ISQB Pressure Regulator

ISQB Pressure Regulator

The ISQB is a legacy part. Please see the ISQBX for the newest version.

The ISQB control valve is an electronic pressure regulator designed to precisely and proportionally control the pressure of gases based on an electronic signal.

  • Full vacuum to 150 PSI (10.34 Bar)
  • Flows up to 0.8 SCFM
  • FM approved and rated intrinsically safe for hazardous locations (see below for complete classification)

The FM Approved Intrinsically Safe ISQB operates using two normally closed solenoid valves, a pressure sensor and a control circuit. One valve is actuated to allow unregulated supply media into the system. The second valve actuates to allow working media to vent to atmosphere. The pressure sensor provides feedback to the control circuit. The control circuit compares the pressure sensor feedback to the user supplied electronic command signal and actuates the appropriate valve until the two signals match.

Accuracy ±
Repeatability ±
Max Flox (SCFM)
Max Ps (PSI)
  • Technical Specs
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Technical Specs

Pressure RangeVacuum thru 150 PSI (10.3 Bar)
Accuracy±0.5% F.S.
Repeatability±0.5% F.S.
Max Flow0.8 SCFM (23 LPM)
Port Size1/8″ NPT (BSPP Available)
DurabilityImmune to shock & vibration (up to 25 Gs)
Operating Temps32-104°F (0-40°C)
Filtration40 Micron


ISF Series

ISQB | Intrinsically Safe

The ISQB is a complete closed-loop system consisting of valves, manifold, housing and electronic controls. The ISQB is an intrinsically safe valve and Factory Mutual (FM) approved for Class I, II & III; Groups C, D, E, F & G. Available in a 4-20 mA differential command signal, the ISQB can be mounted in any of the above hazardous locations and installed with approved barriers (see Installation Guide for more information).

NOTE: End user must determine fitness and suitability of the ISQB control valve for their application. The ISQB requires the use of Intrinsically Safe Barriers.