Vickers DG4V3, DG4V-3, Hydraulic AC/DC Solenoid Terminal Assignment Central Connection Directional Control Valve

The DG4V-3 series of hydraulic AC/DC solenoid terminal assignment central connection directional control valves are controlling the cylinder movement actuation or stop situation. There are several spool position of the directional control valves while in central of the valve housing.

We produce the valve in high precision machine to keep all the key dimensions, but if the machining accuracy of the hydraulic control valve is not high, the axis of the spool and the axis of the valve sleeve is no overlap to an axis, which produce the eccentric. According to calculations, the amount of leakage in the maximum eccentricity of the case is 2.5 times as much as the amount of leakage of concentric rings. Therefore, in order to reduce internal leakage should spool valve sleeve as close as possible to the state of absolute concentricity. Have higher requirements on the processing equipment and testing equipment. We are using new CNC high precision machines, CNC centers as well as a professional full product testing system to ensure the machining accuracy of the hydraulic solenoid directional control valves.


Vickers DG4V3, DG4V-3, Hydraulic AC/DC Solenoid Terminal Assignment Central Connection Directional Control Valve

If the spool is hard enough, these impurities are not usually to be the great harm to spool surface, but will lead to the hydraulic spool stuck in a position unable to move. If the hardness is low , the impurities is easy to wear the spool on its surface, leaving a gap , and accumulated to a certain extent, causing the spool uneven , thereby the leakage increases the problem described above.
The hardness of the raw materials in hydraulic valve will have an important impact on the internal leakage. Friction contact with the shoulder of the valve sleeve and spool poorly designed as a result of the spool pressure imbalance, lower hardness in a relatively shorter period of time greater wear , not only a direct result of the leakage gap increases, and this imbalance wear further exacerbate the eccentric. The hydraulic valve inevitably mixed with certain impurities, such as the processing of iron filings.

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