POTTER VSR-5

Product Overview

The VSR-5 Waterflow Switch is a vane-type device designed for use on wet sprinkler systems, approved for steel pipe installations from 2" to 8" (50–200 mm). Suitable for both sectional and system-wide waterflow monitoring, it activates when the system experiences a flow of 10 GPM (38 LPM) or more. The unit features dual SPDT snap-action switches and an adjustable, instantly recycling pneumatic retard to prevent false alarms caused by brief surges. Built for demanding environments, the VSR-5 is UL, CUL, CSFM, FM, and LPCB approved and supports multiple NFPA system types.

Key Features

• Designed for wet pipe sprinkler systems; approved for 2"–8" steel pipe (Schedules 10–40)
• Activates at flows of 10 GPM (38 LPM) or greater
• Adjustable, instantly recycling pneumatic retard to prevent nuisance alarms
• Dual SPDT (Form C) snap-action switches
• Suitable as a sectional waterflow detector on large systems
• Service Pressure: Up to 450 PSI (31 BAR)
• Flow Sensitivity Range: 4–10 GPM (15–38 LPM)
• Maximum Surge: 18 FPS (5.5 m/s)
• Environmental Protection: NEMA 4 / IP54 enclosure; indoor or outdoor use
• Operating Temperature: 40°F–120°F (4.5°C–49°C)
• Two ½" conduit knockouts; separate switch compartments for dissimilar voltages
• Includes non-corrosive sleeve in saddle
• Certifications: UL, CUL, CSFM, FM, LPCB Approved
   
• Dimensions (Pipe-Related):
  • Nominal Pipe Size: 5 in (DN100)

  • Pipe O.D.: 5.563 in (141.3 mm)
    

• Compliant with:
  • NFPA-13
  • NFPA-13D
  • NFPA-13R
  • NFPA-72