What is a precision oil filter

What is the precision oil filter? In fact, the precision oil filter is also called the bypass oil filter. It is a unique environmental protection equipment. It is a bypass type structure, which makes full use of the pressure pump to extract part of the oil into the oil filter to carry out precision filtration, remove the water, rust, particle dust and other residues in the oil, and then return it to the oil tank.

Principle of precision oil filter

the oil can be introduced through the oil pump, and can enter the oil filter tank through the stop valve and regulating valve. After filtering through the precision filter element, it can return to the oil tank through the inspection valve. Precision filter elements are made of paper, metal particles, activated carbon and other materials. The shell of the cylinder section is generally made of stainless steel, and the tubular filter elements such as PP melt blown, line fired, folded, titanium filter element and activated carbon filter element are used as filter elements for the internal structure. Different filter elements are selected according to different filter substances and design technologies.

characteristics of precision filter

high filtration efficiency and stable flow

reasonable structure, light weight, small size and small space for convenient installation

multi-level purification treatment, long service life

bypass design, which does not affect the oil passage and is convenient to use

make full use of mechanical transmission, with exquisite mechanism and easy and simple maintenance

selection principle of precision oil filter

nominal diameter of inlet and outlet

the nominal diameter of the inlet and outlet of the oil filter should not be greater than the nominal diameter of the inlet of the matching pump, which is generally the same as the specification of the inlet pipeline.

nominal pressure

determine the pressure level of the oil filter according to the higher pressure that will occur in the filter pipeline.

selection of hole number

mainly considering the particle size of the residue to be blocked, it is determined according to the technical requirements of the material process. Specification and model: the particle size of the screen can be blocked. Check the table "filter screen specification

filter material

generally, the material of the oil filter is the same as that of the connected technical pipeline. For different service conditions, the oil filter made of cast iron, carbon steel, low alloy steel or stainless steel can be considered.

estimation of resistance damage of oil filter

the pressure damage of oil filter for water is 0.52-1.2kpa under the general estimated rated flow rate


Application scope of precision oil filter

precision oil filter is mainly used for precision filtration of oil used in hydraulic devices, and oil filtration of hydraulic devices and hydraulic systems of plastic machinery, rubber machinery and other environmental protection equipment.

precision oil filter can be used for filtering various hydraulic oils, mineral oils, emulsions, phosphates, ethylene glycol, water and other substances. Different combinations of filter elements are required.