The Function and Functional Index of Oil Filter in Hydraulic System

The oil filter is a very important hydraulic accessory in the hydraulic system, because for the time being, controlling the cleanliness of the hydraulic oil and reducing hydraulic oil pollution means using an oil filter.

Function of oil filter

In a hydraulic system, due to formation within the system or intrusion outside the system, it is inevitable that there will be pollutants of one kind or another in the hydraulic oil. The particles of these pollutants not only accelerate the wear of hydraulic components, but also clog the small holes in the valve, jam the valve core, scratch the seal, cause the hydraulic valve to malfunction, and cause system failures. Therefore, the manufacturer of Wonpro reminds everyone that it is necessary to clean up impurities and particles of pollutants in hydraulic oil. Currently, the most effective method to control the cleanliness of hydraulic oil is to use an oil filter. The main function of the oil filter is to filter the hydraulic oil and control the cleanliness of the oil.

The main functional indicators of the oil filter include filtration accuracy, flow capacity, pressure loss, etc., with filtration accuracy as the main indicator.
① The working principle of the filtering accuracy oil filter is that the filter element with a certain size of filtering holes filters dirt. The filtration accuracy refers to the maximum size of impurities particles filtered by the oil filter from the hydraulic oil (expressed by the uniform diameter d of the dirt particles).
② Flow Capacity The flow capacity of an oil filter is generally expressed in nominal flow, which is proportional to the filtering area of the filter element.
③ Pressure loss refers to the pressure difference between the inlet and outlet of the oil filter at the rated flow rate. Generally, the better the flow capacity of the oil filter, the smaller the pressure loss.
④ Other Functions The other functions of an oil filter mainly refer to qualitative indicators such as filter element strength, filter element life, and filter element corrosion resistance. These functions of different oil filters can vary greatly. Their advantages and disadvantages can be determined by comparison.