If the workings of a system or process necessitate the distant controlling of air, liquid, vacuum, or gas, the appropriate choice of a solenoid valve can greatly affect the eventual performance of the machine, system, or process on the whole. Looking into the parts of this control valve will facilitate understanding of the significant functions and useful operations of a valve.
This is an illustration of a normally closed, direct-acting solenoid valve with indicated parts as follows:
1. Valve body
The solenoid valve is attached to the valve body. The valve is hooked up in the process controlling the flow of liquid, air, or gas.
2. Inlet port
The fluid goes into the inlet port within the automatic valve gaining entry to the eventual process.
3. Outlet port
The fluid flowing through the automatic valve goes out by means of the outlet port connecting to the process necessitating fluid.
4. Coil Solenoid
The steel-covered cylindrical solenoid coil of wire inside the valve serves as current-carrying coil functioning like a magnet as the current goes through.
5. Coil windings
The completed solenoid coil assembly is comprised of a tightly packed helix or series of turns of enameled wire circling the ferromagnetic material like steel. A plunger or piston may be found within the hollow portion of the coil. The spring controls the movement of the plunger or piston within the coil.
6. Lead wires
These are outer connections of the valve where the current from the power supply is passed through while the valve is energized. The current flow stops when the power is cut-off.
7. Plunger or piston
As the current passes through the control valve, it generates magnetic field within the hollowed space of the valve wherein the solid, cylindrical, metallic plunger or piston is placed.
This forces the plunger to control the fluid allowing the motion of the plunger or piston only when the current flows through the solenoid valve.
This serves to connect the inlet and the outlet ports. The spring and the current flowing through the valve control the movement of the plunger or piston which in turn controls the opening of the orifice.
At the onset the sensor senses the process going through the outlet of the valve. As the sensor senses that the fluid is no longer needed, it terminates the current flow to the valve. In turn, the valve loses supply of power and the plunger or piston goes to the bottom and closes the orifice. This discontinues the flow of fluid from the inlet to the outlet ports.