The Secrets of Suction Filter Element and Return Filter Element

In the realm of hydraulic systems, the suction filter element and return filter element are often misunderstood as identical products. However, they serve distinct functions, each contributing uniquely to system efficiency and longevity. Recognizing these differences can enhance performance and reliability, offering mutual benefits for businesses focused on precision engineering. 

The “loyal guard” of the oil pump - Oil Suction Filter Element                             
The oil suction filter element is installed on the oil suction filter housing and is closely guarded at the oil suction port of the oil pump. As we all know, there are often a lot of large solid impurities in the hydraulic oil. These impurities are like "time bombs" that seriously threaten the safe operation of the hydraulic system and the service life of the hydraulic components. The existence of the oil suction filter is to control it at the "source".


It effectively controls the contamination level of the hydraulic system by preventing the inhalation of common impurities, greatly improving the cleanliness of the system, and thus provides a solid "protective umbrella" for the oil pump and other hydraulic components.

The oil suction filter element itself also has distinct characteristics:

Strong oil flow capacity: It can ensure sufficient supply of liquid, meet the flow requirements of the oil pump, effectively prevent the occurrence of suction, and keep the oil pump in good working condition.

High-efficiency filtration efficiency: It has excellent filtration effect on large-particle solid impurities, always maintains the cleanliness of the oil, and lays the foundation for the stable operation of the hydraulic system.

High-quality glass fiber filter material: The use of glass fiber filter material not only has good filtration effect, but also has a long service life, reducing the cost and trouble of frequent replacement of filter elements.

Coarse filter element properties: Focus on intercepting larger particles of impurities, and play a key initial filtration role in the filtration system of the entire hydraulic system.

The "Guardian Angel" of Fine Parts--Oil Return Filter

The return oil filter element is located in the return oil pipeline or return oil pipeline. It has an important mission - to filter and remove the pollutants generated or invaded in the system before they return to the oil tank. This is of great significance for protecting the oil pump and various hydraulic components, especially fine parts such as gear pumps and plunger pumps.

The return oil filter also has its own unique features:
Fine filtration accuracy: Its filtration accuracy is usually between 10-30um, which can accurately capture those fine pollutants, ensure that the oil returned to the oil tank is purer, and provide clean "blood" for the circulation of the entire hydraulic system.
Specific installation position: Installed on the hydraulic return oil pipeline, that is, at the rear end of the oil pump outlet, when the oil completes the working cycle and is about to return to the oil tank, the final "purification check" is performed.
Fine filter positioning: With its fine filtering ability, it belongs to the category of fine filter elements and plays an irreplaceable role in ensuring the normal operation of precision components in hydraulic systems. 

When choosing the right filtering equipment, the selection of filter element is undoubtedly a crucial link. Only by deeply understanding the differences and characteristics of the oil suction filter element and the oil return filter element, and accurately selecting according to actual needs, can the hydraulic system operate efficiently, stably and safely, providing strong support for our production and life.

If you are interested in Boweyfilter products, please contact us here.

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