High Pressure Valves & Electronic Regulators

Electronically controlled high pressure valves from Proportion-Air will accurately control pressures to 1000 PSI. The GX-Series high pressure control valve accomplishes 1:1 direct pressure control, without the need for a mechanical ratio amplifier. This results in much better accuracy and repeatability.

The GX-Series can also pilot operate a volume booster (pilot operated regulator) when high flow rates are needed. Pressures above 1000 PSI are achieved by pilot operating a ratio regulator. In theory, any pressure and flow is achievable in this configuration. The GX offers accuracy up to ±0.25% of full scale calibration and repeatability of ±0.15%

0 to 1000 PSI control is accurate to ±2.5 PSI

and repeatability within ±1.5 PSI

Normally, pilot operating ratio regulators results in a severe accuracy (high hysteresis) penalty. Proportion-Air utilizes an external pressure transducer to close the loop around the actual output pressure of the ratio regulator. This results in a complete high accuracy, high pressure package capable of the same accuracy and repeatability as the pilot unit itself. See our High Pressure Control Brochure

High Pressure Valves

These high pressure valves control the below pressures directly. We can control much higher pressures with ratio regulators. Please contact us if your pressure range is higher than stated below.


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The QB3H (electronically controlled) high pressure valve was originally designed for laser cutting with Argon, Nitrogen, Oxygen and air. The QB3H continues to be very successful in this application, but it is now used across multiple industries and processes to control high pressure with high flows in compact spaces. This model offers 1:1 pressure control up to 500 PSI while achieving flows up to 50 SCFM.

Proportion-Air’s QBS model is available with Stainless Steel or Aluminum manifold. This device is a small and compact high pressure valve designed for static applications. It offers accuracy up to ±0.5% of full scale calibration. Fast response time and extreme durability, the QBS withstands the test of time in industrial applications.

What Our Customers Say

  • What an excellent process you have for specifying parts for your customers. I am very impressed.

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Product Catalog & How to Order Guide

Proportion Air Family Brochure
How To Order Guide

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