Manual shut-off at the source of an appliance gas fire is simply too dangerous. Typically, the fire department manually shuts gas off from the street-side main shutoff valve using a special wrench. The elapsed time between when the fire is detected, the fire department contacted, and their arrival can lead to excessive property damage and raises the potential for gas explosions.
Assured Automation has sold fire safe valves and actuators to manufacturers, chemical manufacturers, HVAC and contractors, and gas utilities worldwide for over 25 years and is introducing the FireBag to North America.
“In the absence of any readily accessible US standard for the certification of thermo actuated shut-off devices for natural gas, propane and butane we analyze how the API607 standard may provide some guidance in the selection of such devices” reports Bill Farrell, president of Assured Automation. “In addition, we encourage and continue to contribute to the discussion that will lead to the development of U.S. standards as comprehensive as those used in Europe,” he adds.
API Standard 607 defines the Fire Test for Soft Seated Quarter Turn valves; it defines the test and the methods for testing. Since it is a well known standard, the API607 is often used as an acceptable criteria for devices that are not covered by the standard. “In other words, we need the device to meet API607 even though it cannot possibly meet the API607 standard” Farrell points out. The FireBag will meet the temperature and leakage requirements of ANSI/API 607 for natural gas, propane and butane. When the outside temperature reaches 203-212°F (95-100°C) metal alloy in the FireBag that keeps plug and cartridge together melts and the spring pressure pushes the plug against the gas opening to close it completely. Once triggered, the shut-off device works up to 1,697°F (925°C) for one hour. No fire or heat detectors are required to automatically intercept gas flow.