You can rest assured to buy customized Hispeed® 300PSI Pressure Relief Valve from us. We supply 300PSI Pressure Relief Valve.The Pressure Relief Valves limit inlet pressure by relieving excess pressure and prevent pipe line pressure from rising to maximum .The Pressure Relief Valves are designed for installation in the water supply connection to sprinkler, deluge, foam systems, or standpipe fire protection systems.The Pressure Reducing Valves features a Class 125 flange or a groove, easy installation and accessibility. We are expecting to become your long term partner in China.