This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Effectiveness of Contaminant Exclusion Devices
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1973 by SAE International in United States
Annotation ability available
The contamination level of the fluid within a hydraulic system is a reflection of not only the particle removal capability of the filter element, but also the contaminant ingression characteristics of the system. Furthermore, the amount of contaminant permitted to enter the fluid past exclusion devices has a direct influence on the filter requirements-separation efficiency and capacity. Thus, without some means of establishing the effectiveness of contaminant exclusion devices, no realistic analysis can be made regarding the contamination level of a hydraulic system.
This paper presents the analytical expressions that can be used to describe rigorously the contamination control of a hydraulic system. The importance of contaminant ingression is dramatically illustrated by realistic test results. The correlation of the theoretical considerations with characteristic field conditions is accomplished using the results of a wiper seal study. The interpretation expounded is unique and has broad implications in the earthmoving industry.
CitationFitch, E., "Effectiveness of Contaminant Exclusion Devices," SAE Technical Paper 730436, 1973, https://doi.org/10.4271/730436.
- Tessmann R. K. Basic Fluid Power Research Program Annual Report No. 4 Stillwater, Oklahoma 1970
- Bensch L. E. Basic Fluid Power Research Program Annual Report No. 5 Stillwater, Oklahoma 1971
- Tessmann R. K. Fitch E. C. “Effect of Environmental Influences Upon Contamination Levels in Lubricating and Hydraulic Systems.” 26th Annual Meeting of American Society of Lubrication Engineers Boston 1971
- Basham D. V. “Determining the Optimum Filtration Level.” American Society of Mechanical Engineers Design Conference New York 1969
- Blaylock J. L. “Hydraulic System Filters: How They Perform in the Field.” SAE Transactions 78 1969 paper 690605
- Recommended Procedure OSU-WS-1 “Method for Verifying the Cycle Life of a Reciprocating Exclusion Device.” Fluid Power Research Center Stillwater, Okla. 1972