Shanghai Weiliu Mechanical Equipment Co., Ltd. is a manufacturer of adjusting valve, air-operated valve, blower regulation valve, control valve, excess flow valve, electric control valve, ball valve, gate valve, globe valve, check valve, butterfly valve for gas flue inline pump, chemical pump, gear pump, diaphragm pump and self-priming pump with well-equipped testing facilities and strong technical force. With a wide range, good quality, reasonable prices and stylish designs, our products ...