Do You Know The Classification Of HEPA Filters?

The HEPA Filter is the heart of the bio-safety cabinet. The HEPA filter is a dry, high efficiency air filter that can be processed from laminated borosilicate microfibers like paper.

The filter in the hydraulic system is called the oil filter.

HEPA Filter

The hydraulic oil often contains particulate impurities, which will cause the wear of the hydraulic components relative to the moving surface, the slippage of the spool, and the blockage of the orifice, which greatly reduces the reliability of the system. The installation of a certain precision oil filter in the system is guaranteed according to the material and structure of the filter element. The oil filter can be divided into mesh type, line gap type, paper filter type and magnetic oil filter. According to the position where the oil filter is placed, it can also be divided into a suction filter, a pressure filter and a return oil filter. Considering the self-priming performance of the pump, the oil suction filter is mostly a coarse filter.

The following points are shared by professional Home Air Purifier HEPA Filter Factory:

(1) Mesh oil filter

The net type oil filter has a filter mesh with a copper mesh as a filter material, and it is surrounded by a plastic or metal tubular skeleton with a plurality of holes around it, and it is coated with one or two layers of copper mesh, and the filtering precision depends on the number of layers of the copper mesh. The oil filter has the advantages of simple structure, large flow capacity, convenient cleaning, but low filtration precision, and it is generally used for the oil suction port of the hydraulic pump.

(2) Line gap type oil filter

The line gap type oil filter is formed by tightly winding a steel wire or an aluminum wire around the cylindrical frame to form a filter element, and the small gap between the copper wires is used to filter out impurities mixed in the liquid. The utility model has the advantages of simple structure, large flow capacity, high filtration precision than the net type oil filter, but it is not easy to clean.

(3) Paper oil filter

The paper oil filter has a paper core made of plain or corrugated phenolic resin or wood pulp microporous filter paper, and the paper core is wrapped around a skeleton made of perforated tinplate to increase the strength. In order to increase the filtration area, the paper core is generally formed into a folded shape. The filter has high precision and is generally used for fine filtration of oil, but it cannot be cleaned after clogging, and the filter element must be replaced frequently.

(4) Sintered oil filter

In the sintered oil filter, the filter element is sintered by metal powder, and the micropores between the particles are used to block the passage of impurities in the oil. The filter element can withstand high pressure, good corrosion resistance and high filtration precision, and it is suitable for high pressure and high temperature hydraulic systems requiring fine filtration. The necessary means for the hydraulic system to work properly.

The oil filter has four kinds of coarse filter, ordinary filter, precision filter and special fine filter according to the filtering precision, and they can filter out more than 100 μm, 10 to 100 μm, 5 respectively. Impurities of ~10 μm and 1-5 μm in size.

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