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What is the Solenoid Valve

What is the Solenoid Valve

A Solenoid Valve is the control element with diverse uses in fluidics processes. It is mainly responsible for the release, shut-off, distribution, dosing, or mixing of the fluids and controls the fluid flow automatically.

BSTC Group is well known manufacturer and supplier of high-quality Solenoid Valves worldwide in different designs and varieties. We have a huge product list with long durability, high efficiency, and budget-friendly. Some of them include electricity butterfly valves, self-regulated controlled valves, and pneumatic butterfly valves.

This well-researched FAQ guide is a detailed guide to Solenoid Valve, its introduction, features, types, working principle, applications, installation, and much more.

What is a Solenoid Valve?

A Solenoid Valve has a coil that is operated and controlled electrically and has a centrally located plunger (ferromagnetic core). During the resting phase, a small orifice is closed by the plunger. The magnetic field is generated by an electric current that passes through the coil.

The upward and downward force acting on the plunger helps open and close the orifice. Different Solenoid Valve varieties use different types of actuators, including rocker, pivoted-armature, and plunger-type actuators, adding variation to the operation mechanism.

Two-port and multi-mode designs are available for switching the flow between the inlet and outlet ports. It offers high reliability and durability, good medium compatibility, modern and compact construction, and efficient switching.

What are the Excellent Features of a Solenoid Valve?

Some of the excellent features of a Solenoid Valve are:

Electric Power Decrease

A short current pulse is installed for the Solenoid Valve’s opening or closing. By holding it in that position, electric power is decreased, which is great for energy conservation.


The pulse coil version or latching is great for low-frequency switching applications. A short electric pulse energizes the Solenoid Valve for moving the plunger.

To maintain the position, a permanent magnet eliminates the need for an additional magnetic field or spring. As a result, the valve’s heat development and power consumption are decreased.

High Pressure

It can withstand high pressure up to 250 bar.

Manual Override

This feature improves testing, commissioning, power failures, and maintenance experiences by providing ease and safety. In some models, if the manual control is locked, the valve cannot actuate electrically.

Media Separation 

This feature helps isolate the working parts from the media, preventing media contamination.


For rough vacuums, models with no minimum pressure differential requirements are the most suitable. A semi-direct or direct-acting Solenoid Valve is most suitable for such applications. Special vacuum versions can also be used for stringent leakage rate demands.

Adjustable Response Time

This is the adjustable time taken for the opening or closing functions. For this, you just need to rotate the screws on the body of the Solenoid Valve.

Position Feedback

Optical or electrical position feedback indicates the switching status as a NAMUR or binary signal. NAMUR is the sensor’s output showing off or on the state.

Low Noise

With a damp construction design, the closing noise is reduced significantly.

What are the Materials Used in the Construction of a Solenoid Valve?


The materials for Solenoid Valve construction are chosen based on the application they will be used for. These materials must be carefully selected to optimize fluid compatibility, cost, functional reliability, and service life.

Body Materials

  • Bronze and brass for neutral fluids.
  • Steel with steam corrosion resistance for high-temperature fluids.
  • Polyamide material for economic reasons.

Actuator Materials

Corrosion-resistant steel is used in constructing the actuator, which will make contact with the fluid. As a result, the actuator can resist corrosive attacks by mild or neutrally aggressive media.

What are the Major Components of a Solenoid Valve?

Different components join together to make a Solenoid Valve. Some of these components are:

  • Solenoid Subassembly
  • Core Tube
  • Shading Coil
  • Plugnut
  • Solenoid Coil
  • Core Spring
  • Bonnet
  • Core
  • Hanger Spring
  • Diaphragm
  • Backup Washer
  • Bleed Hole
  • Valve Body
  • Disk
  • Seat
Components of a Solenoid Valve

What are the Main Terms Related to a Solenoid Valve?

Some main terms related to a Solenoid Valve are:

· Response Time

The time between completion of mechanical closing and opening and the application of the switching signal.

· On Period

The time between the current on and off.

· Cycle Period

The total time of the de-energized and energized periods.

· Viscosity 

It is the flow of fluid through the pipes. The voltage tolerance is compromised in case of higher viscosities, but the response time is improved.

Conclusion :

Different Solenoid Valve varieties are available in the market, so you must choose the specific variety that best suits your application. Ensure you maintain the pressure range, flow rate, thermal effects, and temperature range settings for efficient operation and results.

BCST can help you to customize your Solenoid Valve according to the requirements of your industrial applications. To get your customized Solenoid Valve at a reasonable cost, contact us at [email protected]. Our professional customer care service is available 24/7 to entertain your queries.

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