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Performance regulation Valve material:Malleable cast iron、Carbon Steel、Stainless steel Seal ring material:Caoutchouc(NR)-20~+85℃ Ethane propyl rubber(EPDM)-40~+125℃ Styrene rubber(NBR)-20~+82℃ Silicon rubber(SI)-70~+150℃ Fluorine rubber(FPM)-23~+150℃ Neoprene(CR)0~+80℃ Butyl (IIR)-40~+100℃ PTFE +10~+150℃ Standard and regulation The flange standards:GB/T17241.6-98; GB9115-88 Face-to-face-dimension:GB12221-89 Test Pressure:GB/T13927-92; Applicable medium:Air, water, sewage, steam, coal gas, oil |