Performance
- Static pressure rating: 450 psi.
- Triggering threshold: 4–10 GPM.
- Maximum surge: 18 feet per second.
- Operating temperature range: 32°F to 150°F.
Vane Type Waterflow Detector
Safe Signal WFDN Series Waterflow Detector
WFDN Series — 450 psi, 4–10 GPM threshold, 2" to 8" steel pipe, NEMA 4
WFDN Waterflow Detector from Safe Signal is a vane type waterflow detector for 2" to 8" steel pipe in residential and commercial sprinkler systems, rated 450 psi and mountable vertically or horizontally.
Manufactured by
Safe Signal
Safe Signal WFDN Series Waterflow Detector
Review the confirmed product information, including description, features, benefits, and applications.
The WFDN Series Waterflow Detectors from Safe Signal are designed for residential and commercial fire protection systems. They feature a NEMA 4 rated enclosure that is more damage-resistant than traditional metal designs, suitable for indoor and outdoor installations, and operate from 32°F to 150°F.
The detectors are approved for Schedule 7 to 40 steel pipe in sizes 2" to 4" and Schedule 10 to 40 in sizes 5" to 8", and can be mounted in vertical or horizontal positions. A mechanical time delay minimises false alarms caused by pressure surges or trapped air.
Pipe & Mounting
- Pipe sizes 2" to 8".
- Schedule 7–40 steel pipe (2" to 4") and Schedule 10–40 (5" to 8").
- Vertical or horizontal mounting.
- Directional cover shows flow direction.
Electrical
- Two sets of SPDT (Form C) synchronized switches.
- Contacts rated 10.0 A, ½ HP @ 125/250 VAC and 2.5 A @ 6/12/24 VDC.
- Switch synchronization activates alarm panel and local bell/horn strobe.
- Accommodates up to 12 AWG wire with wire-ready terminals.
Enclosure & Service
- UL-listed models with NEMA 4 rating.
- Sealed retard mechanism immune to dust and contaminants.
- Visual and audible (73 dBA) switch activation.
- Field-replaceable timer/switch assembly with improved timer repeatability and accuracy.
Primary Signalling
Primary waterflow signalling for fire sprinkler systems.
Surge Performance
Improved performance under vibration and water surge conditions.
Fewer False Alarms
Mechanical time delay and sealed retard mechanism reduce false alarms.
Long Service Life
Lightweight, corrosion-resistant housing extends product life.
WFDN waterflow detectors monitor waterflow in fire sprinkler systems across building types.
Commercial Buildings
Waterflow monitoring in commercial building sprinkler systems.
Industrial Facilities
Sprinkler waterflow detection in industrial facilities.
Residential Buildings
Waterflow alarm signalling in residential sprinkler systems.
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