Flow Switch, 1/2", SPDT, NEMA 4
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F61 Series Flow Switch
The F61 Series Flow Switches respond to fluid flow in lines carrying water, ethylene glycol, or other nonhazardous fluids.
F61 Series Sensitive Flow Switches respond to low fluid flow rates in applications with pipe sizes under 1-inch trade size.
F61 Series Standard Flow Switches use a variety of paddle sizes to respond to fluid flow rates in applications with pipe sizes greater than 1-inch trade size.
Sensitive Flow Switches
The F61 Series Sensitive Flow Switches have 1/2 in. Female NPTF or 3/4 in. Female NPTF inlet and outlet connections.
Use F61 Sensitive Flow Switches in applications where flow rates are low, such as:
• water purification and treatment systems
• booster pumps
• cooling systems for electronic tubes, bearings, and compressors
• rapid recovery water heaters (starting the water heater when water is withdrawn) control of food waste disposal units (starting motor when a predetermined amount of water is flowing through the unit and stops when the flow decreases to a predetermined rate)
• switch to shut down the refrigeration compressor on a fluid chiller system if flow stops, reducing chances of chiller freeze-ups
Standard Flow Switches
Use F61 Series Standard Flow Switches in applications with fluid pressures up to 150 psig (1034 kPa). A typical application for a standard F61 flow switch is to shut down the refrigeration compressor on a fluid chiller system if flow stops, reducing chances of chiller freeze-ups.
NEMA 1 Enclosures
Use models with NEMA 1 enclosures for indoor applications where they are protected from weather and splashing water. Use these models with pipes carrying fluids at temperatures in the range of 32 to 250°F (0 to 121°C) where fluid temperatures are above ambient dew point.
NEMA 3/NEMA 3R Enclosures
Use models with NEMA 3/NEMA 3R (rain-tight) enclosures for indoor or outdoor applications in high-humidity environments. Use these models in applications with pipes carrying fluids at temperatures below dew point temperature or below 32°F (0°C) but above -20°F (-29°C). Do not use these models in applications or environments where the temperature may cause the fluid to freeze.
The flow switch responds to pressure exerted on the fluid paddle by the flowing fluid. A range adjustment screw adjusts the rate of flow required to actuate the switch.
Replaces Part Number: F61MD-1