Accurate. Repeatable. Customizable. Helping our customers get exactly the right pneumatic product to achieve their goals every time is our priority.

Proportion-Air’s core focus is manufacturing accurate and repeatable proportional electronic air pressure regulators and electronic flow control valves. Our customization options mean that you’ll get the exact unit you need for your application to achieve peak performance. We back up our pressure regulators and control valves with a team of experts who are ready to answer your questions, whether it’s your first time with a pneumatic application or if you’ve been in the business for decades.

Our specialties include low pressure (as low as 0 to 2 inches of water column), high resolution (to ±0.005%), high pressure (1,000 PSI in 1:1 direct configuration and 10K+ in ratio configuration), vacuum, and vacuum-through-positive applications.

Our team of knowledgeable experts is easy to reach. Phone, email or try the ‘Request Quote’ button above. We strive to offer quotes in less than 6 hours of understanding your needs.


Electronic Pressure Regulators

As low as 0-2 inches of water column to 5,000 psi +Learn More

Mass Flow Control Valves

Closed-loop electronic mass flow controllers that control flow rates from 2 SCFH to 250 SCFMLearn More

Pressure Transducers

Accurately measure the pressure of gases and/or fluids in industrial and laboratory processesLearn More