WFSR-F POTTER

Product Overview

 The WFSR-F is a pressure-operated waterflow switch designed with an adjustable, instant-reset pneumatic retard to minimize false alarms caused by normal fluctuations in system pressure. Installed on the alarm port of a wet sprinkler system’s alarm check valve, this device delivers reliable activation when rising water pressure indicates system flow. Its rugged die-cast enclosure and NEMA 4 rating (with proper fittings) make it suitable for demanding environments and compliant with major NFPA standards.

Key Features

• Pressure-activated switch with adjustable pneumatic retard to prevent nuisance alarms
• Factory-set activation between 5–8 PSI (0.35–0.55 BAR) on rising pressure
• Supports system pressures up to 175 PSI (12.1 BAR)
• Two SPDT (Form C) contacts rated 15A at 125/250VAC and 2A at 30VDC
• Durable die-cast housing with red powder-coat finish
• NEMA 4 enclosure when installed with proper conduit fittings
• Includes tamper-resistant cover fasteners and key
• Compatible with NFPA 13, 13D, 13R, and 72 system requirements