A Complete Guide to Solenoid Valves in Irrigation Systems – Installation, Benefits & Maintenance

Efficient irrigation is the backbone of modern farming. Whether you’re managing a greenhouse, orchard, or open-field irrigation system, automating your water flow is key to saving time, labor, and water. One essential component in achieving this is the solenoid valve a small but powerful device that controls the flow of water electronically.

In this blog, we’ll walk you through everything a farmer should know about solenoid valves and how they integrate into irrigation systems.

What is a Solenoid Valve?

A solenoid valve is an electromechanically operated valve used to control the flow of liquids or gases. In irrigation, it is used to open and close water flow remotely or automatically, usually as part of a timer-based or sensor-controlled irrigation system.

How Does a Solenoid Valve Work?
The solenoid valve has two main parts:

• The Solenoid Coil – A coil of wire that becomes magnetized when electricity is applied.
• The Valve Body – Contains the internal passage and a plunger.

Working Principle:

1. When power is supplied to the coil, it creates a magnetic field.
2. This magnetic field lifts a small plunger or diaphragm inside the valve.
3. The lifted plunger opens the water path and allows flow.
4. When the power stops, the magnetic field disappears, the plunger drops, and water flow stops.

Why Use a Solenoid Valve in Irrigation?
Solenoid valves are essential for automated irrigation systems. They allow farmers to:

• Schedule water distribution using a controller.
• Avoid manual opening/closing of taps.
• Improve water use efficiency.
• Integrate sensors (moisture, rain, temperature) for smart irrigation.

Types of Solenoid Valves Used in Irrigation

• Normally Closed (NC) – Default position is closed; opens when energized. Most common in irrigation.
• Normally Open (NO) – Default is open; closes when energized.
• Direct-acting – No pressure is required to open the valve.
• Pilot-operated – Uses system pressure to open the valve; suitable for larger systems.

Choosing the Right Solenoid Valve for Your Farm

Before buying, consider:

• Valve Size (½”, ¾”, 1″, 1½”, 2″ etc.)
• Operating Pressure (in bar or PSI)
• Flow Rate (litres per minute)
• Voltage (12V DC, 24V AC – depending on your controller)
• Material (plastic, brass, stainless steel)
• Application (drip, sprinkler, mist, etc.)

How to Install a Solenoid Valve Correctly

Here are simple steps for correct installation:

1. Check the arrow on the valve body. It should point in the direction of water flow.
2. Use Teflon tape to seal threaded connections.
3. Connect wires to your controller as per the voltage specifications.
4. Test the valve manually before running automatic schedules.
5. Install filters upstream to avoid clogging the valve.

⚠️ Common Mistake: Installing the valve in the wrong direction. Always follow the arrow on the valve body.

Solenoid Valve Maintenance Tips

To keep your valve working optimally:

• Clean the filter regularly to avoid debris build-up.
• Check for leaks or unusual sounds.
• Ensure stable voltage to avoid burning the coil.
• Flush the system periodically.

Common Problems and Troubleshooting

Benefits of Using Solenoid Valves in Irrigation

• Automation – Set schedules and let the system water your crops.
• Precision – Deliver exact water volume when needed.
• Labor Savings – Reduce manual labor and human error.
• Water Conservation – Use moisture sensors to irrigate only when needed.
• Remote Control – Control from your phone with a smart controller.

At Bestfix Irrigation, we stock high-quality solenoid valves suitable for all types of irrigation systems from greenhouses to open fields.

We provide:

• Video demonstrations and on-site training
• Durable solenoid valves (1″, 1.5″, 2″ sizes available)
• Compatible irrigation timers and controllers
• Full installation support and technical advice

Solenoid valves are a game-changer for farmers seeking efficient, smart, and automated irrigation solutions. Whether you’re running a small vegetable farm or a large commercial greenhouse, incorporating solenoid valves will significantly improve your productivity and water management.

If you’re ready to automate your irrigation or need help choosing the right valve, contact Bestfix Irrigation today we’re here to guide and supply you every step of the way!

Call/WhatsApp: 0795 654 889
📍 Visit us along Eastern Bypass Kamakis next to Kidani Mabati Factory, Mapping Stage.