Kelco F27 25mm Time Delay Paddle Flow Switch 

The Kelco F27 Time Delay Paddle Flow Switch is designed to provide reliable pump control with built-in digital start-up and run-on timers that protect against dry running while avoiding nuisance trips from minor flow interruptions. On start-up, the F27 overrides its normal "no flow" shut-off, allowing a pump to run for up to 3 minutes to establish flow. Once running, the adjustable run-on timer allows pumps to ride through brief flow losses without shutting down, while still providing full dry-run protection.

Built using Kelco’s proven magnetic suspension system, the F27 ensures frictionless paddle movement and complete isolation of the electronics. It can be installed in either the suction or discharge line, with a 25mm (1") BSP process connection, and is suitable for pipe sizes 25mm and above. Available in all-polypropylene for corrosion resistance or 316 stainless steel for high-pressure applications.

Electronics are protected against brownouts and voltage surges, and the IP-rated weatherproof enclosure includes LED indicators for all functions.

FEATURES

• Australian-made paddle flow switch with built-in timers
• Adjustable start-up override (up to 3 minutes)
• Adjustable paddle bounce ignore/run-on timer
• Magnetic suspension paddle – no mechanical seals
• Polypropylene model rated to 18 bar (260 psi)
• 316 stainless steel model rated to 400 bar (5800 psi)
• 220–250V AC or 24V AC/DC supply options
• LED indicators for operational status
• Suitable for pipe sizes 25mm and larger
• Weatherproof housing for indoor/outdoor use
  

APPLICATIONS

• Pump dry-run protection
• Aggressive groundwater, seawater, and chlorinated water
• Chemical processing systems
• Irrigation and agricultural pump control
• Industrial pump protection with variable flow conditions
  

SPECIFICATIONS

• Process connection: 1" BSP
• Max pressure: 18 bar (poly) / 400 bar (SS)
• Power supply: 220–250V AC or 24V AC/DC
• Adjustable timers: Start-up override & run-on delay
• Weatherproof rating: IP-rated enclosure
• Suitable liquids: Water, seawater, chlorinated water, chemicals