Seal! — — Pneumatic valve seal commonly used materials

pneumatic valve seal material with metal and nonmetal two kinds big. Commonly used materials and their conditions of use are as follows:

synthetic rubber synthetic rubber oil resistant, heat resistance, corrosion resistance and so on comprehensive performance is better than that of natural rubber. Use temperature of t ℃ or less general synthetic rubber, natural rubber t ℃ or less and rubber is used in the nominal pressure of PN MPa or less by pneumatic pneumatic valve, gate valve, pneumatic diaphragm valve, pneumatic valve, check valve pneumatic butterfly valve, pneumatic valve and pneumatic valve sealing.

nylon nylon has the characteristics of small friction coefficient, good corrosion resistance. Nylon for temperature of t ℃ or less and nominal pressure of PN MPa or less pneumatic ball valve, globe pneumatic valve, etc.
ptfe
ptfe used for temperature of t ℃ or less and nominal pressure PN or less. The MPa as pneumatic pneumatic valve, ball valve, gate valve, etc.

cast iron cast iron used for temperature of t ℃ or less, nominal pressure PN or less. MPa, gas and oil in the pneumatic brake valve, globe pneumatic valve and plug valve, etc. Babbit

t - babbitt used in temperature ~ ℃, nominal pressure PN or less. MPa ammonia as a pneumatic valve.

copper alloy and copper alloy - for commonly used material - Tin bronze and - - Manganese brass, etc. Copper alloy good abrasion resistance, applicable to the temperature of t ℃ or less, nominal pressure PN or less. MPa water and steam, is often used to brake the pneumatic valve, pneumatic valve, globe check pneumatic valve and plug valve, etc. Chrome

stainless steel chromium stainless steel grades have Cr, Cr by conditioning treatment, good corrosion resistance. Often used for temperature of t ℃ or less and nominal pressure PN MPa medium such as water, steam and oil or less on the pneumatic valve. Titanium stainless steel

cr-ni chromium nickel titanium stainless steel grades for CrNiti commonly used, its corrosion resistance, erosion resistance and heat resistance performance is good. Applicable to the temperature of t ℃ or less, nominal pressure PN or less. The MPa steam, nitric acid medium, such as for the pneumatic valve, pneumatic ball valve, etc.

nitriding steel nitriding steel grades is CrMoAlA, commonly used by carburizing treatment, has good corrosion resistance and abrasion resistance. Often used for temperature of t ℃ or less, nominal pressure PN MPa or less pneumatic valve plant gate. Boriding

boronizing directly by the pneumatic valve body or pneumatic valve body material processing and the sealing surface, then boronizing surface treatment, sealing surface wear-resisting performance is very good. Used in power plant sewage pneumatic valve.