QB4 High Flow Control Valve | Electronic Pressure Regulator

The QB4 high flow 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 integral 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 is fast and repeatable –

QB4 high flow control

  • Pressure Range: Vacuum thru 150 PSI (10.3 Bar)
  • Accuracy: ±0.4% F.S.
  • Max Flow: 200 SCFM (5,667 LPM)
  • Port Size: 1/2″ NPT (BSPP Available)
  • Durability: Immune to shock & vibration (up to 25 Gs)
  • Operating Temps: 32-158°F (0-70°C)
  • Filtration Recommended: 40 Micron
  • Protection Rating: IP65
  • Oxygen Compatible: Yes

It is the actual work pressure that is sensed and fed back to the control circuit so any mechanical inaccuracies or hysteresis of the air piloted volume booster is automatically compensated for allowing for extraordinary accuracy and repeatability. The volume booster does not have stamped gaskets or special molded diaphragm or seal parts. All of the parts related to normal maintenance are standard o-rings.

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