We supply high quality Hispeed® Ductile Iron Pressure Relief Valve.The HISPEED® Ductile Iron Pressure Relief Valves limit inlet pressure by relieving excess pressure and prevent pipe line pressure from rising to maximum.The Ductile Iron Pressure Relief Valves are designed for installation in the water supply connection to sprinkler, deluge, foam systems, or standpipe fire protection systems.The Ductile Iron Pressure Relief Valve features a flange or a groove, easy installation and accessibility. We are expecting to become your long term partner in China.