10 Inch Vane Type Waterflow Alarm Switch with Retard
The Model VSR is a vane type waterflow switch for use on wet sprinkler systems. It is UL and CUL Listed for use on steel pipe; schedules 10 through 40.
The VSR may also be used as a sectional waterflow detector on large systems. The VSR contains two single pole, double throw, snap action switches and an adjustable, instantly recycling pneumatic retard. The switches are actuated when a flow of 10 GPM (38 LPM) or more occurs downstream of the device. The flow condition must exist for a period of time necessary to overcome the selected retard period.