Gate Valves, Brass Ball Valves, Check Valves manufacturer / supplier in China, offering Two-Piece Copper Medical Gas Ball Valve for Oxygen Service 1-1/2", 2 3 Piece 600 Psi Wog Copper K-Tube Brass Medical Gas Isolation Shut-off Ball Valve with Extensions Oxygen Cleaned Lockable Line Pipeline Valve Stop/Globe/Check, American Standard Chemetron Hospital Oxygen Supply Wall Mounted DIN Standard Medical Wall Mounted Gas Outlet and so on.