Browse Learn C1206

Filtration and Contamination Control for Aerospace Hydraulic Systems C1206

This four-hour short course provides an introduction to contamination control principles in aircraft hydraulic systems. Topics covered include an introduction to the types of contamination in aircraft hydraulic systems, contaminant measurement, and reporting methods. In addition, the impact of contamination on hydraulic components is discussed in detail. Along with an introduction to filtration mechanisms, information on testing, rating, and specifying filters will be provided.

Learning Objectives
By attending this seminar, you will be able to:
  • Associate the types of contaminant in aircraft hydraulic systems and the problems that uncontrolled contamination can cause
  • Interpret a particle count or contamination level report
  • Identify how filters work and are evaluated
  • Explain filter ratings
  • Formulate a basic specification for hydraulic filters

Who Should Attend
The course is intended for engineers with some basic knowledge of hydraulic systems, but with minimal experience with the impact of contamination and specifications of filtration products for controlling it.

A basic knowledge of hydraulic systems will be beneficial.
  • Contamination fundamentals
    • What is particulate contamination and what are its sources
    • How are contamination levels measured
    • Reporting contamination levels in aerospace hydraulic systems
    • Measuring and reporting water contamination
  • Contamination damage
    • Types of wear that occur in hydraulic components: Abrasive; Erosive; Fatigue; Adhesive; Corrosive
    • Critical clearances and wear in hydraulic components
    • Benefits of controlling particulate contamination
    • Benefits of controlling water contamination
  • Filtration fundamentals
    • Types of filters
    • Filter construction
    • Mechanisms of filtration (how they work)
    • Water removal principles
  • Filter efficiency testing and rating basics
    • Nominal rating
    • Absolute rating
    • Gravimetric efficiency
    • Filtration (Beta) ratio [Multi-pass test]
    • Cyclic flow Multi-pass test (Stabilized cleanliness rating)
  • Other types of filter tests
  • Writing a comprehensive filter specification
Leonard E. Bensch

Dr. Leonard Bensch has been involved in the field of filtration and contamination control since 1973. Dr. Bensch joined Pall Corporation in 1979 as Senior Staff Scientist in the scientific and laboratory services (SLS) Department. He held various management roles including SLS and Strategic Marketing for the Pall Aeropower group. He became President of Pall Industrial Hydraulics, and then in 1988, he became Pall Corporation Vice President in charge of Western Hemisphere fluid power operations. Dr. Bensch has authored over 130 technical papers in the area of filtration and contamination control. He is an active participant on several industrial technical committees, including SAE International and the National Fluid Power Association (NFPA). He is the Chairman of the USA Technical Advisory Group to ISO for contamination control and convener of the ISO filtration test methods working group. He serves as a US expert to ISO for aerospace filtration and contamination control and is the past Chairman of the Board of Directors of the National Fluid Power Association. Dr. Bensch received BS, MS, and PhD degrees in mechanical engineering from Oklahoma State University where he conducted and led research projects for 12 years in component wear, filtration and contamination control, and was instrumental in the development of most modern industrial hydraulic filter test methods and contamination analysis techniques.

Hotel & Travel Information

Fees: $425.00
SAE Members: $340.00 - $383.00

.4 CEUs
You must complete all course contact hours and successfully pass the learning assessment to obtain CEUs.

For additional information, contact SAE Customer Service 1-877-606-7323 (724-776-4970 outside the U.S. and Canada) or at

Duration: .5 Day
Upcoming open enrollment dates being scheduled. Please check back.