The deluge valve Model VDD is an innovative concept valve designed for fire protection systems according to NFPA 15, UL 260 and IEC 61508/61511. The VDD deluge valve combines all the functions available on the traditional deluge valves with a fully redundant architecture,
designed to achieve higher reliability. In fact, the VDD deluge valve has two priming chambers,
each one provided with its own diaphragm (made of EPDM reinforced with Nylon) and actuation trim, which offer two independent waterways to the water spray system Each priming chamber provides the nominal design waterway for the fire protection system: in case of failure of one diaphragm, the opening of the other diaphragm allows the hydraulic waterway for the correct operation of the
water spray system.