China, API 6D, twin seal, orbit, dual expanding, DBB plug valve, General valve, Manufacture, Factory, Price, Flanged, RF, RTJ, Two pieces, three pieces, PTFE, RPTFE, Metal, seat, full bore, reduce bore, high pressure, high temperature, valves materials have carbon steel, stainless steel, A216 WCB, A351 CF3, CF8, CF3M, CF8M, A352 LCB, LCC, LC2, A995 4A. 5A, Alloy 20, Monel, Inconel, Hastelloy, Aluminum Bronze and other special alloy. Pressure from Class 150LB, 300LB, 600LB, 900LB, 1500LB, 2500LB