BERMAD 700E Deluge Valves are Y Type globe valves with integral unitized double chamber actuator that consists of one single moving assembly, which includes a diaphragm assembly, a flat seal disk and a stainless steel removable seat. These automatic water control valves are designed for high pressure service, in vertical or horizontal installations and are available in diameter sizes from 1½” to 16”; DN40 to DN400. The BERMAD 700E valves are used for water flow control in Deluge, Pressure Control Deluge, Preaction or Water/ Foam systems, and are manufactured from materials suitable for freshwater or alternative for seawater, foam concentrate or other corrosive fluids. The 700E Deluge Valve is held closed by system water pressure trapped in the control chamber. When the releasing system operates, pressure is released from the control chamber, and the seal disc opens to allow water to flow into the system. The 700E valve body design includes a single, full bore seat with unobstructed flow path, free of any in-line ribs, supporting cage, or stem guides. The 700E “Y Type” design provides high flow capabilities with minimum head loss. The integral unitized double-chambered actuator provides a combination of positive, immediate response with smooth hammer-free, drip-tight closing. The whole actuator can be easily removed for a quick in-line inspection and servicing. Valve actuation is accomplished by one moving assembly which includes a replaceable flat diaphragm, harnessed to the diaphragm assembly, a stainless steel stem and a flat seal disk assembly. The balanced seal-disk assembly with its resilient seal enables controlled actuation, high durability and perfect drip-tight sealing, even under harsh conditions.