China, Pneumatic, Actuator, Control, Ball Valve, manufacture, factory, price, SDV valve, single, double, action, body in two pieces and three pieces, Flanged, RF, FF, RTJ, NPT, valve bore in reduced and full bore. valves materials have A216 WCB, A351 CF3, CF8, CF3M, CF8M, A352 LCB, LCC, LC2, A995 4A. 5A, Inconel, Hastelloy, Monel and other special alloy. Pressure from Class 150LB to 2500LB.