Filters must be integral parts of hydraulic systems to ensure the proper operation of the system’s pumps, valves, and actuators. As the hydraulic systems’ requirements are demanding, the prescribed cleanliness levels of their fluid media must be achieved under all operating conditions. For this reason, it is essential to understand the different types of hydraulic filters and their performance ratings.
A book authored by the Author presents the principles of filtration in hydraulic systems. These principles include the materials of filter media, various designs of filters, and the typical filter locations in hydraulic systems. Further, this book describes the filter element performance ratings, such as the beta ratio and efficiency, and the multi-pass test to determine such ratings.
The article explores the topic of hydraulic filters for educational use and is presented here to refresh your memory. Hope you are able to recall the constructional features, performance specifications, and location-based installation details of hydraulic filters quickly. Let us get down to the nitty-gritty of hydraulic filters…
Introduction
Modern high-pressure hydraulic systems with components built to closer tolerances are susceptible to many types of contamination. Contaminants can cause the premature wear of internal surfaces. They also promote leakage and clog the flow paths. Therefore, an efficient and correctly-sized filtration system should be an integral part of every hydraulic system to separate the particulate matter of a specified size or greater from the system fluid. They should be fitted at appropriate locations in the hydraulic circuit for the effective control of contamination.
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