we can supply series of safety valve Here are brief introduction of our company: THE SNPN MACHINERY FACTORY is specializing in manufactuary of pneumatic，including Safety Valve、Non-return valve、ball valve、Series of Pressure Regulating Valve and so on. Our company located in YUHUAN county,Zhejiang province as ＂the capital of valve in china＂We established in 1992 ,we have more than 300 staff and the total value more than 50 million RMB this year.