Leyon FM UL Model AV-1-300 Alarm Check Valve 300 psi 20.7 bar 2 1/2inch 4inch 6inch 8inch DN65 DN100 DN150 DN200 Vertical Horizontal Installation

The  Model AV-1-300 Alarm Check Valve is a waterflow alarm check valve with a seat ring and a rubber-faced clapper, designed for use in wet pipe automatic sprinkler fire protection systems. Its core function is to automatically activate electric and/or hydraulic alarm devices when a steady flow of water enters the system, equivalent to the discharge rate of one or more sprinklers.