KWFS Stainless Steel Liquid Flow Switch with 500K Cycle SPDT Micro Switch, 120℃ Max Temp, 20 Bar Pressure
The KWFS series liquid flow switch features a reliable micro switch with over 500,000 contact cycles, SPDT switching, precision assembly, and easy wiring access. When liquid flow exceeds or falls below the set point, one circuit closes while the other opens, providing chain action or cut-off protection for industrial systems.
Designed for controlling and monitoring liquid flow in boilers, pumps, and HVAC equipment including heating, cooling, and air conditioning systems.
- Flow control for water and standard media
- Reliable SPDT micro switch operation
- 15(8A) 250VAC switch rating
- IP65 protection rating, Class I enclosure
- Adjustable set point
- Stainless steel paddle
- Brass construction
- Maximum liquid temperature: 120℃
- Maximum working pressure: 20 Bar
| Operation Type | On/Off, single-stage, micro switch |
| Output | SPDT 15(8A) 24/250VAC |
| Flow Rate Adjustment | Internal screw |
| Sensing Element | Paddle |
| Liquid Applications | Hot, chilled, well, pool and sea water, brine or ethylene glycol |
| Fluid Contact Material | Brass |
| Paddle Material | Stainless steel |
| Liquid Temperature Range | -20℃ to 120℃ |
| Ambient Temperature Range | -40℃ to 85℃ |
| Ambient Humidity | 10-90% RH, non-condensing |
| Cable Entry | M18 Fitting |
| Housing | Fire Resistance ABS or PC |
| Protection Rating | IP65 |
| Color | White |
| Weight | 1.0 Kg |
| Model | Connection |
|---|---|
| KWFS-1 | 1/2" -14 NPT |
| KWFS-2 | 3/4" -14 NPT |
| KWFS-3 | 1" -11½ NPT |
The flow switch can be installed in any position away from elbows or throttlings, with arrow aligned to flow direction. For vertical pipes, recalibrate range to balance paddle weight. When downward mounted, avoid slag accumulation and install in straight pipe sections at least 5 times the pipe diameter upstream and downstream from filters, valves, and other components.
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