The QB4 high flow electronic control valve is a closed-loop electronic pressure regulator with the ability to achieve flow rates as high as 200 SCFM forward flow and 200 SCFM exhaust flow. It can be calibrated to work from vacuum to 150 PSI or any range in between. The QB4 high flow control valve is made up of two solenoid valves, an internal pressure transducer and an electronic control circuit mounted to an integrated volume booster.

Output pressure is proportional to an electrical input command signal. Command signals come in a choice of either a differential 0-10 VDC, 4-20 mA, Serial or Ethernet. The QB4 high flow control valve also provides an electrical monitor signal for output to a panel meter or controller for data acquisition and/or quality assurance needs. The QB4 volume booster does not have stamped gaskets, special molded diaphragm or seal parts. All of the parts related to normal maintenance are standard o-rings.

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Accuracy ±


Linearity ±

Max Flow (SCFM)

Max P2 (PSI)

QB4 Downloads & Links
Documents Links Downloads
Installation Guide QB4 Repair Kit Video File Request Form: Use this form to request a file other than a standard QB4 .STEP file
Submit the form below to download QB4 .STEP File

    QB4 Technical Specifications


    Pressure Range Accuracy Linearity Max Flow
    Vacuum thru 150 PSI (10.3 Bar) ±0.4% F.S. ±0.3% F.S. 200 SCFM (5,667 LPM)
    Port Size Durability Operating Temps Filtration
    1/2″ NPT (BSPP Available) Immune to shock & vibration (up to 25 Gs) 32-158°F (0-70°C) 40 Micron


    QB4 | Internal Sense with Integrated Volume Booster

    The QB4 electronic pressure regulator with integrated volume booster is designed for industrial enviornments and can be mounted in any orientation and still provide precise pressure and/or vacuum control. Standard 1/2″ NPT inlet and exhaust ports allow for great forward and reverse flow rates. The QB4 can be controlled with a variety of command signals. Reach out and tell us about your application with the ‘Request Quote’ form below. 

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