Pressure regulating valve

A pressure regulating valve, also known as a pressure reducing valve, controls the pressure of a fluid or gas to a desired value by negative feedback from the controlled pressure.

Regulators can act on gases and liquids and can be an all-in-one device with a pressure setting, restrictor, and sensor, or can consist of a separate pressure sensor, controller, and flow valve.

The primary function of a pressure reducing regulator is to match the flow of gas through the regulator to the gas demand placed on it, while maintaining a sufficiently constant output pressure. If the load flow decreases, then the regulator flow must also decrease. If the load flow increases, the regulator flow must increase to prevent the controlled pressure from decreasing due to a gas shortage in the pressure system. For a wide range of flow rates, it is desirable that the controlled pressure does not vary much from the set point, but it is also desirable that the flow through the regulator is stable and that the controlled pressure is not subject to excessive oscillations. Common pressure reducing valve sizes are half inch, 3/8 inch, 1/4 inch, 1/8 inch.

Pressure reducing regulators are widely used, mainly in aerospace, cooking, automotive, mining and other industries.

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