Morrison Bros 535B 0300 AV 3" Gate Valve w Expansion Relief, Brass, Locking AC Electric The base of the emergency PI PI 2104 793 The base of the emergency valve is securely anchored to the concrete dispenser island through a stabilizer bar system within the dispenser sump or pan to ensure proper shearing action High Flow Capacity The primary poppet is held out of the flow stream while the secondary poppet is held normally open to minimize head loss across the valve and to protect the poppet seals from damage and erosion Rising stem gate valves are used for manual flow control in petro chemical liquid handling systems and bulk plants Packing: PTFE impregnated fiber