Term pressure regular may also be interchanged with the names pressure-reducing valve or a pneumatic regulator. These regulators serve the role of controlling and maintaining a constant pressure output from a compressed air system.
Without the use of a pressure regulator, there would be constant increases and decreases in the pressure from the compressor and through the system. They can also be used on the input side of the compressor unit as well as the outlet side.
Unlike a valve that is either open or closed or set to a specific level, a pneumatic regulator is designed with the ability to sense, actuate and control the regulator functions to provide this consistent pressure level.
There are three basic types of pressure reducing valves. These include general use regulators, which are used widely in applications where exact pressure requirements are not needed. This is not to say they are not accurate in the pressure control, but rather they operate within a high and low-pressure range.
A precision pneumatic regulator is designed with a much lower pressure range. This is important when the pressure needs to remain in a very tight high and low range for the regulator. Sensitive types of equipment and applications often require these precision types of regulators.
The third option is a special purpose regulator. These are not always pneumatic and may be designed to work with other types of liquid or fluid media. These are typically found in industrial types of applications and equipment, and they are often customized to the specific application.
Choosing the specific type of pressure-reducing regulator is a factor of normal pressure, pressure extremes in the system, the pipe size and the range of sensing, actuation, and control needed throughout the system. It is also important to consider the operating conditions, as this is essential in selecting a regulator that will have a long life cycle in the given application.