A natural gas regulator works to maintain the fuel at constant pressure as per the recommendation of the burner manufacturer. It is a valve that automatically cuts off the flow of gas at a specific pressure. It works in two steps, the first being pressure reduction, and the second being pressure regulation.
The three functional units that make up a pressure regulator include a poppet valve that is a pressure-reducing element, a diaphragm that is a sensing element and the spring, which is a reference force element.
Natural gas applications require the use of a regulator, as the pressures can fluctuate significantly. The gas utility company provides natural gas to homes through a wide network of pressurized pipes. The source needs to provide high pressure to push the fuel through the network. The high-pressure gas that reaches a home requires a reduction in pressure to a level that is compliant to the application. The regulator has an internal valve mechanism that reduces the pressure.
The gas received in homes has fluctuating pressures. The natural gas regulator senses the gas pressure and then normalizes it by adjusting the spring valve to produce a constant flow of gas. It achieves this by a mechanical setup between the spring valve and the diaphragm chamber filled with the gas from the outlet.