water flow switch 1. Saddle, Threaded, Welded, Flange type ; 2. DN 50 to DN 200 ; 3. full set of fire alarm system.

water flow switch  is part of automatic fire fighting system. Usually installed at top of the pipe indicating fire accident zone, starting fire alarm equipment and fire pump. Widely used at wet-type, dry-type, pre-acting automatic fire fighting system.

When the sprinklers operating, the water flow will push the indicator blade to one side, which send out the signal to control center starting all related equipment. When the water stop, blade return to original place, cut out the signal.

water flow switch