A gas regulator with shutoff combines pressure regulation and safety shutoff functionality in a single device. It not only maintains a stable downstream gas pressure but can also automatically shut off gas flow in the event of overpressure, under pressure, or manual intervention.
Types of Gas Regulators with Shutoff:
- Integrated Shutoff Regulator
- Has a built-in automatic shutoff valve.
- Closes the gas flow if downstream pressure becomes too high or too low.
- Common in natural gas and LPG distribution systems.
- Manual Shutoff Regulator
- Includes a manual lever or knob to close the valve.
- Used for maintenance, emergencies, or appliance servicing.
- Overpressure Shutoff (OPSO) + Underpressure Shutoff (UPSO)
- OPSO: Cuts gas supply when downstream pressure exceeds a safe limit.
- UPSO: Cuts gas supply if downstream pressure falls too low (e.g., due to a line break or leak).
- Often found in domestic or industrial gas meters.
Key Features:
| Feature | Function |
|---|
| Pressure regulation | Keeps outlet pressure within a specified range |
| Automatic shutoff | Stops gas flow under unsafe pressure conditions |
| Reset mechanism | Manual or automatic reset after shutoff |
| Safety compliance | Meets gas safety codes (e.g., EN 334, CSA, ISO) |
| Diagnostics (in advanced models) | May include pressure indicators or alarms |
Typical Applications:
- Residential gas meters (natural gas or LPG)
- Industrial burners or furnaces
- Gas pipelines or manifolds
- Propane tanks for heaters or cookers
- Medical gas systems (with critical shutoff protection)
Advantages:
- Enhances safety by automatically cutting off gas during abnormal conditions
- Reduces risk of explosion, fire, or equipment damage
- Eliminates need for separate shutoff devices in many systems