Alarm Check Valve

Model AV-1-300 Alarm CheckValve, 300 psi (20,7 bar) 2-1/2, 4, 6, & 8 Inch (DN65, DN100, DN150 &DN200) Vertical or Horizontal

The TYCO Model AV-1-300 Alarm Check Valves are divided seat ring,rubber-faced clapper, waterflow alarm check valves that are intended for use inwet pipe (automatic sprinkler) fire protection systems. They may be installedvertically or horizontally*, and they are designed to automati­cally actuateelectric and/or hydraulic alarms when there is a steady flow of water into thesystem that is equivalent to the discharge rate of one or more sprinklers.

A separately ordered Model RC-1 Retard Chamber (TFP920) isrequired for installations subject to variable pressures. It is used to helpprevent false alarms associated with pressure variations in public watersupplies.

The AV-1-300 Alarm Check Valve Trim includes pressure gauges tomonitor system pressure conditions, a by-pass check valve, a main drain valve,and an alarm test valve. The bypass check valve reduces the possibility offalse alarms by permitting slow as well as small transient increases in watersupply pressure to be passed through to the system without opening the waterwayclapper.