Solenoid Directional Valve
A hydraulic solenoid directional valve is a solenoid controlled directional valve used in a hydraulic system for opening, closing or changing the direction of flow of the liquid. The valve operates with a solenoid, which is an electric coil wound around a ferromagnetic core at its center. The valve consists of various chambers also called ports. The solenoid is used for sliding the spool within the valve, opening or closing the ports. The spool is the cylindrical component which serves the function of the valve by either blocking or allowing the flow of liquid through these ports, depending upon its position.
Hydraulic solenoid valves are widely used in industries like manufacturing, aerospace, construction and many others that require hydraulic systems.
Directional control valves
The directional control valves are designed to start, stop or change the direction of the fluid flow. These valves are most commonly used in hydraulic and pneumatic systems. We discuss only the hydraulic applications for the purpose of this article.
Hydraulic solenoid valves
The hydraulic solenoid valve is a directional control valve widely used in hydraulic systems to change, allow or restrict the flow of liquid. The valve uses solenoids (X and Y) on either side of the valve for actuation as seen in the figure below. The valve consists of a cylindrical spool (Z) with land (larger diameter) and grooves (smaller diameter). The land blocks the flow while the groove allows the flow through the valve.