Jery Solenoid Valves is leading manufacturers of combustion, industrial, medical and laboratory gas control solenoid valves. Whether designing solutions for stand-alone valves or a customised OEM installation we have developed an enviable reputation for quality products, reliability and innovation. With facilities based in the Ningbo, We set up long time cooperation relationship with many countries in Southeast Asia, Middle East, Central Asia, North America, South America, Europe, etc., we can provide solenoid valves to function in the most arduous of conditions and extreme temperatures, anywhere in the world. Our product line covers a full range of valves for general

Solenoid Valve Components

Solenoid valves consist of a coil, plunger and sleeve assembly. In normally closed valves, a plunger return spring holds the plunger against the orifice and prevents flow. Once the solenoid coil is energized, the resultant magnetic field raises the plunger, enabling flow.

It is made up of two main parts: the solenoid; an electric coil with a movable ferromagnetic core in its centre, and an iron plunger that is allowed to move through the centre of the coil.

The different parts of a solenoid valve work together to ensure the optimal operation of the valve. Proper care must be taken to ensure that the parts are installed correctly. Missing or incorrectly installed components can cause a valve to malfunction. Read our article on solenoid valve installation for more information on the installation procedure.

Inlet port

The media enters the valve through the inlet port, after which it encounters the closing or opening functions of the valve. The media to be controlled enters the valve through a pipe or hose connected to the valve’s inlet port.

Outlet port (B)

The regulated fluid flows out of the valve through the output port. The output port receives the media that has been allowed to flow through the valve. A solenoid valve can have one or more outlet ports depending on the application. The valve media can be directed to one or more of these ports by the specific action of the valve. The regulated media leaves the valve through the pipe connected to the output port.

Seal (G)

The seal is the part that shuts off the valve preventing the flow of media through the valve. The plunger moves up in a normally closed valve as the valve is energized. The seal opens the orifice and allows the media to flow through the valve. If the valve is normally open, the plunger moves down, causing the seal to block the orifice, thereby preventing the flow of the media through the valve.

The seal comes in contact with the medium to be controlled. Therefore, it is crucial to ensure that the seal material is compatible with the chosen valve media. Also, the seal should be kept free from dirt to prevent the partial opening and closing of the valve.

Orifice

The orifice connects the inlet and outlet ports. The plunger operates this orifice, restricting the flow of media in and out of the valve. A solenoid valve can have one or more orifices depending on the working principle employed and the required action.

Nut: Holds the coil onto the valve and threads over the stop piece of the guide tube assembly.  

 Housing: Metal plate that covers the coil and helps complete the magnetic circuit created by the coil when energized.  

Flux Plate: Metal plate that helps complete the magnetic circuit with the housing.

Guide Assembly: Metal tube that internally houses the plunger, and acts as the external mounting post for the coil.  The magnetic stop piece is welded to the top and the flange is welded to the bottom.  

Coil: Element of the valve that when energized creates a magnetic field.  Comprised of copper magnet wire spooled around a bobbin.  

Plunger Assembly: Magnetic plunger, including the plunger seal and spring.  

O-Ring: Seal material that prevents the fluid from leaking external to the valve.  This seals the guide tube flange to the valve body.  

Body: The portion of the valve that has the plumbing connections and also the seat for the plunger to seal on.

  Lead wires

The lead wires connect the valve externally to the power supply directly or through a connector when the valve is energized. The current flow stops when the power is switched off.

Materials and Construction

Solenoid valves are often available with various housing materials. Typical materials are Nylon (Polyamide – PA), PVC (PolyVinylChloride), Brass, Nickel plated brass and Stainless Steel (304 and 316). The material choice depends strongly on the chemical properties and the temperature of the medium.

Common Applications

Solenoid valves are used in fluid power pneumatic and hydraulic systems, to control cylinders, fluid power motors or larger industrial valves. Automatic irrigation sprinkler systems also use solenoid valves with an automatic controller, used for wherever fluid flow has to be controlled automatically. They are being used to an increasing degree in the most varied types of plants and equipment. The variety of different designs which are available enables a valve to be selected to specifically suit the application in question.

Dishwashers and washing machines use solenoid valves to control the flow of water. Air conditioning systems use solenoid valves to control air pressure. Solenoid valves are used in automatic locking systems for door locks.