What are the reasons why the cartridge valve of the stretch hydraulic press cannot maintain pressure?
- The casting quality of the valve body or integrated block of the stretch hydraulic press is not good (for example, air holes, cracks, shrinkage, etc.), causing leakage and leakage of the integrated block connection surface.
- The O-ring seal on the outer cylindrical surface of the hydraulic machine valve sleeve fails.
- The conical surface of the stretch hydraulic press valve core and valve sleeve does not fit tightly, causing internal leakage between cavity A and cavity B.
- When using a solenoid valve as a pilot valve for the cartridge-type hydraulic control check valve to maintain pressure, the spool-type solenoid valve inevitably has internal leakage and cannot maintain pressure well.
