The sealing material of a direct impact on the operational status of equipment, good sealing material can extend equipment uptime, reduce leakage, and reduce pollution.
At present, the commonly used material is a synthetic rubber and synthetic resin.
A wide variety of synthetic rubber, widely use in nitride rubber and polyurethane rubber.
Nitride rubber with good oil resistance, heat resistance, cold resistance, pressure resistance and water resistance, and suitable for wear resistance, usually use temperature is roughly as follows:-40 ° C to +120 ° C, easy to use metal molded into any shape, hydraulic seals, nitride rubber best suited to the production of working pressure of not more than 32MPa the hydraulic cylinder with hydraulic seals.
High tensile strength of polyurethane rubber, with excellent oil resistance, heat resistance, cold resistance, pressure resistance and wear resistance, the normal use temperature of -40 ° C-+80° C, polyurethane rubber at room temperature sealing performance nitrile rubber is superior, it is particularly suitable for the production of pressure, high pressure and high pressure hydraulic cylinder with hydraulic seals.
Synthetic resin, POM, nylon and PTFE filled. Widely used is filled PTFE, the PTFE monomer suitable graphite, molybdenum disulfide, bronze powder, carbon black and glass fiber fillers anda score of material. Carbon atoms in the PTFE molecules the halogen element, the negative charge of the strongest fluorine atom closely surrounded, therefore, very good chemical stability, and good oil resistance, heat resistance, cold resistance, pressure and abrasion resistance, the normal use temperature of about -100 ° C-+260 ° C Due to van der Waals forces between the molecules is very small, so little what viscous friction coefficient is also very small; even less oil or no oil lubrication conditions can also work. Particularly suitable for the production of high-pressure and ultrahigh pressure rapid movement of the hydraulic cylinder with hydraulic seals.



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