Filtration guarantees the reliability of a hydraulic installation. Pollution of any origin (External: sand, dust, etc., Internal: metals, plastic, etc.) must be captured effectively by the filtration system set up on the installation.
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Its efficiency largely determines the longevity of a hydraulic system. The efficiency of a filtration system is reflected in the pollution class found when analyzing the oil. Filters are found in several places on the installation: At the suction of the pumps. At pump discharges, at the inlet of certain receivers (servo-valve, etc.)
- On returns
- On the drains
- In parallel on the reservoir (dialysis)
- On the air tank
The characteristics of a filter Pressure tank
The filter (bowl + filter element) must be sized to withstand the working pressure to which it will be subjected in the installation. In the case of a pressure filter, the clogging indicator must be of the differential type.
The resistance of the filter tank element to crushing
If the filter is not equipped with a bypass, in the event of clogging, the element may crash due to the pressure drop it causes. Pressure elements withstand large pressure differences.
Filter tank in Saudi Arabia must be able to pass the flow of the installation, taking into account the area ratios of the cylinders. The pressure drop it causes must below, even when cold; otherwise, it may indicate clogging and open the bypass.
The filter element or “cartridge.”
This is the defining element in a filter.
To be effective, we speak of absolute filtration degree (10μm, 20μm). These elements consist of several layers of filter media superimposed and folded in order to present a large filtration surface while generating the least possible pressure drop in a limited space. The whole is fixed to a metal frame.