Cast Iron Valve, Cast Steel Valve, Ball Valve manufacturer / supplier in China, offering UL FM Ductile Iron Cast Iron Grooved Pipe Fittings Mechanical Cross Threaded Outlet, China-Factory-Manufacturer UL/FM/CE Fire-Protection Ductile Iron Grooved Pipe Fitting Flexible Coupling, Ductile Iron Grooved Couplings 11.25 45 90 Degree Elbow for Fire Fighting System and so on.