Valve Material And Its Relationship With Operating Temperature
The main valve body materials are: C carbon steel, I 1Cr5Mo chrome-molybdenum steel, H Cr13 stainless steel, K forgeable cast iron, L aluminum alloy, P 0Cr18Ni9 stainless steel, PL 00Cr19Ni10 stainless steel, Q ductile iron, R 0Cr12Ni12Mo2 stainless steel, RL 00Cr17Ni14Mo2 stainless steel, S plastic, T copper and copper alloy, Ti titanium and titanium alloy, V chrome-molybdenum-vanadium steel, Z gray cast iron.
The operating temperature of Lined Valve is determined by the material of the valve.
Gray cast iron valve -15～250℃
Forged cast iron valve -15～250℃
Ductile iron valve -30～350℃
The maximum operating temperature of high nickel cast iron valve is 400℃
Carbon steel valve -29～450℃, the recommended operating temperature in JB/T3595-93 standard is t<425℃
The maximum operating temperature of 1Cr5Mo and alloy steel valves is 550℃
The maximum operating temperature of 12Cr1MoVA and alloy steel valves is 570℃
1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti stainless steel valves -196～600℃
Copper alloy valves -273～250℃
The maximum operating temperature of plastic valves (nylon) is 100℃
The maximum operating temperature of plastic valves (chlorinated polyether) is 100℃
Plastic valves (polytrifluorochloroethylene) -60～120℃
Plastic valve (polytetrafluoroethylene) -180～150℃
Plastic valve (natural rubber diaphragm valve) maximum operating temperature 60℃
Plastic valve (nitrile rubber, chloroprene rubber diaphragm valve) maximum operating temperature 80℃
Plastic valve (fluororubber diaphragm valve) maximum operating temperature 200℃
When rubber and plastic are used for valve lining, the temperature resistance of rubber and plastic shall prevail.
Ceramic valves, due to their poor resistance to rapid temperature changes, are generally used in working conditions below 150℃. Recently, a super-performance ceramic valve has appeared that can withstand high temperatures below 1000℃.
Glass valves. Poor resistance to rapid temperature changes, generally used in working conditions below 90℃.
Enamel valves, the temperature resistance is limited by the sealing ring material, and the maximum operating temperature does not exceed 150℃.
