Proportion-Air, Inc.

Proportion-Air is the world's leading manufacturer of electronic air pressure and air flow rate control valves and regulators. Each product is custom made to your specifications after sharing your needs directly with our applications staff. Our competition builds thousands of products to fill their catalogs. Proportion-Air builds only electronic pressure and flow controls, built thousands of ways to meet each customer's exacting requirements.


Electronic pressure control valves:


Proportion-Air designs and manufactures pneumatic control valves for the most demanding applications: low pressures (0-2 inches H2O), high pressures (0-69 bar), high flow rates (0-85000 slpm), high resolution (+/-0.005% of full scale), shock and vibration resistant up to 25 G's, tolerant of condensates and lube oils, oxygen clean and oxygen compatible, vacuum calibrations, vacuum through positive pressure calibrations, and absolute pressure calibrations. Proportion-Air offers most products in a single loop model More... where output pressure is closed loop around an internal pressure sensor. Many products are offered in two loop models where a second external feedback sensor can be used to correct for hysteresis in pressure regulation for higher accuracy. Nearly any pressure and flow can be achieved and controlled when we introduce pilot-operated regulators.


 Electronic mass flow control valves:


 Proportion-Air manufactures an industrial quality mass flow transducer for air and inert gases. Flow is calculated based on differential pressure across an internal venturi. This pressure based flow makes the F-series flow transducer very fast (<10mS). The F-series converts flow rate into an electronic signal that may be directly used to measure flow rates electrically. The F-series is also used as a feedback signal to Proportion-Air pneumatic control valves to create a closed loop mass flow control package. Packages are available as low as 2-20 scfm (0.9-9.4 slpm) and as high as 25-250 scfm (708-780 slpm).


 Two other brands make up the Proportion-Air family:


 Burling Valve brand direct-acting and dome-loaded pressure regulators are designed for the process industries. All Burling Valve process regulators and valves are made in the USA and offer free application support, quick quotes, great lead times and custom engineered solutions. Back pressure, pressure reducing, differential and negative-bias regulators are all available.


 Protect-Air USA miniature safety regulators operation of pneumatic tools and compressed air systems. All Protect-Air products are intended to increase efficiency, protect employees, protect equipment and ensure cost saving production throughout all levels of the manufacturing environment. Our number one consideration is to offer customers added value through broad and deep product lines, knowledge, processing and world class customer service.

Fabri-Tech Inc.

Fabri-Tech Inc manufactures quality custom-engineered products and other specialty items for industry, as well as many innovative equine products. Fabri-Tech has been a dependable supplier to the OEM market and Equine Industry for more than 37 years.

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Solutions spécialisées et distribution

Fournisseurs au (McCordsville)

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