Solenoid Operated Valves

Curtiss-Wright's range of Solenoid Operated Valves come from the product brands -

  • Target Rock
  • Valve Group Korea

We are a leading supplier of top quality critical service valves for the engineering and nuclear safety markets. We are also well known for designing, manufacturing, and supplying control valves to the power, oil, and petrochemical processing markets.

View our range of solenoid-operated valves below:

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Target Rock Valve Group - Korea

SOLENOID VALVEs: mechanism & Functionality

Valve Functionality 

Solenoid Valves are valves operated electro-mechanically. The solenoid component is an electromagnet comprised of an insulated copper wire coil, which channels an electric current through it to control the valve. The valve itself is designed to control the flow of either liquid or gas. It can be typically used in scenarios where safe switching, high reliability, & long service life are essential.

Solenoid valves can vary for several reasons: the electric current they use, the strength of the magnetic field they can generate, how they regulate fluid/gas, and the type and nature of the substance they control.

Valve Mechanism

They also use a variety of mechanical actions, from linear, plunger-type actuators like our range, to rocker actuators and a sliding action. Solenoid valves use a two-port design to regulate flow or use a three or more port design to switch flows between ports and it's Multiple solenoid valves can be placed together on a manifold. Our models are all two-port designs, used either for isolation or control purposes.

Features & benefits of Solenoid Valves

Fast and safe switching
High reliability
Long service life
Good medium compatibility
Low control power 
Compact design.

Suitable Solenoid VALVE Applications

Solenoid Valves are used extensively in many devices and a range of industries. This includes devices that use hydraulics, pneumatics, and locking mechanisms and in the automotive, nuclear, and aviation sectors.


Some application examples include:

Oil, gas and petrochemical applications
Light volatiles
Jet fuel

Applications in Nuclear Power plants include:

Emergency feedwater control valve
Pressurizer spray valve
Safety injection control valve
Containment Isolation
Reactor head vent
Power-operated relief valve

TYPES of Solenoid Valves

Solenoid Operated Valves are typically divided into two categories:

  1. Direct operated
  2. Pilot operated

They can also serve as an isolation valve which operates on an on/off or open/closed basis, or as a control valve, which can be set to a specified value.


Direct acting solenoid valves

Often used in a smaller gauge, lower pressure environments, direct acting solenoid valves are simple to control and are suitable for a large range of applications and operating environments. The direct action of the seal on either the moving or fixed core requires more power than the pilot-operated alternative. They can, however, operate with little to no pressure and even in a negative pressure or vacuum environment.
Related Products: Model ZEV, Model-IV

Pilot operated solenoid Valve

More suitable for larger pipe sizes where the increased volume doesn't negatively impact the operation of the valve as pressure provided by the medium is 'borrowed' to lif the diaphragm enough to allow media to flow. This also means that the coil doesn't have to do as much work, and requires less power to operate.
Related Products: Model 100-CV


We supply a variety of world-leading brands, including:


What is a solenoid valve used for?

Solenoid valves control the flow of liquid or gas in a pipe by closing, opening, distributing, or mixing, depending on the valve type. 

  1. A 2-way valve is used to open or close the orifice
  2. A 3-way valve is used to open, close, distribute, or mix media

How do solenoid valves work?

Solenoid valves work by opening or closing an orifice in a valve body, which either allows or prevents liquid or gas flow through the valve.


A Solenoid valve consists of a coil, plunger, and sleeve body. A plunger opens or closes the orifice by raising or lowering within a sleeve tube by energizing the coil.


What are the types of solenoid valves?

  • Direct-acting valves - In direct-acting valves, a coil magnetically opens the valve, lifting the plunger and the valve’s seat, allowing flow to pass through without depending on external pressure.
  • Pilot-operated valves - Pilot-operated valves are used for flow in one direction; the solenoid activates a significantly smaller pilot valve, opening a larger valve operating at much higher pressure. 
  • Two-way valves - On a two-way valve, each port is alternately used to allow or prevent flow. In its operation, a two-way valve can be specified to be either normally open or normally closed.
  • Three-way valves - A three-way valve comes with three ports; these are commonly used when alternate and exhaustive pressure is required. This valve type is designed to open, close, distribute or mix media. 

Why are solenoid valves important?

Solenoid valves are a control element for fluidics. A solenoid valve is a good option when the fluid flow in a valve has to be controlled automatically. Their use in various plants and equipment steadily increases because they can shut off, release, dose, distribute or mix fluids. The variety of available designs enables a valve to be selected to suit the application in question. They offer a control element to applications that have flow or fluid power that must be monitored. 

Do solenoid valves reduce flow rate?

Solenoid valves are electrically operated devices used to control flow. They are used for the remote on/off or directional control of liquids, gases, and steam. They do not regulate flow.

What is a pneumatic solenoid valve?

A pneumatic solenoid valve is used to direct or stop compressed airflow in a pneumatic system. They are characterized by a standard numbering system consisting of two numbers. The first number represents the number of ports valve has, and the second number represents the number of states the valve has. 


Curtiss Wright Valves Division provides specialized and innovative valve technologies to markets worldwide. Our highly engineered valve solutions are utilized in critical systems to improve operations’ reliability and safety in the industries we serve.


Our extensive product range includes: 


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