The valve is installed on Filter Separator along with complete Float Operated Control System (VT 65-8) to monitor and control the water level in the Separator. In the event, water level rises above certain level, the Slug Control Valve (Fueling Valve) will close automatically and Water Drain Valve will open allowing the Water to Drain Once the water level drops to safe level the Fueling Valve opens allowing the Fueling to start and Drain Valve closes. Entire system is foolproof for Aircraft Fueling. All major Indian Airports such as: Mumbai, Delhi, Kolkota, Hyderabad, Chennai and many Air Force bases are equipped with our such system.