PTFE valve sealing rings are mostly used for globe valves, gate valves and ball valves with temperature T < 230 C and nominal pressure PN < 6.4MPa. They can be filled with different materials according to the requirements of service pressure, temperature, chemical corrosion resistance and wear resistance of valves.

Valve Seal Ring Details

Common materials and service conditions of valve sealing rings are as follows:

_Polytetrafluoroethylene

Polytetrafluoroethylene (PTFE) is mostly used for globe valves, gate valves and ball valves with temperature T < 230 C and nominal pressure PN < 6.4MPa. It can be filled with different materials according to the requirements of service pressure, temperature, chemical corrosion resistance and wear resistance of the valves.

_nylon

Nylon has the characteristics of low friction coefficient and good corrosion resistance. Nylon is mostly used in ball valves and globe valves with temperature T < 90 C, nominal pressure PN < 32 MPa, etc.

Rubber

The comprehensive properties of synthetic rubber, such as oil resistance, temperature resistance and corrosion resistance, are superior to those of natural rubber. Generally, the use temperature of synthetic rubber is less than 200 C. Rubber is used for sealing valves such as globe valves, gate valves, diaphragm valves, butterfly valves, check valves and pinch valves with nominal pressure PN less than 1 MPa.