The AMOT model 2180 Diaphragm Operated 2-Way Gas Valve will shut off the fuel gas and vent the manifold when used on an internal combustion engine. Normal application of this model is for shutting down a gas engine in the event of a dangerous condition such as high jacket water temperature, low lubrication oil pressure, excessive vibration, high gas discharge temperature etc. The valves are used in combination with a complete AMOT control system using AMOT sensors for monitoring the condition of the engine.