ISQBF
The ISQBF control valve is an electronic pressure regulator designed to precisely and proportionally control the pressure of gases based on an electronic signal. The ISQBF is an FM approved and rated Nonincendive valve designed for hazardous locations (see below for complete classification).
The FM Approved nonincendive ISQBF 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. The ISQBF nonincendive pressure regulator is potted on the inside. This allows for the direct control of hazardous media such as methane and natural gas.
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Accuracy ±
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Repeatability ±
Max Flow (SCFM)
Max P2 (PSIG)
ISQBF Downloads & Links
| Documents | Links | Downloads |
| Installation Guide | Hazardous Location Product FAQ | File Request Form: Use this form to request a file other than a standard ISQBF .STEP file |
| Hazardous Location Product Brochure | ISQB-Series | Submit form below to download ISQBF .STEP File |
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ISQBF Technical Specifications
| Pressure Range | Accuracy | Repeatability | Max Flow |
| Vacuum thru 150 PSI (10.3 Bar) | ±0.5% F.S. | ±0.5% F.S. | 0.8 SCFM (23 LPM) |
| Port Size | Durability | Operating Temps | Filtration |
| 1/8″ NPT | Immune to shock & vibration (up to 25 Gs) | 32-104°F (0-40°C) | 40 Micron |
ISQBF | Nonincendive
The ISQBF nonincendive valve is rated by Factory Mutual (FM) and approved for specific hazardous locations in Classes I, II, Division 2, Groups C, D, E, F and G with an Intrinsically Safe process connection for Class I, II, III Division 1, Groups C, D, E, F, and G hazardous (classified) locations with an ambient temperature rating of -25°C to +40°C. The ISQBF may be used with any non-corrosive compressible media compatible with the wetted materials.
Special Condition for Use:
1. With Intrinsically Safe Process Connections. Intrinsically safe process connections refers to process connections that under any condition of installation or operation will not change the nature of the hazardous (classified) area from a division 2 to a division 1 location.
NOTES: End user must determine fitness and suitability of the ISQBF control valve for their application.
The ISQBF nonincendive pressure control valve is available with two supply voltage options:
- Option P1 = 12 VDC (11 to 14.5 VDC Max)
- Option P2 = 15-24 VDC (13.5 to 29 VDC Max) – standard
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