Potter Electric Signal Co. Us VSR-SG Waterflow Switch

Product Description

The POTTER ELECTRIC SIGNAL CO. US VSR-SG is a vane-type waterflow switch with a built-in retard feature, designed for use in wet-pipe fire sprinkler systems. It detects water movement caused by sprinkler activation or system flow events and sends an alarm signal to a fire alarm control panel. The integrated retard function helps reduce false alarms by delaying the alarm output until sustained flow is confirmed. This device is installed by licensed fire protection sprinkler contractors and fire alarm technicians working on commercial and residential suppression systems.

The VSR-SG is suited for installation on wet-pipe sprinkler system branch lines and mains. It monitors waterflow and initiates alarm signaling when a paddle deflection caused by flow is detected. The retard adjustment allows technicians to fine-tune delay timing to match system pressure and flow characteristics, reducing nuisance trips from pressure fluctuations or water hammer events. This switch is a standard component in fire suppression monitoring setups across light hazard and ordinary hazard occupancies.

Key Features

• Vane-type paddle design detects waterflow in wet-pipe sprinkler piping
• Built-in adjustable retard helps prevent false alarm signals
• Generates an alarm output signal compatible with fire alarm control panels
• Sold as a single unit per package

Compatibility

Designed as an OEM-style replacement or new-installation waterflow switch for wet-pipe fire sprinkler systems requiring vane-type flow detection with retard functionality.

Installation Notes

Installation must be performed by a licensed fire sprinkler contractor or qualified fire alarm technician in accordance with NFPA 13 and NFPA 72 requirements. Shut down and depressurize the sprinkler system before cutting into the pipe to install the saddle fitting and vane assembly. Verify paddle length is appropriate for the pipe diameter before installation to ensure proper vane deflection. After installation, conduct a flow test using the inspectors test valve to confirm alarm signal transmission before returning the system to service.