Gate Valves, Brass Ball Valves, Check Valves manufacturer / supplier in China, offering CE BS Brass Medical Gas Pipeline Check Valves for Hospital, 1/2" 34" 1" 2" 600 Wog Two-Piece Full Port NPT Thread Bronze Brass Ball Valve with Yellow Handle, Adjustable High-Flow Medical Oxygen Regulator Stainless Steel Construction ISO 13485 Compliant and so on.