Pneumatic valve sealing surface or lining material in common use and conditions of use

sealing ring material with metal and nonmetal two categories
pneumatic valve seal materials in common use and conditions of use are as follows: non-metallic categories:

, ptfe, code F
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.
, synthetic rubber, code X
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, code N
nylon has a small friction coefficient, good corrosion resistance, etc. Nylon for temperature of t ℃ or less and nominal pressure of PN MPa or less pneumatic ball valve, globe pneumatic valve, etc.
metals:
, babbitt, code B
t - babbitt used in temperature ~ ℃, nominal pressure PN or less. MPa ammonia as a pneumatic valve.
, chromium stainless steel, chromium code H
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.
stainless steel, titanium, chromium nickel chromium code R
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.
, copper alloy, code T
- for copper alloy are 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.
and boriding steel, code P
boriding steel directly by the pneumatic valve body or pneumatic valve body material processing and the sealing surface, then boronizing surface treatment, sealing surface