There are generally the following reasons why hydraulic stations do not maintain pressure:
1. Internal air leakage in the grinding roller leads to pressure relief. Track the usage of oil and observe whether there are any oil leakage areas in the grinding roller. If there are any, deal with them;
2. The load should be stable, frequent changes can lead to pressure loss;
3. The slide valve type directional valve itself does not maintain pressure, because there is relative sliding between the valve core and the valve body, there must be clearance;
4. Hydraulic control one-way valves (or other one-way valve type pressure maintaining valves) have hard impurities in the valve core and body due to contamination, resulting in poor sealing;
5. Due to the influence of temperature, the volume of oil changes, causing pressure changes in the sealing part. The less oil is sealed, the more obvious the changes;
6. Any valve theoretically maintains absolute pressure, but there may still be slight leaks over time.
2026 August 1st Week VAFEM Product Recommendation
A linear-motion bearing or linear slide is a bearing designed to provide free motion in one direction. There are many different types of linear motion bearings. Motorized linear slides such as machine slides, X-Y tables, roller tables and some dovetail slides are bearings moved by drive mechanisms. Not all linear slides are motorized, and non-motorized dovetail slides, ball bearing slides and roller slides provide low-friction linear movement for equipment powered by inertia or by hand. All linear slides provide linear motion based on bearings, whether they are ball bearings, dovetail bearings, linear roller bearings, magnetic or fluid bearings. X-Y tables, linear stages, machine slides and other advanced slides use linear motion bearings to provide movement along both X and Y multiple axis.
2026-08-07