System Sensor WFD80N 8″ Fire Sprinkler Water Flow Switch – UL/FM, NEMA 4, 450 PSI

WFD80N 8″ Fire Sprinkler Water Flow Switch – UL/FM Listed

The System Sensor WFD80N is a heavy-duty 8 inch vane-type water flow switch designed for use in large wet-pipe fire sprinkler systems. It features a high-pressure rating, field-serviceable components, and a durable NEMA 4 enclosure suitable for indoor or outdoor use. This model is UL Listed and FM Approved for fire protection applications.

Top Features:

• Designed for 8″ Schedule 7–40 steel pipe
• UL Listed and FM Approved
• 450 PSI maximum pressure capacity
• Adjustable pneumatic delay (0–90 seconds)
• Dual SPDT switches – 10 A @ 125/250 VAC
• Weatherproof NEMA 4 enclosure
• Audible and visual flow indication
• Field-replaceable timer and switch mechanism

Applications:

• Large-scale wet fire sprinkler systems
• Municipal, commercial, and industrial fire risers
• Outdoor or mechanical room installations

Specifications:

• Operating Temperature: 32°F to 150°F (0°C to 66°C)
• Flow Activation: 4–10 GPM
• Conduit Openings: Two 1/2″ NPT (one open, one knock-out)
• Mounting Orientation: Vertical or horizontal

Note: For optimal performance, follow NFPA and local fire code requirements during installation. Use adjustable delay to reduce false alarms caused by water hammer.