Time:2023-04-19 13:25:26 Browse: 120
1. The casting quality inside the 315-ton hydraulic valve body or the integrated block body (such as air holes, cracks, shrinkage loosening, etc.) is not good, resulting in leakage and leakage of the connecting surface of the integrated block.
2. The seal of the O-shaped sealing ring on the outer cylindrical surface of the 315-ton hydraulic valve sleeve fails.
3. The valve core of the four-column hydraulic press is not close to the cone surface of the valve sleeve, resulting in internal leakage between cavity A and cavity B.
4. When the plug-in hydraulic control check valve with solenoid valve as the pilot valve is used to keep the pressure, the slide valve solenoid valve cannot be closed well because of the inevitable internal leakage.
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