The oil filter element is mainly used to filter the oil in the hydraulic system. It is installed in the filter and oil filter in the hydraulic system.

According to the installation position of the hydraulic oil filter element in the hydraulic system, the hydraulic oil filter element is divided into suction oil pipe filter element, pressure oil pipe filter element and oil return oil pipe filter element.

The hydraulic oil filter element in the suction tubing line: in order to protect the hydraulic pump, the oil filter element needs to be installed in the suction tubing line (oil tank - hydraulic pump inlet) or directly in the tank, the accuracy is generally 100,180 μm, according to the different self-priming capacity of the pump. Excessive flow resistance leads to cavitation of hydraulic pump.

Pressure pipeline hydraulic oil filter element: pressure pipeline hydraulic oil filter element is not only to protect its downstream components, but also the main oil filter of the oil pollution degree of the system. Through its own effective purification of oil, it also plays a very good protection role for hydraulic pump. If the filtration accuracy is 5-10μm, the filter is subjected to a lot of pressure and vibration. The allowable differential pressure of the oil element in the pressure pipeline is in the range of 0.3, depending on the pressure class, and the allowable differential pressure of the oil filter in the pressure pipeline for surface equipment is 0.7 mpa. Considering cost and installation space, bigger is bigger.

Since there is no unified classification method for filters, it can be classified and summarized from the characteristics of various filters. In addition to the classification according to the installation position and filtration accuracy, it is often classified according to the connection form of the filter, the pressure grade of the filter, the number of the cylinder of the filter, etc.

According to the inlet and connection form, the filter can be divided into tubular connection filter and plate connection filter. Tubular filters are oil inlet and ****** connected by opposite pipes and connected by flange, metric thread or tubular thread. Plate filter refers to the inlet and in the same plane, fixed with bolts.

The other distribution is that according to the number of cylinders, the single shell single filter element is called the single cylinder filter, with two cylinders and two shells; The filter element is called double barrel filter, which can be changed when the equipment is running continuously.

According to the pressure level, the filter is divided into three categories: high pressure filter, low pressure filter and medium pressure filter. The difference between the three filter standard line is 16Mpa and 1.6Mpa, pressure greater than 16Mpa is called high pressure filter, pressure less than 16Mpa but greater than 1.6Mpa is called low pressure filter, pressure less than 1.6mpa is called low pressure filter.