QB3H High Pressure Valve

QB3H High Pressure Valve

The QB3H high pressure valve is ideal for applications requiring high pressures and high flows or constant flow, especially in laser cutting applications that use oxygen.

  • Full vacuum to 500 PSI (34.47 Bar)
  • High forward and relief flows up to 50 SCFM (1416 LPM)
  • Aluminum bodies standard; all brass body units oxygen cleaned for direct control of O2

The QB3H features two solenoid valves that add or subtract pressure to the pilot of an integrated volume boosting regulator. An internal stainless steel pressure sensor measures the high pressure output of the integrated volume booster and sends this signal to the on-board controller. This controller then modulates the two solenoid valves to match the integrated volume booster’s output pressure to the user requested command signal.

Accuracy ±
Repeatability ±
Max Flow (SCFM)
Max P2 (PSI)
  • Technical Specs
  • Downloads & Links
  • Request Quote

Technical Specs

Pressure RangeVacuum thru 500 PSI (34.7 Bar)
Accuracy±0.5% F.S.
Repeatability±0.2% F.S.
Max Flow50 SCFM (1416 LPM)
Port Size3/8″ NPT
DurabilityImmune to shock & vibration (up to 20 Gs)
Operating Temps32-158°F (0-70°C)
Filtration40 Micron


File Request Form: Use this form to request a file other than a standard QB3H .STEP file

Submit the form below to download a standard QB3H .STEP File

Request Quote

QB3H | Internal Sense

The QB3H is a complete closed-loop pressure control device consisting of valves, manifold, housing and electronic controls. Pressure is controlled by the use of two solenoid valves that increase, decrease or hold pressure to the top of a diaphragm integrated as a volume booster inside the QB3H. This volume booster allows for flows up to 50 SCFM. The QB3H was designed specifically for the laser cutting industry, where it still reigns supreme. However, the ruggedness and dependability of the QB3H allows it to be very successful in numerous applications. It works great in static or dynamic conditions and it can be O2 cleaned for the direct control of oxygen.