The F27 time delay flow switches are paddle switches with built-in digital timers that override the normally off state of the flow switch and allow a pump to start in spite of an initial lack of flow. They also include an adjustable run-on timer that lets a pump ignore minor flow interruptions while still being fully protected against running dry.
When first powered up the F27 ignores the initial lack of flow and allows a pump under its control to run for up to 3 minutes. At the end of the set time the F27 will shut down the pump if there is no flow or allow it to run on if flow has been established.
FEATURES
- Dry run protection for pumps
- Automatic start-up override
- Dry run protection for pumps
- Optional ‘paddle-bounce’ ignore
- Indicator LEDs for all functions
- No metal parts in contact with fluids
- 240V, 24VAC, and 12VDC models available
- Reliable proven construction
- Weatherproof enclosure
- Suits pipe sizes 25mm and above
- Full 18bar(260 psi) pressure rating
- High pressure stainless steel models available
The F27 controllers have no metal parts in contact with liquids. They operate magnetically through their thermoplastic housings. They are therefore ideally suited to use in aggressive ground water, seawater or chlorinated water and with a huge variety of chemical solutions including most acids and alkalis.
The F27 is made from a blend of ABS and polypropylene thermoplastics, specifically tailored to give the highest possible performance, in terms of mechanical strength, ultraviolet stability, and chemical inertness. All the F27 controllers use our well proven magnetic suspension system, to give a frictionless spring return action to the paddle, and total isolation of the electronic module. The electronics built into the F27 are both brown out and voltage surge protected.
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