Excavator accessories hydraulic pump proportional solenoid valve 24V 1013365

Solenoid valve classification and their respective working principles
Solenoid valve classification and their respective working principles are described as follows:
1, indirect pilot solenoid valve
The series solenoid valve is composed of a pilot valve and a main valve spool connected to form a channel; Normally closed type is closed when there is no power. When the coil is energized, the magnetic force generated makes the moving core and the static core pull, the pilot valve port is opened, and the medium flows to the outlet. At this time, the pressure on the upper chamber of the main valve core is reduced, lower than the pressure on the inlet side, forming a pressure difference to overcome the spring resistance and then move upward to achieve the purpose of opening the main valve port, and the medium flows. When the coil is powered off, the magnetic force disappears, the moving iron core resets and closes the pilot port under the action of the spring force. At this time, the medium flows into the balance hole, the pressure on the upper chamber of the main spool increases, and moves downward under the action of the spring force to close the main valve port.

2, direct acting solenoid valve
There are normally closed type and normally open type two. The normally closed type is closed when the power is off, and the electromagnetic force is generated when the coil is energized, so that the moving core overcomes the spring force and the static core draws directly open the valve, and the medium is a path; When the coil is powered off, the electromagnetic force disappears, the moving core is reset under the action of the spring force, and the valve port is directly closed, and the medium is blocked. Simple structure, reliable operation, normal operation under zero pressure difference and micro vacuum. Normally open type is the opposite. If less than φ6 flow diameter solenoid valve.
3, step direct acting solenoid valve
The valve adopts a primary opening valve and a secondary opening valve connected in one, the main valve and the pilot valve step by step to make the electromagnetic force and pressure difference directly open the main valve port. When the coil is energized, the electromagnetic force is generated to pull the moving core and the static core, the pilot valve port is opened and the pilot valve port is located on the main valve port, and the moving core is connected with the main valve core. At this time, the pressure of the main valve chamber is discharged through the pilot valve port, and the main valve is moved upward under the pressure difference and the electromagnetic force at the same time, the main valve media flow is opened. When the electromagnetic force disappears when the coil is powered off, the moving iron core closes the pilot valve hole under the action of self-weight and spring force. At this time, the medium enters the upper chamber of the main valve core in the balance hole, so that the pressure of the upper chamber increases. At this time, the main valve is closed under the action of spring return and pressure, and the medium is cut off. The structure is reasonable, the operation is reliable, and the work is also reliable at zero pressure difference