Being the global leader in proportional electro-pneumatic pressure and flow control, these three words – accurate, repeatable, customizable – are what set us apart from our competition. We focus on meeting your exact needs for precise, repeatable control and build a proportional pressure or flow device to match them.

And we make it possible to go beyond “global” – Our clients in the aerospace industry can tell you how integral our products are for leaving our atmosphere.

Proportion-Air, Inc. began as a manufacturer of proportional electronic air pressure regulators and air flow control valves. The company was founded in 1985 by corporate president Daniel E. Cook to capitalize on the sales and marketing prospects of the unique invention of an electronic air pressure regulator.

This air pressure device was designed to accept a variety of electronic analog and digital signals in order to control pneumatic pressures with extreme accuracy while negating the effects of vibration, mounting position or environmental concerns.

Today, our family of brands includes Burling Valve industrial process regulators and Protect-Air USA miniature safety regulators and air fuses.

Proportion-Air offers a large family of electronic air pressure regulators and air flow control valves that allow you to select the best product to match your exact application requirements. Whether you have specific package dimensions, housing requirements or an uncommon electrical interface, Proportion-Air has a product family to match your application.