Proportional Valves, Pressure and Flow Controllers
Miniature Pressure & Flow Controllers
Electronic Pressure Control (EPC) technology offers a simple, low cost alternative to mass flow control or manual pressure control by providing precision closed-loop control of pressure, vacuum and flow. By integrating thermally compensated proportional valves, digital valves, pressure sensors and control circuitry into a stand- alone module, Parker EPC systems can improve instrument performance, reduce gas consumption, and eliminate costly manual 'drift' adjustments.
Electronic Proportional Control Valve
The Porter Model EPC Electronic Proportional Control Valve is an electromagnetically-actuated, proportional control valve designed for use in closed loop flow or pressure control systems. When coupled with a flow sensor or pressure transducer and a proportional electronic controller, Model EPC is capable of providing steady and precise control of gas flow rates or pressures. The Model EPC is a DC-driven, normally-closed valve which includes an elastomeric valve seat to provide bubble-tight shut-off. A broad range of flow coefficients (Cv’s) is available for either flow or pressure control.
Electronic Pressure Regulators
Porter models 415 and 425 electronic pressure regulators combine the proven Porter EPC proportional control valve with an integrally-mounted pressure sensor and the necessary electronics for self-contained closed-loop pressure control. Models 415 and 425 permit regulation of forward and back pressures respectively. The controlled pressure is established by a user-applied 0-5 Vdc setpoint voltage. The exclusive absolute zero (ABZ) feature allows the pressure signal to be essentially clamped at zero for signals less than 1.5% full scale, which in turn forces the control valve closed. ABZ minimizes the zero drift effects due to temperature variation and guarentees the control valve will not open for setpoint values less than 1.5% full scale. When pressure is adjusted to greater than 1.5% full scale, the pressure signal is enabled and calibrated accuracy is achieved. The ABZ feature may be disabled by means of a control input at the electrical connector.
Miniature Proportional Valves
Medical and analytical OEMs around the globe choose Parker Precision Fluidics patented thermal compensation miniature proportional valve technology for the most demanding precision gas flow applications. When performance, quality and reliability are critical to your instrument, go with the proportional valve professionals, Parker Precision Fluidics Division.