How to choose when purchasing hydraulic oil filter elements?

The hydraulic oil filter element is an indispensable part of the pipeline series for the conveying medium. It is usually installed in the inlet filter of the hydraulic system to filter out metal particles and pollution impurities in the fluid medium and to protect the normal operation of the machinery and equipment.

The application range of hydraulic oil filter elements is very wide, covering almost all walks of life: iron and steel, electric power, metallurgy, shipbuilding, aviation, papermaking, chemical industry, machine tools and construction machinery, construction machinery and other fields.

Under normal circumstances, the selection of hydraulic oil filter elements must have sufficient filtration accuracy and oil flow capacity, and the filter elements should be easy to clean or replace. But it depends on the specific situation. For example, the general oil suction filter is relatively rough, while the pressure filter is relatively fine. In addition, the filter element should be strong enough not to be damaged by pressure.

Make detailed comments on several common oil filters and their filter element structures.

(1) Mesh oil filter element: the filter element uses copper mesh as the filter material, and is wrapped with one or two layers of copper wire mesh on a plastic or metal cylindrical frame with many holes around it, and its filtration accuracy depends on the copper mesh. The number of mesh layers and the size of the mesh. This kind of oil filter has simple structure, large flow capacity, and is easy to clean, but has low filtration precision, and is generally used for the oil suction port of a hydraulic pump.

(2) Sintered oil filter element: the filter element is sintered with metal powder, and uses the micropores between the particles to block the passage of impurities in the oil. The filter element can withstand high pressure, has good corrosion resistance and high filtration precision, and is suitable for high-pressure and high-temperature hydraulic systems requiring fine filtration.

(3) Paper oil filter element: the filter element is a paper core made of plain or corrugated phenolic resin or wood pulp microporous filter paper, and the paper core is surrounded by a skeleton made of tinned iron with holes to increase Great intensity. In order to increase the filtration area, the paper core is made into a folded shape. Its filtration accuracy is high, and it is generally used for fine filtration of oil, but it cannot be cleaned after it is blocked, and the filter element must be replaced frequently.

(4) Line-gap oil filter element: The filter element is composed of steel wire or aluminum wire tightly wound on the outside of the cylindrical frame, and the impurities mixed in the liquid are filtered out by the tiny gap between the copper wires. Its structure is simple, the flow capacity is large, and the filtration precision is higher than that of the mesh oil filter, but it is not easy to clean, and most of them are oil return filters.

Generally speaking, the filter selection is mainly based on the two main indicators of filtration accuracy and flow rate, and the corresponding filter elements vary according to different filter structures. In the actual purchase of filters and filter elements, consumers should make selective purchases according to different needs.