When energized, a magnetic field builds up, which pulls a plunger or pivoted armature against the action of a spring. The actuator inside a solenoid valve takes the form of an electromagnet. Solenoid valves are control units which, when electrically energized or de-energized, either shut off or allow fluid flow. Solenoid valve connectors are used to connect solenoid valves and pressure switches.

If a two-way solenoid valve is used, two separate valves are not needed in this application. A solenoid valve can be used to allow air pressure to close the gripper, and a second solenoid valve can be used to open the gripper.

A gripper for grasping items on a robot is frequently an air-controlled device. A computer running an automation program to fill a container with some liquid can send a signal to the solenoid valve to open, allowing the container to fill, and then remove the signal to close the solenoid valve, and so stop the flow of liquid until the next container is in place. Solenoid valves are used wherever fluid flow has to be controlled automatically, such as in factory automation. A typical flow control system with solenoid valve. The generated magnetic field actuates the ball valve that can change states to open or close the device in the fluid direction indicated by the arrow.įigure 4.16. A coil inside the solenoid valve generates a magnetic field once an electric current is flowing through. Figure 4.16 shows the application of a solenoid valve in a typical control system. In this control system, a spring is used to return the actuator and valve back to their resting states when the current flow is removed.

This mechanical valve then opens or closes and so allows a liquid or gas either to flow through, or be blocked by the solenoid valve. The actuator is mechanically linked to a valve inside the solenoid valve.

The electrical device causes a current to flow through a coil located on the solenoid valve, which in turn results in a magnetic field that causes the displacement of a metal actuator. A solenoid control valve is a kind of isolation valve that is an electromechanical device allowing an electrical device to control the flow of gas or liquid.

Electric solenoid valve diaphram