Viking VSR Auto Test Electronic Waterflow Switch

The Viking VSR Auto Test Electronic Waterflow Switch is a precision vane-type device engineered specifically for wet sprinkler fire protection systems. It installs directly into commercial and industrial pipe assemblies to monitor water movement, activating dual alarm contacts at rates starting at 10 GPM (38 LPM) to provide early alerts of system activation or faults.

Designed to satisfy stringent fire protection code requirements, this switch is UL Listed and FM Approved. Its automated self-testing and remote test capabilities fulfill strict compliance and testing requirements under NFPA standards by verifying paddle and trip stem assembly operation without requiring actual water discharge or physical flow testing, thereby minimizing system downtime and simplifying routine maintenance workflows.

Key Features & Construction

• Automatic Self-Testing: Built-in automated testing of the paddle and trip stem assembly reduces manual maintenance and enhances ongoing reliability.
• Remote Test Capability: Supports optional remote auto test controls to conduct flow detection tests without moving water.
• Dual Alarm Contacts: Activates alarms at low waterflow rates starting at 10 GPM (38 LPM) for precise alerting.
• Adjustable Recycling Retard: Allows you to customize alarm reset timing to prevent nuisance alarms under varying operational conditions.
• Steel Pipe Compatibility: Fits steel pipe schedules 10 through 40 in sizes ranging from 2" to 8".
• Robust Mounting Design: Solid mounting hardware ensures stable and accurate positioning within demanding piping environments.

Technical Specifications & Compliance Table

Always verify local Authority Having Jurisdiction (AHJ) requirements and consult manufacturer technical data sheets prior to beginning your installation.

Documentation: Download Manufacturer Technical Data & Cut Sheet (PDF)