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Fluid Power Academy

(203051) A Practical Guide to Filtration in Hydraulic Systems

(203051) A Practical Guide to Filtration in Hydraulic Systems

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AUTHOR:  Rory S. McLaren

Format: Printed version *8-1/2" x 11". PDF Non-printable (1.9mb). 44 pages.


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The purpose of this manual is to teach the reader about the ultimate objective of hydraulic system oil filtration which is to clean the hydraulic fluid to a point that contamination is not the factor in the catastrophic, degradation, or intermittent failure of any component in the system during the desired useful life of that system.

Topics included in this vitally important manual include:

  1. What is a system approach to contamination control?
  2. What effect does contamination have on the life and operation of hydraulic components?
  3. What is the purpose of hydraulic fluid?
  4. What are the mechanical clearances in hydraulic components?
  5. What is the size of a micron?
  6. Where does contamination come from?
  7. What are the different types of failures?
  8. Do manufacturers make recommendations regarding fluid cleanliness?
  9. Who is ISO?
  10. What is an ISO Range Code cleanliness chart?
  11. How do I go about setting a target cleanliness level?
  12. How do I go about selecting an ISO range code for my machine?
  13. Now that I have the range code number, how do I go about selecting the right filter?
  14. What are typical filter ratings?
  15. What is Beta-Ratio?
  16. Where in the system should I locate the filter?
  17. How do I know if the filter is doing its job?
  18. When do I change the filter?
  19. How can I increase element service life?
  20. Monitoring system cleanliness.
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