Product Overview

The VSR-10 is a vane-type waterflow switch designed for use on wet sprinkler systems, providing dependable flow detection across steel pipes ranging from 2" to 8" in schedule 10–40. It is fully UL, CUL, and CSFM Listed, FM Approved, and LPCB Approved, ensuring compliance for a wide range of fire protection applications.

Engineered with an instantly recycling pneumatic retard, the device prevents false alarms by requiring a sustained waterflow condition minimum 10 GPM (38 LPM) before activating its internal switches. With two isolated switch compartments and a rugged NEMA 4 / IP54 rated enclosure, the VSR-10 is suitable for both indoor and outdoor installations.

Key Features

Model Details
Model Number: VSR-10
Item Number: 1144410
For CE (EN12259-5) / VdS models, use VSR-EU
Nominal Pipe Size: 10 in (DN250)
Pipe O.D.: 10.75 in (273.0 mm)
Compliance & Applications
Approved for systems under:
• NFPA 13 – Automatic Sprinkler
• NFPA 13D – One/Two-Family Dwellings
• NFPA 13R – Residential up to Four Stories
• NFPA 72 – National Fire Alarm Code
Performance Specifications
Service Pressure: 450 PSI (31 BAR)
Flow Sensitivity: 4–10 GPM (15–38 LPM)
Maximum Surge: 18 FPS (5.5 m/s)
Electrical Ratings (per SPDT switch)
Two Form C contacts
• 10 A at 125/250 VAC
• 2 A at 30 VDC resistive
• 10 mA minimum at 24 VDC
Construction & Installation
Two ½" conduit knockouts
Independent switch compartments for mixed voltages
NEMA 4 / IP54 enclosure with factory gasket
Temperature Range: 40°F to 120°F (4.5°C to 49°C)
Includes factory-installed non-corrosive saddle sleeve

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Warranty Terms

VESDA VP-TEE

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