We are (Sino-US Joint Venture )Zhejiang Poro Valve Manufacturing Co., ltd. Our company is a qualified valve-producer in Wenzhou city- the well know valve manufacturing base of China . Covering a total production area of 23186 square meters. PORO has three production centers, namely cast steel valves, forged steel valves and special valves. PORO has been successively approved DNV ISO9001:2000 quality system, AZ safety certification for pressure vessels, API certification and CE safely certification.We specialize in manufacturing "PORO" -branded gate valves, globe valves, check valves, power station valves, vent valves, control valves and butterfly valves and also flange , strainer .contact us :*****