The water solenoid valve is an automatic valve that uses electromagnetic force to control water flow switch, which is widely used in household appliances, industrial equipment and intelligent irrigation systems. Its high efficiency and convenience make it an important part of modern automation control. So, how does the water solenoid valve work? How to choose the right product for your needs? This article will explain it in detail.

1.Basic concept of water solenoid valve

‌water solenoid valve ‌ is an automatic component that uses electromagnetic force to control the flow of fluid, mainly used to control the flow of water or other liquids. The water solenoid valve controls the movement of the valve core through the magnetic field generated by the electromagnet, so as to realize the opening or closing of the valve. When the electromagnet is energized, the magnetic force generated attracts the spool and makes the valve open; When the power supply is disconnected, the magnetic force disappears, the spool returns to its original position, and the valve is closed.

2.Working principle

The work of the water solenoid valve is based on the principle of electromagnetic induction:

• Electromagnetic drive: When the coil is energized, a magnetic field is generated to attract the spool to move and open or close the valve.
• Valve type:

Direct acting: relying on electromagnetic force to switch directly, suitable for small flow, low pressure scenarios.

Pilot type: Use medium pressure auxiliary switch, suitable for large flow, high pressure environment.

Normally open type (open when power is off) and normally closed type (closed when power is off).

• Key components: solenoid coil, valve body, spool, spring and seal.

3.Main application scenarios

Household domain：

• Washing machine/dishwasher: automatic control of water and drainage.
• Smart toilet: Precise control of flushing water flow.
• Water purifier: Switch filtering and flushing modes.

Industrial field：

• Irrigation system: regular ration of water.
• Cooling equipment: Control coolant flow.
• Chemical pipeline: Precise regulation of liquid transport.

4.How to choose the water solenoid valve?

Pay attention to the following parameters when purchasing:

• Diameter (DN) : Match the pipe size (e.g. DN15, DN20).
• Voltage: Common AC 220V, DC 12V/20V/24V, need to match the control system.
• Material: Brass、Stainless steel、Plastic
• Protection level (IP) : IP65 or above in outdoor or humid environments.

5.Installation and maintenance

• Installation points:

Install in body arrow direction to ensure correct water flow.

Add filters to prevent impurities from clogging the spool.

• Maintenance Suggestions:

Check the seal ring regularly for aging.

Clean the filter screen to prevent particles from trapping the spool.

• Common faults:

Coil burn out: Check whether the voltage is stable.

Water leakage: Replace seal or valve body.

Water solenoid valves play a key role in automation control, whether it is household water or industrial processes, choosing the right model can greatly improve efficiency. If you have specific needs (such as smart home renovation or industrial equipment), welcome to leave a message for consultation!

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