The choice of filtration accuracy is mainly affected by two factors.
- Application of oil. For example, insulating oils must pass high-precision filtration to achieve high insulation values, while large-modulus gears require much more impurities.
- The viscosity of the oil. High viscosity oils cannot pass through the fine mesh and require reduced precision.
If only emphasize on the cleanliness of the oil, and use the precision filter, it will inevitably increase the running cost. The reasons are as follows:
- The filter element is often clogged. Need to clean or even replace the filter element.
- Increase the axial pressure so that the oil can pass through the filter faster, but it tends to crush the filter.
- Add a preheating tank to increase the temperature and reduce the viscosity.