When choosing an oil filter, consider the following points:
1. The filtration accuracy should meet the predetermined requirements.
2. Can maintain sufficient flow capacity for a long time.
3. The filter element has sufficient strength and will not be damaged by hydraulic pressure.
4. The filter element has good corrosion resistance and can work permanently under the specified temperature.
5. The filter element is easy to clean or replace.
Therefore, the oil filter should be selected based on the technical requirements of the hydraulic system and its model based on filtration accuracy, flow capacity, working pressure, oil viscosity, working temperature and other conditions.