Gas Trains For Pressure Reducing System
A gas train consist of Filter, Slam-shut off valve, pressure regulator, safety relief valve & flame arrestor. Filter helps to remove the dust/dirt particles in the gas which may damage the regulator parts. The slam-shut off valve normally remains open. Incase the outlet pressure of the regulator exceeds the permissible limits, the slam-shutoff valve senses it through the impulse line & instantly shuts off the supply to the downstream system. The safety relief valve?s provided for additional safety. It is to be set at higher pressure than the slam-shut off valve pressure so that the safety relief valve will operate only when slam-shut off valve fails to operate. The outlet of the safety relief valve is vented well above the root through the flame arrestor.