HFS series target flow switchDetailed product description：

HFS series flow switch

1. Application of flow switch:
The HFS series flow switches produced by EUWEN are mainly used in water treatment systems, central air conditioning, water-cooled units, and other fields. They are suitable for water, ethylene glycol, and any other liquid that has no corrosive effect on brass, phosphor copper, or has no impact on sealing performance.
2. Working principle of flow switch:
When the flow rate exceeds the set value, the fluid pushes the blade and drives the micro switch at the top through the mechanical device inside the flow switch. Its single pole double throw switch contact (SPDT) can make one circuit conductive while cutting off the other circuit This flow switch is usually used in places that require interlocking or "cut-off" protection. The number of blades can be adjusted and the length of the blades can be adjusted to meet the needs of different pipe diameters and flow rates.

2. Overview:
The HFS series flow switch has SPDT output, excellent performance, high precision and reliability. Can be installed in water pipes or liquid pipelines that have no corrosive effect on copper. When the liquid flow rate reaches a certain rate, one circuit may close and the other circuit may open without reaching the rated point.
HFS flow switches are only used for liquid media above 0 ℃ and can also be used for high salt liquids, but are not classified as hazardous liquids.
HFS flow switches can be installed outdoors and can be installed horizontally or vertically in pipelines.
The HFS flow switch is only used for operational control. It is necessary to strengthen the sense of responsibility and limit control of installation personnel, as well as the alarm monitoring system, to prevent the occurrence of control failures.
Note: The flow switch cannot be hit by water. If a quick closing valve is installed downstream of the flow switch, a throttle must be used.

3. Product features:
Shell protection level: IP54 Output form: Micro switch SPDT output
Contact life: 100000 uses. Medium temperature range: -10~105 ℃
Working medium: air, water, and oil Micro switch parameters: 5A (max), 250VAC/DC
Maximum pressure: 15 bar, material: shell made of brass or stainless steel, baffle made of stainless steel

4. HFS series target flow switch specifications and models:

model	interface dimensions	Number of flow charts	Factory settings (N)		Airtight test pressure (Mpa)		Remark
			Cut off min	Connect Max
					Max	min
HFS-10	G3/8 "-19 teeth	One fixed pulp sheet	zero point five	one point five	one point six	one	Original copper valve body
HFS-15	G1/2 "-14 teeth	One fixed pulp sheet	zero point five	one point five	one point six	one	Original copper valve body
HFS-20	G3/4 "-14 teeth	One fixed pulp sheet	zero point five	one point five	one point six	one	Original copper valve body
HFS-25	G1 "-11 teeth	One fixed pulp sheet	zero point five	one point five	one point six	one