QBX Low Pressure Valve Series

Brand: Proportion-Air, Inc

The QBX pressure control valve is a closed-loop electronic air pressure regulator designed to work in almost any environment.

The QBX can be calibrated to any pressure range from full vacuum up to 175 PSI. This device can be configured to accept a variety of analog and digital command signals and it comes standard with an analog monitor out signal for data acquisition.

The QBX electronic pressure control valve may not be the lowest (upfront) cost option you have. However, the ruggedness and durability of the QBX makes it the lowest cost option in the long run, by far.

Tested to almost 1 billion cycles, the QBX can last a very long time without the need for re-calibration and maintenance.


Pressure Range

  • Vacuum thru 175 psi (12 bar)


  • ± 0.2 % of Full Scale


  • ± 0.02 % of Full Scale

Maximum Flow

  • 1.2 scfm (34 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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