Wedge gate valve adopts a solid wedge or a flexible wedge as full opening and full closing element with excellent sealing performance. There is bolted bonnet gate valve, pressure seal bonnet gate valve and forging gate valve. Globe valve adopts plug type disc as open and close element, the sealing face of disc can be flat or cone. Globe valve is suitable for cutting off and regulating the medium. There is bolted bonnet globe valve, pressure seal bonnet globe valve, forging globe valve, Y type globe valve, Angle type globe valve. Check valve is used to avoid backflow of medium to protect the pump and actuated motor from inversion. The disc of check valve is opened and closed by the medium automatically. There is bolted bonnet check valve, pressure seal bonnet check valve, forging check valve, tilting disc check valve, axial-flow check valve, wafer dual plate check valve.