Proportion-Air, Inc. is the world’s leading manufacturer of electronic pressure control valves, which allow you to convert an electronic input signal into a precisely controlled pressure output. Our regulators provide pressure control that is reliable, repeatable, and accurate. We often custom build our systems to address the unique parameters of your particular application. Proportion-Air closed loop mass electronic air flow control valves also have quick response and control air flow rates from SCFH to 250 scfm. Install our air piloted regulators (also called volume boosters) for high pressure, high flow, quick relieving, and ratio operation. Proportion-Air also manufactures and supplies pneumatic control valve accessories such as DC power supplies, analog command modules, mounting brackets, and power cords. We are leaders in the field, offering innovation in design, engineering, and product implementation for today’s aircraft, trucks, cars, and locomotive technology. Our engineers also designed key components for a recent Space Station project.Phone : 317-335-2602Email :

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