POTTER VSR-S

Product Overview

 The VSR-S Series Waterflow Alarm Switch is a vane-type detector designed for use on wet sprinkler systems with pipe sizes ranging from 1" to 2" (25mm–50mm). It can also serve as a sectional waterflow detector on larger systems. The switch contains two SPDT snap-action switches and an adjustable, instantly recycling pneumatic retard. These switches are triggered when water flow of 10 GPM (38 LPM) or more occurs downstream and persists long enough to overcome the selected retard setting. This ensures accurate detection while preventing false alarms from brief pressure fluctuations.

Key Features

• UL, ULC, CSFM Listed and NYMEA Accepted
• Fits 1", 1¼", 1½", and 2" pipe sizes
• Two SPDT (Form C) switches for reliable signaling
• Adjustable, instantly recycling pneumatic retard
• Flow sensitivity range: 4–10 GPM (15–38 LPM)
• Maximum surge: 18 FPS (5.5 m/s)
• Service pressure: Up to 300 PSI (20.7 BAR)
• Die-cast red enamel enclosure, NEMA-4/IP54 rated
• Two conduit openings for ½" conduit, individual switch compartments allow dissimilar voltages
• Compatible with plastic, copper, and schedule 40 iron pipe
• NFPA compliant for automatic sprinkler (NFPA-13), one- or two-family dwellings (NFPA-13D), residential occupancy up to four stories (NFPA-13R), and fire alarm systems (NFPA-72)
• Suitable for indoor or outdoor use with factory-installed gasket and proper conduit fitting