Proportion-Air, Inc.
Automation Machinery ManufacturingIndiana, United States51-200 Employees
Proportion-Air, Inc. designs and manufactures electronic air pressure regulators and flow control valves that enable precise regulation of pneumatic pressure. Founded in 1985 by Daniel E. Cook to commercialize a distinctive regulator, the company emphasizes accepting a range of analog and digital signals to achieve accurate control while reducing sensitivity to vibration, mounting position, and environmental factors. It operates in the automation machinery manufacturing sector, focusing on robust performance for harsh industrial settings and a broad pressure range that encompasses vacuum, positive pressure, and absolute pressure, up to high-regime applications. The company’s dual-loop technology supports closed-loop control using multiple downstream sensors to manage different processes.