F352, F353 Hydrant Shutoff Valve F352 AND F353

The Hydrant Shutoff Valve provides the means of controlling ON/OFF flow control in aircraft refueling operations. The valve inlet is connected to the riser flange of the underground fuel piping. The outlet adapter mates with a hydrant coupler or coupler/regulator attached to a hose supplying or receiving fuel. The installed hydrant valve forms a pressure tight ON/OFF connection between the refueling system and fuel supply source. The major functional components of the valve are the outlet adapter, pressure relief valve, poppet, servo assembly, maintenance valve stem, piston, inner chamber, and valve body.