Fire Protection Alarm Check Valve

forede ®  Fire Protection Alarm Check Valve is an indispensable device in fire sprinkler systems, combining two essential functions: preventing backflow of water and triggering fire alarms upon system activation. Designed for vertical installation in wet pipe sprinkler systems-where water is constantly pressurized in the pipes-this valve ensures immediate response to fire emergencies while maintaining system integrity.

The primary role of the alarm check valve is to regulate water flow direction while monitoring system activity. It consists of a spring-loaded clapper, an alarm port, and associated trim components (e.g., pressure switches or paddle-type flow detectors). Under normal conditions, the clapper remains closed, preventing water from flowing backward into the municipal supply-a safeguard against contamination and pressure loss. When a sprinkler head activates due to heat, water begins flowing through the system, creating pressure that lifts the clapper. This action opens the alarm port, directing water to a water motor gong (a mechanical alarm) or an electrical pressure switch, which sends a signal to the building's fire alarm control panel. The alarm system then alerts occupants via audible/visual signals and notifies emergency services, enabling rapid evacuation and intervention.