ASME-Code Fast-Acting Pressure-Relief Valve for Air, Test Ring, Brass Seal, 1/4 NPT, 3-1/8" HighASME Code Fast Acting Pressure Relief Valve for Air, Test Ring, Brass Seal, 1 4 NPT, 3 1 8" High Valve Function Pressure Relief For Use With Air, Inert Gas Activation Pressure Driven Inlet Pipe Size 1 4 Connection Type Pipe Pipe Connection Type Threaded Connection NPT Male Location Bottom Maximum Pressure 300 psi Relief Port Connection Type Vent Relief Port Location Side Set Pressure Configuration Nonadjustable Temperature Range 40 to 400 F Valve