FireBag® Thermal-activated Shut-off Device for Natural Gas & Propane Metering Applications
The FireBag® automatically shuts off the gas supply in the event of a fire, preventing gas from fueling flames and greatly reducing risks for occupants and first responders.
When the FireBag sensor reaches its activation temperature of 203°F–212°F, a metal alloy melts, releasing a closure plug that forms a permanent gas-tight seal. The device closes within 60 seconds, meeting international DIN 3586 Thermal Shutoff Standards, and remains sealed throughout the fire and after cooling, eliminating downstream gas flow.
The FireBag requires no electronics, batteries, or routine maintenance during its service life. Once activated, it must be replaced to safely restore gas service.
This simple, inexpensive device protects lives and property. The FireBag provides passive gas safety by automatically stopping the gas supply when fire occurs, which prevents gas from feeding a fire, averting large scale incidents. Significant safety is achieved without the need for expensive actuators, electrical power, heat detectors, or fire detectors.
The FireBag is a passive, in‑line Thermal Activated Shutoff (TAS) that automatically isolates gas flow when exposed to fire. It requires no power, sensors, or communications and remains fully open in normal operation.
CA Congressperson Laura Friedman at U.S. House of Representatives: Committee on Transportation and Infrastructure Hearing
How the FireBag Thermally Active Shutoff Works
The FireBag thermal shutoff off consists of a zinc-plated steel pipe that contains a small device that responds to high temperatures. This device contains a plug, a spring, and a fusible metal alloy. When the ambient temperature near the FireBag reaches a trigger temperature of 203˚-212˚F, the fusible metal alloy melts, releasing the plug, and thereby shutting the flow of gas through the steel line. The FireBag closes within 60 seconds, per DIN 3586.
This sturdy small mechanism can withstand 1,500˚F for 90 minutes, giving time for first responders to reach the home and turn the gas supply off from the curb.
Cross-section of FireBag
under normal operating conditions
Cross-section of the FireBag when exposed to 203˚-212˚Fand triggered to a closed position
Since the FireBag is a passive device and only triggers in a fire situation, it is virtually maintenance free. No regular inspections are required. No fire or heat detectors are required to automatically intercept the gas flow.
Where the FireBag is Used
The FireBag is used on metering and regulating gas applications, both with single family homes, and with multi-meter gas manifolds.
High-pressure applications: Gas regulators are highly vulnerable in fire conditions. When exposed to extreme heat, they can fail and release gas under high pressure, intensifying the fire. To prevent this, it is critical to shut off the gas supply prior to the regulator. For systems with high-pressure gas supply requiring a regulator, it is recommended to install a FireBag upstream of the gas regulator
Low-pressure applications: Gas meters are susceptible to failure under extreme heat, potentially feeding a fire with high volumes of gas. For meter sets without a gas regulator, it is recommended to install a FireBag upstream of the meter. When installed at the gas meter, the FireBag can also be supplied with a blank fitting to keep the distance the same on the inlet and outlet of the meter to insure a level installation.
Where the FireBag is Used
The FireBag is used at the gas meter, with multi-meter gas manifolds, and at each gas appliance. At the gas meter, it can also be supplied with a blank fitting to keep the distance the same on the inlet and outet of the meter to insure a level installation.
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TECO® Americas, LLC
263 Cox Street Roselle, NJ 07203
inquiry@tecoamericas.com
Phone: 908-488-0909
https://tecoamericas.com
