GX Pressure Valve Series

Brand: Proportion-Air, Inc

The GX high pressure valve is a complete re-design of Proportion-Air’s successful GP product. With this re-design we greatly improved the accuracy, resolution and repeatability of our high pressure control valve.

The GX high pressure valve is 50% less weight (with non O2 cleaned GX) than the GP. The GX can also be used to pilot a volume booster and achieve much higher flows with the same great accuracy.

The GX-series high pressure valve has several other unique and beneficial features. An on-board split power supply allows true zero for command and monitor even though the GX is powered by a conventional single ended power supply.

The GX-series utilizes advanced on board power management hardware to minimize current draw and heat build up.

The GX can be paired with a variety of high pressure volume boosters for even greater flow. When using a volume booster, the GX2 can be used to achieve accuracy similar to the GX1.


Pressure Range

  • Vacuum thru 1000 psi (70 bar)


  • ± 0.25 % of Full Scale


  • ± 0.15 % of Full Scale

Maximum Flow

  • 26 scfm @ 1,000 psi (736 LPM)

Port Size

  • 1/8″ NPT (BSPP Available)


  • Immune to Shock & Vibration (up to 20 Gs)

Operating Temperature

  • 32° to 158° F (0° to 70° C)


  • 40 micron


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