There are several different types of gas regulators, and their uses are often dependent upon their type. Single-stage regulators are designed for short-term gas-related applications. The pressure at the outlet of the regulator is set to a single pressure setting, which may be difficult to control. Dual-stage regulators maintain a higher pressure throughout the entire working range.

The operation of a gas regulator involves three basic parts. The loading mechanism determines the delivery pressure, which is usually a spring. The sensing element senses pressure on the downstream side of the regulator and adjusts the inlet pressure accordingly. A regulator can also sense atmospheric pressure. Depending on what it senses, this can help adjust the pressure on either side of a gas line. By regulating pressure, regulators prevent overheating.

Pressure reduction
A gas regulator can function as a back-pressure or pressure-reduction device when the inlet pressure is too high for the downstream equipment. Pressure-reduction regulators are installed either parallel to or after the sensitive equipment. During installation, ensure that the regulator has an inlet pressure that is at or below the desired level. The lower the inlet pressure, the more SPE the regulator will have. Typically, SPE is measured as a percentage.

Pressure reducing regulators are used in industrial applications. Oil and gas producers use pressure-reduction regulators in natural gas compressors. They are also used to control pressure in fuel and instrument gas supplies. They are also referred to as pressure-control valves. A pressure reducer is a type of regulator that reduces gas pressure, and the smaller one is called a "Little Joe" regulator. These types of regulators are a versatile solution for any application that calls for pressure regulation.

Installation
Proper installation of gas regulators is vital for safety. Proper location of regulators is crucial to prevent leaks, which may lead to property damage. Vent pipes are required to vent the cylinder. They should be positioned away from window openings and other sources of moisture and foreign materials. Regulators must be mounted on a concrete pad or non-plastic structure. A pressure gauge should be used to monitor regulator pressure. If the regulator is positioned on a milk crate, it may not function properly.

Proper installation of gas regulators should include several factors. It should be installed at both the inlet and outlet of the regulator. Moreover, it should include gauge petcocks to monitor the performance of the regulator. It should also have venting in order to allow the diaphragm to breathe and provide a leak path to the atmosphere.