วาล์วดับเพลิง4" Alarm Check Valve w/alarm gong TYCO

• AV-1 Alarm Valves may be installed vertically or horizontally
  - Groove x Groove, Flange x Flange, Flange x Groove Alarm Valves are divided seat ring, rubber-faced clapper, check type, water flow alarm valves
  - For use in wet pipe (automatic sprinkler) fire protection systems
  - Automatically actuates electrically and/or hydraulically operated alarms when there is a steady flow equivalent to the discharge rate for one or more sprinklers
  - Optional Retard Chamber used in installations subject to variable pressure (generally associated with public water supplies) to help prevent false alarms
  - Available pre-assembled with modular trim to provide a quick and convenient method for trimming valve risers. Contact TFP for details
  - Working water pressure range is 20 to 300 psi (1,4 to 20,7 bar)
  - Listings and Approvals: UL, C-UL, & FM
  

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