Kelco F27 25mm Time Delay Paddle Flow Switch 

The F27 time delay flow switch is a paddle flow switch with built-in digital timers that override the normally off state of the flow switch and allow a pump to start in spite on an initial lack of flow. They also include an adjustable run-on timer that lets a pump ignore minor flow interruptions while being fully protected against running dry. When first powered up the F27 ignore 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.

All the F27 controllers use well proven magnetic suspension systems 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 brownout and voltage surge protected. The F27 can either be installed in either the suction or discharfe pipe of the pump. Normally they are installed in a straight section of the discharge pipe, as shown in the accompanying sketch. A 1"BSPsocket or tee must be provided to fit the controller. The controllers are suitable for all types of pipework 25mm (1 inch) diameter or larger

FEATURES

• Dry run protection of rpumps
• Adjustable start-up override 
• Adjustable paddle bounce ignore
• All poly and 316 stainless models availlable
• 220/250VAC or 24VAC or DC Supply
• Indicator LEDs for all functions
• Weatherproof enclosure 
• Suits pipe sizes 25mm and above
• Poly version 18 bar (260psi) pressure rating
• SS version 400 bar (5800psi) pressure rating

APPLICATIONS

• Ideally suited for
  • Aggressive ground water
  • Sea water 
  • Chlorinated water 
  • Huge variety of chemical solutions