The Viking Model J-1 Alarm Check Valve serves as a check valve bytrapping pressurized water above the clapper and preventing reverse flow fromsprinkler piping. The valve is designed to initiate an alarm during a sustainedflow of water (such as the flow required by an open sprinkler) by operating anoptional water motor alarm and/or alarm pressure switch. The valve is madesuitable for use on variable pressure water supplies by adding the optionalretard chamber to the standard trim.
Features
Ductile iron body for less weight and extra strength.
Rubber-faced clapper hinged to access cover for quick removal andeasy servicing.
All moving parts can be serviced without removing the valve fromthe installed position.
With the cover/clapper assembly removed, clapper rubberreplacement requires removal of only one screw.
External by-pass trim to minimize clapper movement and false alarm.
Trim allows installation of optional non-interruptible pressureswitch to activate an electric alarm panel and/or remote alarm.
Can be installed on constant or variable pressure water supplies.
Can be installed vertically or horizontally, with the access coverfacing up.
Valve housing tapped for inlet and outlet pressure gauges, alarmdevices, and system main drain.
Trim includes alarm test valve for testing alarms without reducingsystem pressure.
Pressure Rating - 300 psi (20.7 bar) water working pressure.
Factory tested hydrostatically to 600 psi (41.4 bar).
The valve may be hydrostatically tested at 350 psi (24.1 bar) and/or 50 psi (3.4 bar) above the normal water working pressure, for limited periods of time (two hours), for the purpose of acceptance by the AHJ. If air testing is required, DO NOT exceed 40 psi (2.8 bar) air pressure.
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