Solenoid Valve 24V DC 0.5 inch (1/2") - Industrial Water Flow Control Switch (Normally Closed)

Specifications

• Operating Voltage: 24V DC (Standard Industrial)

• Current Consumption: ~200mA to 300mA (Efficient low-current draw)

• Valve Type: Normally Closed (NC) - Stays closed when unpowered.

• Port Size: 1/2 inch (0.5") External Thread (G1/2)

• Working Pressure: 0.02 Mpa – 0.8 Mpa (Pressure required to actuate; NOT for gravity feed).

• Flow Character: Unidirectional

• Fluid Medium: Water / Low-viscosity fluids (0-60°C)

• Inlet Filter: Stainless steel mesh (Removable).

• Material: Reinforced Nylon Body, Brass/Steel Internal Plunger.

Key Applications & Projects

• PLC Automation: Directly integrate with 24V PLC Output Cards (Relay or Transistor type) to control cooling water for machinery.

• RO Water Purifiers: The standard inlet valve for many commercial and domestic Reverse Osmosis units.

• Truck & Bus Utilities: Ideal for windshield washer systems or auxiliary water tanks in 24V vehicles.

• Long-Distance Irrigation: 24V allows for thinner wires over longer distances compared to 12V systems due to lower current draw.

Unlock New Capabilities (Project Evolution)

• Prerequisite: You may have used 12V valves for small prototypes but found them struggling with voltage drop over long garden wires.

• The Upgrade: Switching to 24V DC reduces current by half for the same power, allowing you to place valves 20-30 meters away from your controller using standard cabling.

• Effort Level: Intermediate/Professional. Requires a 24V power source and appropriate switching logic.

Virtual Technician: Wiring & Safety Guide ⚠️

• Switching Logic: You cannot drive this directly from a 3.3V/5V microcontroller.

  • Recommended: Use a 24V Relay Module or an Industrial MOSFET Module (e.g., IRF520 module).

• Back EMF Protection: If building your own driver, you MUST use a flyback diode (1N4007) across the valve terminals to protect your switching transistor from high-voltage spikes when the valve turns off.

• Power Supply: Requires a 24V SMPS or Battery. Do not attempt to run on 12V; the magnetic field will be too weak to open the diaphragm against water pressure.

Accessories

• Included: 1 x Solenoid Valve 24V DC 0.5 inch (1/2")

• Required (Sold Separately):

  • 1-Channel Relay Module (5V or 12V)

  • 1/2" Female Threaded Pipe Connectors

  • Teflon Tape (for leak-proof sealing)

  • Waterproof Junction Box

Frequently Asked Questions (FAQ)

1. Will this work on a 12V system?

   • No. At 12V, the solenoid will not generate enough magnetic force to lift the plunger. It may click but won't open water flow.

2. Can I use this with a PLC?

   • Yes! This is designed for 24V PLC systems. Ensure your output card can sink/source ~300mA or use an interposing relay.

3. Does it work with Gravity Feed (0 PSI)?

   • No. It requires a minimum pressure (approx 3 PSI or 0.02 Mpa) to operate. It will not work for a tank just a few inches above the valve.

4. Is it suitable for continuous duty (Always ON)?

   • It can handle 1-2 hours ON time, but for 24/7 "Open" applications, a Motorized Ball Valve is superior as it doesn't heat up.

5. What happens if I connect it backwards?

   • Water will leak through even when the valve is closed. Follow the arrow on the bottom of the casing.

6. Can I use this for diesel or kerosene?

   • No. The rubber seals (usually NBR/EPDM) may swell or degrade with fuels. Use valves specifically rated for fuel.

   • Probots™ Material-Check ????: This valve is optimized for Water.

7. Is the coil replaceable?

   • In most units, the coil is removable, but we sell the complete unit. It's often cheaper to replace the whole valve.

8. How do I seal the threads?

   • Use Teflon (PTFE) Tape. Wrap 10-12 times clockwise around the male threads before screwing on the connector.

9. Can I use this for hot water?

   • Rated up to ~60°C. For boiling water or steam, you need a Brass/Stainless Steel valve with Viton seals.

10. Why is the 24V version better than 12V?

    • Efficiency. Higher voltage means lower current, which means you can use thinner wires for longer runs without losing power.

11. Is it polarity sensitive?

    • No. Being a simple coil, you can connect +24V and GND to either terminal.

12. What creates the "Water Hammer" noise?

    • Solenoids close instantly. This can cause a pressure shockwave (bang) in pipes. If this happens, install a water hammer arrestor.

13. Can I use this outdoors?

    • Only if installed in a Waterproof Box. The coil terminals will corrode if exposed to rain.

14. Is it food safe?

    • No. It is industrial-grade plastic. Do not use for dispensing beverages.

15. What is the max pressure?

    • 0.8 Mpa (approx 116 PSI). Standard household water pressure is usually 40-60 PSI, so it's well within range.

16. Does it need lubrication?

    • No. The water itself acts as the lubricant for the internal plunger.

17. Why does it hum?

    • AC valves hum; DC valves (like this one) should be silent. If it hums, check if your power supply has "ripple" or is unstable.

18. Can I control flow speed?

    • No, it is strictly ON/OFF.

19. What is the port thread standard?

    • G1/2 (BSP Parallel). Compatible with standard hardware store plumbing fittings.

20. How do I clean the filter?

    • Unscrew the water inlet pipe, and use pliers to gently pull the metal mesh out. Rinse and re-insert.