Title: AV-1 alarm valve.pdf
ONCE RETARD CHAMBER OVERFLOWS, WATERFLOW PRESSURE ALARM SWITCH AND WATER MOTOR ALARM ACTUATEWATERFLOW TO WATER MOTOR ALARM7/32" (5,6 mm) ORIFICE INLETWATERFLOW TO SYSTEMUPON SPRINKLER FLOW, WATERWAY CLAPPER OPENSSYSTEM PRESSURE GAUGE1/8" (3,2 mm) ORIFICE OUTLETSUPPLY PRESSURE GAUGEWHEN FLOW THROUGH RESTRICTION ASSEMBLY INLET EXCEEDS OUTLET, RETARD CHAMBER BEGINS TO FILLMAIN DRAIN VALVEWATERFLOW THROUGH SEAT RING GROOVE AND ALARM PORTALARM CHECK VALVEFIGURE 2 2-1/2, 4, 6 & 8 INCH (DN65, DN100, DN150 & DN200) MODEL AV-1-300 ALARM CHECK VALVE OPERATIONSCREENINLET RESTRICTION WITH 0.219" (5,6 mm) ORIFICEDRAIN RESTRICTION WITH 0.125" (3,2 mm) ORIFICEFIGURE 3 RESTRICTION ASSEMBLY (Provided with Alarm Check Valve Trim)Valves installed in the vertical position must have the flow going up. Valves installed in the horizontal position must be positioned so that the drain connec- tion points down.