Page 78 - PNEUMATIC SYSTEM INSTRUMENT

PRESSURE CONTROL VALVE

A pressure regulator is responsible for preventing pressure fluctuation

by controlling pressure as it is coursed through an actuator or another

part of a pneumatic system. In order to air pressure within an

appropriate pressure range, the pressure should be set low enough so

that it can fluctuate between 3 and 5 psi without altering the

minimum and maximum pressure system requirements. In certain

applications, a pressure regulator valve must ensure that air-pressure

output stays at a constant regardless of changes in pressure at earlier

points in the system and changes in flow. Other applications require

pressure regulators to lower pressure so that air is not wasted while

still meeting the basic pressure requirements of the device.

Pressure regulators work with sensors to monitor the pressure as it

expands as it moves through a pneumatic system. Once the pressure

has reached the maximum level of expansion, a sensor is triggered by

the high pressure, which in turn signals to the pressure valve to close

thus cutting off pressure.

As a result of the pressure valves opening and closing in response to

pressure levels, pressure is kept at a relatively constant level as it

reaches the actuator or other pneumatic device.

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