EPC Electronic Pressure Controller

The EPC is a high resolution digital pressure controller with integrated microcontroller for controlling air or inert gas for a variety of applications and is recommended for use in controlling the pilot reference pressure for Equilibar dome-loaded back pressure regulators and vacuum regulators. It provides a regulated output pressure proportional to an electrical command signal input and controls in a range of calibrated pressures up to 150 psig / 10 bar(g).

The EPC comes standard with 0 -10 VDC signal command and can be configured instead for 4-20 mA differential or 3.3V serial digital command signals. It is a complete closed loop control valve consisting of two internal solenoid valves, a manifold, an electronic control circuit board, and a pressure transducer all contained in a protective IP65 rated housing. Models are available to control gauge pressure, vacuum and absolute pressures and CE models are available.

All models are designed for use with air or inert gases in non-hazardous/non-explosive environments. For information about ATEX rated controllers, please contact us.

If you are looking for a high resolution digital pressure controller for a higher pressure range, above 150 psig / 10 bar(g), please visit the EHP product page. 

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Standard: 1/8″ NPT female

The EPC is a dual proportional valve design.  One solenoid valve functions as inlet control allowing supply media into the system to increase the controlled pressure. The second solenoid valve acts as the exhaust and will decrease the controlled pressure by venting to atmosphere. The inlet solenoid valve operates in a proportional manner to the current supplied by the EPC’s electronic control circuit.

The ability to vary the inlet solenoid valve orifice opening in an analog fashion allows the EPC to control pressure with extremely high resolution. The proportional action of the inlet solenoid valve allows the EPC to accurately maintain pressure even when there is a low flow rate due to leaks in the system or other gas consumption. The exhaust solenoid valve also opens proportional to the control circuit current output. This infinitely variable response allows the pressure to be decreased seemessly in your system.