China, Ductile Iron, Cast Iron, Dual Plate, Double Plate, Wafer, Flange, Lugged, Check Valve, Manufacture, Factory, Price, RF, RTJ, trim 1, trim 8, trim 5, PTFE, Viton, Metal, seat, valves materials have carbon steel, stainless steel, A216 WCB, A351 CF3, CF8, CF3M, CF8M, A352 LCB, LCC, LC2, A995 4A. 5A, A105(N), F304(L), F316(L), F11, F22, F51, F347, F321, F51, Alloy 20, Monel, Inconel, Hastelloy, Aluminum Bronze and other special alloy. Pressure from Class 150LB, PN10, PN16, JIS 10K, JIS 5K