Diaphragm valve DV-5

manualcontrolfor water

Fire protection systems controlled by the TYCO DV-5 Preaction Type A Valve utilize automatic sprinklers and a supplemental detection system. The supplemental detection system is typically comprised of 24 VDC heat detectors, smoke detectors, and manual pull stations. Actuation of the detection system automatically operates (releases) the DV-5 Deluge Valve, allowing water to flow into the sprinkler piping system and to be discharged from any sprinklers that may subsequently open. In the event of loss of power, the DV-5 Deluge Valve with Preaction Type A Trim will act as a regular dry-pipe valve station. The Preaction Type A assembly is rated for a maximum service pressure of 16 bar. These DV-5 Preaction Type A Valves have been designed in accordance with the EN12845 Standard describing Preaction Type A Trim criteria. This standard defines operation as a dry pipe system activated by an automatic fire detection system but not operation of sprinklers. Typically, the system designer selects detection components for the DV-5 Preaction Type A Valves that will respond to a fire sooner than the automatic sprinklers. Consequently, the system will experience a minimal delay in water delivery over that for a wet pipe sprinkler system because the system will have begun to fill with water before a sprinkler operates. Preaction Type A systems will need to be designed as wet pipe systems or according to the local authority having jurisdiction. DV-5 Preaction Type A Valves are generally used to protect areas where there is danger of serious water damage that might result from damaged automatic sprinklers or piping.