The Viking Model VXD Deluge Valve is a flood valve with one moving mechanism. The Deluge Valve is used to control water flow in Deluge and Preaction sprinkler systems. The valve is held closed by system water pressure trapped in the priming chamber, keeping the outlet chamber and system piping dry. In fire conditions, when the releasing system operates, pressure is released from the priming chamber. The Deluge Valve diaphragm opens to allow water to flow into the system piping. Use Viking’s Valve and System Configurator to build out an entire system riser with VXD valves, and send a detailed materials list directly to Viking SupplyNet for a quote.