What type of filter should never be used in a hydraulic system?

In hydraulic systems, the choice of filters is critical to maintaining system performance and preventing damage to components. An adsorbent filter is not suitable for use in hydraulic systems because it is designed to trap substances on its surface, which is not effective for the types of contaminants typically found in hydraulic fluid. Hydraulic systems usually deal with particulate matter and water, which require a different type of filtration to be effectively removed.

Strainers and sieves are designed to capture larger particles and contaminants, functioning well under the flow conditions present in hydraulic systems. They can prevent solid particles from causing wear or failure of pumps, valves, and other components. Absorbent materials, while they can be useful in certain applications, work by soaking up liquids, which is not practical for hydraulic fluids since it can lead to clogging and will not address particulate contamination.

Given these considerations, the use of an adsorbent filter would not provide the necessary filtration needed in hydraulic systems and could compromise their reliability and efficiency.