Butterfly Valve, High Performance Butterfly Valve, Gate Valve manufacturer / supplier in China, offering UL/FM C515 Nrs Gate Valve with Wrench Nut for Piv Operation, DN150 Fire Sprinkler System Wet Type Fire Alarm Check Valves with FM, 10'' DN250FM UL 200psi Nrs Flanged Gate Valve for Fire Protection Usage with Indicator Piv and so on.