Feature

●Safe, long service life: 2021 Improved Version, Adjustable flow control value and stable action point. Protection class IP54, micro switch contact life up to 100,000 times.
●Application: This product is used to measure the fluid dynamics of fluids passing through pipes such as water, ethylene diluents, glycols and other liquids that do not corrode copper.
●Suitable for:Water flow switch is suitable for water treatment systems, central air conditioning, water cooling equipment.
●Location of use:Flow switches are typically used in locations that require interlocking or "cut" protection.
●When the flow exceeds the set value, the fluid drives the blades and the microswitch, and the SPDT contact can connect the circuit and disconnect other circuits.


Description

Specification:
Model: HFS-20
Switch type: SPDT
Material: 304 stainless steel body, copper connector,  phosphor bronze bellows
Weight: Approx.401g/ 14.1oz
Connector: 3/4"
Max.working pressure: 1.0MPa
Ambient temperature: 0~60℃
Liquid temperature: -10~100℃
Micro switch contact life: 1000000 times
Micro switch Voltage: 220VAC
Micro switch Current: 15A

Package List:
1 * Water Flow Switch
3 * Paddle
1 * User manual

Installation method:
1. Open the flow switch
2. The switch has been set at minimum flow rate. Turn the adjusting screw counterclockwise to increase the flow setting value.
3. Press the target to check whether the micro switch can work normally. Excessive clockwise rotation of the adjusting screw may lead to the failure of the flow switch.
4. After the installation, please press the lever of the flow switch several times to check. If there is no "click" sound, turn the adjusting screw counterclockwise until there is "click" sound.
5. The adjustment screw of lacquer seal is only used for the first time to adjust the state of flow switch. Please do not change or adjust it.
6. Observe three operating cycles to ensure that the switch and the system to which it is connected are operating properly and cover the switch enclosure promptly.

Note:
1. Please check the flow switch carefully before installation.
2. Flow switch can be installed in horizontal pipeline or vertical pipeline with upward liquid flow direction, but not in pipeline with downward liquid flow direction. When installed in the pipeline with upward liquid flow direction, the gravity effect should be considered.
3. HFS flow switch could not be used in the pipe which liquid temperature below freeing point.