Paddle Type Flow Control Switch HFS-25


Paddle Type Flow Control Switch HFS-15, HFS-20, HFS-25

Paddle Type Flow Control Switch HFS-25


HFS paddle type (also known as vane type) flow control switch adopts paddle type sensor, can be used as a control or an alarm in water cooling system, lubricating oil system or other fluid circuit. The set value is adjustable, the user can adjust it according to his needs.

Due to the plug-in structure, it is especially suitable for large-caliber flow monitoring. Different pipe diameters are equipped with different paddle numbers. There are five stainless steel paddles for users to choose. HFS water flow switch adopts micro-switch output, so it has high accuracy and good reliability. It is an economical flow control switch, which is widely used in central air conditioning, boiler, fire fighting, water treatment and other fields.

Technical Parameters:

  • Working medium: water, oil or other non-corrosive liquid to copper
  • Working pressure: 1.0MPa
  • Medium temperature: 1~100℃
  • Contact point life: 1000K Cycle
  • Protection level: IP54
  • Body material: brass or stainless steel
  • Target material: stainless steel
Rated Voltage (V) Power Factor 125V 250V
Rated Current (A) 1 15 15
Constant Induced Current 0.75 3.5 2.5
Instantaneous Induced Current 0.45 21 15
Model Interface Size Paddle Quantity

(Stainless Steel)

Factory Setting(N) Airtight Test Pressure (Mpa)
Cutting-off Connecting
Max min
HFS-15 G1/2" 3 0.5 1.5 1.6 1.0
HFS-20 G3/4" 3 0.5 1.5 1.6 1.0
HFS-25 G1" 5 0.5 1.5 1.6 1.0
Pipe Size


Flow control range when switch is on
Minimum Maximum
Reduced Flow Increased Flow Reduced Flow Increased Flow
1 18 21 45 50
1~1/2 30 35 100 105
2 50 58 150 155
2~1/2 75 86 187 200
3 100 115 225 260




Inner Parts Pictures:

flow switch inner parts