Solenoid Valves
Solenoid Valve | Normally Closed Brass Body | 12V 24V 220V Water Air
CMP-04535SOLE-00001
£13.99
Solenoid Valves
3 products available
Solenoid valves are electromechanical components used to automate the control of fluid and gas flow in machinery and industrial systems. These electric solenoid valves use a coil to generate a magnetic field, which operates a plunger to open or close the valve. They are fundamental for MRO tasks and new equipment builds in applications requiring reliable, automated flow control.
Compel stocks a focused selection of industrial solenoid valves for common applications. Our range centers on normally closed (NC), 2-way solenoid valves with brass, alloy, or plastic bodies. We carry standard port sizes including 1/4, 1/2, and 3/4 inch, and support common control voltages like 12V DC, 24V DC, and 220V AC. We provide dependable, standard-configuration valves for immediate dispatch to trade and industry customers.
Valve Operation: Normally Closed and 2-Way Function
Understanding the valve's default state and flow path is the first step. The most common type, and our primary offering, is the normally closed (NC) valve. An NC valve remains shut when no power is applied, preventing flow. When the coil is energized, the valve opens. This fail-safe design is suitable for applications where flow must stop during a power outage.
Our valves are 2-way, meaning they have two ports: an inlet and an outlet. They function as a simple on/off switch for the fluid or gas line. While 3-way solenoid valves exist to divert flow between ports, the 2-way configuration is the standard for most isolation and control tasks.
Material Compatibility for Your Fluid or Gas
The valve's body material must be compatible with the media it will control to prevent corrosion and ensure a long service life. The choice between brass, plastic, or alloy depends on the fluid type, pressure, and operating environment.
For pneumatic solenoid valves controlling air or for general water applications, any of our materials are suitable. For hydraulic solenoid valves or lines carrying oil, a metal body is required.
- Brass: A strong choice for water, air, and oil. It offers excellent durability and is common in plumbing, heating, and non-corrosive hydraulic systems.
- Alloy: Provides a good balance of performance and cost for general-purpose use with air, water, or oil.
- Plastic: A lightweight and cost-effective option suitable for water and air, particularly in systems like solar water heaters or where metal is not required.
Selecting Port Size and Electrical Voltage
To ensure proper flow and simple installation, the valve's port size must match your pipe or tube diameter. Our selection covers the most common sizes for industrial machinery: 1/4 inch, 1/2 inch (G1/2''), and 3/4 inch (G3/4''). Choosing the correct size avoids flow restriction and the need for extra fittings.
The valve's coil voltage must match your control system's power supply. We offer valves for standard AC and DC voltages. DC options (12V, 24V) are typical for mobile equipment or PLC-controlled systems, while AC options (110V, 220V) are used for machinery powered directly from the mains.
Buying guide
Choosing Solenoid Valves
- What is the difference between a Normally Closed (NC) and Normally Open (NO) valve?
- A Normally Closed (NC) valve is shut when de-energized and opens when power is applied to the coil. A Normally Open (NO) valve is the opposite. Our core range consists of NC valves, which provide a fail-safe closed state for many applications.
- How do I select the correct port size for my application?
- You should match the valve's port size to the nominal diameter of your pipework. We stock common sizes including 1/4", 1/2" (G1/2), and 3/4" (G3/4). Using the correct size ensures the specified flow rate and avoids pressure drops.
- Which valve material is best for controlling oil?
- For most oils, a valve with a brass or alloy body is the correct choice. It is also to verify the seal material is compatible with the specific oil being used; check the product datasheet for this information.
- Can I use a single solenoid valve for both water and air?
- Yes, our general-purpose solenoid valves are rated for use with both water and air. Always check the product's datasheet to confirm that your operating pressure is within the specified limits for each medium, as they can differ.
- What happens if I use the wrong voltage on an electric solenoid valve?
- You must match the valve's voltage rating to your power supply. Applying a voltage that is too high will burn out the coil, causing permanent failure. A voltage that is too low will fail to actuate the valve.