The operating temperature of the valve is determined by the material of the valve. The temperature of commonly used materials for valves is as follows:
Valve operating temperature
Gray cast iron valve: -15～250℃
Malleable cast iron valve: -15～250℃
Ductile iron valve: -30～350℃
High nickel cast iron valve: the highest operating temperature is 400℃
Carbon steel valve: -29～450℃, recommended temperature t<425℃ in JB/T3595-93 standard
1Cr5Mo, alloy steel valve: the highest operating temperature is 550℃
12Cr1MoVA, alloy steel valve: the highest operating temperature is 570℃
1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti stainless steel valve: -196～600℃
Copper alloy valve: -273～250℃
Plastic valve (nylon): the highest operating temperature is 100℃
Plastic valve (chlorinated polyether): maximum operating temperature 100℃
Plastic valve (polyvinyl chloride): maximum operating temperature 60℃
Plastic valve (polytrifluorochloroethylene): -60～120℃
Plastic valve (PTFE): -180～150℃
Plastic valve (natural rubber diaphragm valve): Maximum operating temperature 60℃
Plastic valve (nitrile rubber, neoprene diaphragm valve): the maximum operating temperature is 80℃
Plastic valve (fluorine rubber diaphragm valve): the highest operating temperature is 200℃
When rubber or plastic is used for valve lining, the temperature resistance of rubber and plastic shall prevail
Ceramic valves, because of their poor temperature resistance, are generally used in working conditions below 150°C. Recently, a super-performance ceramic valve has appeared, which can withstand high temperatures below 1000°C.
Glass valves have poor temperature resistance and are generally used in working conditions below 90°C.
The temperature resistance of the enamel valve is limited by the material of the sealing ring, and the maximum operating temperature does not exceed 150°C.
Valve body materials mainly include: C carbon steel, I 1Cr5Mo chromium molybdenum steel, H Cr13 series stainless steel, K malleable cast iron, L aluminum alloy, P 0Cr18Ni9 series stainless steel, PL 00Cr19Ni10 series stainless steel, Q ductile iron, R 0Cr12Ni12Mo2 series stainless steel, RL 00Cr17Ni14Mo2 series Stainless steel, S plastic, T copper and copper alloy, Ti titanium and titanium alloy, V chromium molybdenum vanadium steel, Z gray cast iron.
Post time: Dec-06-2021