17.06 What are emergency valves and where should they be located?

Emergency valves are installed in fuel piping to provide shutoff in the case of a fire event. The most common type of emergency valve is a normally closed valve, held open by a fusible link which fails at 165 degrees F.

Emergency shutoff valves are located immediately inside the wall of a building or room, so that a fire in the room will close and isolate the valve. In some installations an emergency valve is located at each generator, to protect against a fire related failure of the fuel hoses at the generator.

Many common emergency valves are not UL or FM approved. Common brands of approved valves are Jamesbury and Essex. These valves include valves that are fire rated, and a fail-safe close mechanism, held open but a fusible link.