Electric hydraulic valve
A hydraulic solenoid valve is an electromechanical directional control valve that manages hydraulic fluid flow. Its core consists of a metal body typically cast iron or steel, a spool a movable cylindrical component made of hardened alloy steel, and one or more solenoids coils. The spool is installed within the body with precise machining tolerances usually on the order of microns and is sealed without gaskets, necessitating excellent oil filtration to prevent wear.
Upon energization with a standard voltage e.g., 12VDC, 24VDC, 110VAC, or 220VAC, the solenoid generates a magnetic field. This field displaces the ferromagnetic core inside the solenoid, which directly or indirectly actuates the spool. The linear displacement of the spool opens or closes flow paths between the pressure port P, tank port T, and work ports A and B. In common designs, one or two springs on either side of the spool return it to the neutral position e.g., closed center when de-energized.
