... for LP-gas (propane) and NH3 1.Max. Working Pressure: 1.8Mpa, 2.5Mpa, 2.Thread: ZG1/4" 3.safety pressure valv Safety ... valve for LP-gas piping, dispenser, LPG station ... full dicharge capacity, reducing excess perssure quickly for protecting the dispener, system.This is a ... the relief valve is fully open.Safety valve for LPG dispenser . Rogo design. LP-gas ...