Title: AV-1 alarm valve.pdf
The AV-1-300 Alarm Check Valve Trim includes pressure gauges to monitor system pressure conditions, a bypass check valve, a main drain valve, and an alarm test valve. The bypass check valve reduces the possibility of false alarms by permitting slow as well as small transient increases in water sup- ply pressure to be passed through to the system without opening the water- way clapper.Technical Data Approvals UL and C-UL Listed FM ApprovedWorking Water Pressure Range 20 to 300 psi (1,4 to 20,7 bar)Friction Loss Refer to Graph A.End Connections Groove x Groove Flange x Groove Flange x Flange Refer to Table A for size applicabilityWeights Refer to Table A.Physical Characteristics The body is ductile iron, the hand-hole cover is ductile iron, and the seat ring is bronze. The clapper for the 2-1/2 inch (DN65) valve size is stainless steel. The clapper for the larger valve sizes is ductile iron. All valve sizes utilize an EPDM clapper facing.