic sealed pieces, so, NBR most suitable Yu making work pressure is unlikely to Yu 32MPa of hydraulic cylinder with hydraulic sealed pieces.
High tensile strength of polyurethane rubber, fluorine plastic pump mechanical seals with excellent oil resistance, heat-resistance, cold resistance, pressure resistance and wear resistance, usually working temperature:-40 ° C-+80 ° c, polyurethane rubber at room temperature than nitrile rubber sealing performance is superior, it is particularly suitable for making pressure, high pressure and ultra high pressure hydraulic seals for hydraulic cylinders.
Synthetic resins are Pom, nylon and filled PTFE. Widely used was PTFE, it is added into the Teflon monomers suitable graphite, molybdenum disulfide, bronze powder, carbon and glass fiber fillers such as high score materials. As the PTFE molecule of carbon atoms in the strongest negative fluorine atoms in a halogen element closely surrounded, so very good chemical stability, and has good oil resistance, heat-resistance, cold resistance, pressure resistance and wear resistance, usually using a temperature of about-100 ° C-+260 ° c. Also due to van der Waals forces between the molecules are very small, so little or no viscosity, coefficient of friction is minimal; even in a little oil or oil-free lubrication conditions can work properly. Particularly suitable for making high pressure and ultra high pressure fast-moving hydraulic seals for hydraulic cylinders.