When it comes to gas appliances, a low pressure gas regulator is a great way to keep the flame a consistent and manageable level. This device is easy to maintain, replace and repair if it becomes damaged. It's not hard to find a variety of products from which to choose. The best thing about choosing a regulator is that it's often rated for a very low inlet and outlet pressure.

A gas regulator is a complex piece of equipment, incorporating three main components. These include a control element, a sensing element and an expulsion mechanism. Some regulators also incorporate a built-in filter, but in most cases, you will have to install it upstream from the regulator. If you don't do it right, it can lead to a leak in the outlet port. You should never connect a gas supply to a regulator that has a higher inlet pressure than the output pressure rated for your appliance.

The sensing component is typically a diaphragm, which moves upward as controlled by a set spring. The control element is a small, plastic valve that reduces the inlet pressure, thereby lowering the outlet pressure. Typically, a dual stage regulator incorporates the first and second stages, allowing for the combination of high and low pressures in the same system. Usually, the poppet valve is a thermoplastic seal.

Although the inlet and outlet pressures of a low pressure regulator aren't regulated, they are a good indication of what the regulator is capable of. Low pressure regulators are usually rated to handle a psi of less than 150 psi. They may be used to lower the pressure of gas delivered into a vacuum process.