POTTER VSG-4

Product Overview

The VSG-4 is a flexible vane-type waterflow switch engineered for wet pipe water mist systems that require reliable alarm activation at very low flow rates. Designed for installation on 4-inch stainless steel or brass piping, it fits systems built within specific wall-thickness parameters. Its durable die-cast enclosure, factory-installed gasket, and non-corrosive internal components make it suitable for both indoor and outdoor environments. Additionally, the model can serve as a sectional waterflow detector in larger system layouts.

Key Features

• Listings & Approvals: UL, ULC, and CSFM certified  

• Pipe Compatibility: 4" pipe (114.3 mm OD) with wall thickness from 5.4 mm to 6.4 mm
   
• System Performance:
  • Service pressure up to 450 PSI (31 bar)
  • Alarm activation at 3.0 GPM (11.4 LPM)
  • Maximum surge velocity of 18 FPS (5.5 m/s)
     
• Electrical Requirements:
  • Standby: 10 mA at 120 VAC or 1.5 mA at 24 VAC/DC
  • Alarm: 40 mA at 120 VAC or 35 mA at 24 VAC/DC
  • Contacts: DPDT (Form C), rated 2 A at 0–30 VDC or 0–125 VAC (resistive)
     

• Installation Details:

  • Includes two ½" conduit knockouts
  • NEMA 4 enclosure rating with proper conduit fitting
  • Factory-installed non-corrosive sleeve in saddle

   

• Environmental Specifications:
  • Temperature range: 40°F to 120°F (4.5°C to 49°C)
  • Suitable for indoor or outdoor applications
     
• Important Notice: Not designed for use in hazardous or explosive environments