The valve sealing surface of the key face, the sealing surface between their quality of life of the valve, the sealing surface material generally be considered corrosion, abrasion, erosion resistance, anti-oxidation and other factors.

Usually divided into two categories:

1. Soft materials

① Rubbers (including nitrile rubber, fluorine rubber, etc.)

② Plastic (PTFE, nylon, etc.)

(Two) seal material

A copper alloy (for low pressure valves)

2, chrome stainless steel (for general high pressure valves)

3, Stellite (for high temperature high pressure valves and strong corrosion valve)

4, nickel-based alloys (for corrosive media)

2. Seal material

① Copper alloy (for low pressure valves)

② Chrome stainless steel (for general high pressure valves)

③ Stellite (for high temperature high pressure valves and strong corrosion valve)

④ nickel-based alloys (for corrosive media)

 Keywords:butterfly valve ,knife gate valve,ball valve,globe valve,slurry gate valve