Manual air valve is a common type of valve in the industrial field, mainly used to control gas flow. In manual air valves, the sealing gasket is a key component and plays an important role in maintaining the sealing performance of the valve.
The requirements for sealing gaskets of manual air valves mainly include corrosion resistance, high temperature resistance, pressure resistance, good sealing performance and wear resistance. First of all, since manual air valves are often used in chemical, petroleum, pharmaceutical and other environments, their sealing gaskets need to have good corrosion resistance and be able to resist the erosion of various corrosive media. Common sealing gasket materials include rubber, polytetrafluoroethylene (PTFE), etc. These materials have excellent corrosion resistance and can be used for a long time without damage.
Secondly, manual air valves may encounter high temperature environments in some industrial processes, such as oil refining, chemical industry and other fields. Therefore, the sealing gasket needs to have good high temperature resistance and be able to maintain its elasticity and sealing performance. Some special high-temperature sealing gasket materials, such as polytetrafluoroethylene (PTFE) reinforced materials, graphite, etc., can maintain good sealing performance in high-temperature environments.
In addition, since the manual air valve is used to control gas flow, its sealing gasket needs to have good pressure resistance. In industrial processes, gas pressures can be very high, so sealing gaskets need to be able to withstand high pressures without leaking. The pressure resistance of a sealing gasket is closely related to the strength of its material and structural design.
At the same time, the sealing gasket of the manual air valve needs to have good sealing performance to effectively prevent gas leakage. The sealing gasket needs to be in close contact with the valve body and valve core or valve plate, and be able to withstand large pressure to ensure the sealing performance of the valve. The material selection, structural design and processing accuracy of the sealing gasket will all affect its sealing performance.
Finally, the sealing gasket of the manual air valve may be worn during long-term use. Therefore, the sealing gasket needs to have certain wear resistance and be able to maintain its sealing performance during long-term use. Some special sealing gasket materials, such as polytetrafluoroethylene (PTFE) reinforced materials, polyimide, etc., have better wear resistance.