Seals and Sealing System Design of Actuation Systems in Military and Commercial Aircraft

This half day seminar presents an overview of seals and sealing system design for military and commercial aircraft. It is aimed to provide engineers having some previous actuator and control valve design background with an understanding of the general hardware groove standards, standard parts for static applications and how seal designs and sealing systems can be best used in dynamic reciprocating and rotary applications. Information will be provided regarding seal material and fluid compatibility, friction drag, expected wear rates depending on operating conditions and duty cycle, hardware surface finish and topography. Also included will be information on seal installation procedures and potential pitfalls to avoid.

What Will You Learn

By attending this seminar, you will be able to:
  • Identify the standards relevant to seals and seal systems
  • Summarize key characteristics of dynamic reciprocating applications
  • Summarize key characteristics of rotary applications
  • Evaluate seal material characteristics and proper applications

Is This Course For You

This seminar is designed for engineers and other key personnel with some actuator and control valve design knowledge.

Materials Provided

This data is not available at this time

Course Requirements

This data is not available at this time


  • First O-Ring Patent
    • 1932-Niels A. Christensen
  • Parker: Development of Range of Sizes
    • Tables
  • AS568
    • Range of sizes
    • Cross sections
    • Tolerances to Class 2- Tables
  • History and Application of Aerospace Gland Dimensional Standards for Seals and Scrapers
    • MIL-P-5514 Revs A and B
    • MIL-P-5514 Revs C, D, and E
    • MIL-G-5514 Rev F
    • AS4716, AS5857, MS33675, AS4088, AS4052
  • History of Backup Ring Standards
    • MIL-R-8791, MS28774, MS27595, MS28782, MS28783
    • AS8791, AS5781, AS5782, AS5860, AS5861
  • EPDM History and Applications
    • NAS1613, NAS1611, NAS1612, AECMA specs
    • prEN 6111, prEN 6075, prEN6076
  • Elastomer Materials and Applications
    • In red oils
    • In fuels
    • In turbine oils
    • Properties
  • Storage of Elastomers
    • ARP5316
  • Plastic Materials and Applications
    • AMS3678 and slash sheets
    • Effects of fillers on PTFE materials
  • High Modulus Plastics
    • PEEK
    • PEKEKK
    • Carbon fiber composites
    • Properties and uses
  • Reciprocating Seals for AS4716 grooves
  • Piston Seals
    • Bi-directional - to fit std. and non-std grooves - examples
    • Uni-directional - to fit std. and non-std grooves - examples
  • Rod Seals
    • Bi-directional - to fit std. and non-std grooves - examples
    • Uni-Directional - to fit std. and non-std grooves - examples
  • Scrapers for MS33675, AS4088, and AS4052
  • Reciprocating Sealing Systems
    • Tandem and tertiary sealing systems with scrapers
  • Face Seals
    • Types for internal and external pressure
  • Seal Design Notes: An Appreciation
    • Low temperature considerations
    • High temperature considerations
    • Friction calculations: C of F for PTFE compounds
    • Friction calculations: Elastomers
    • Consideration of elastomer shear strength
    • Consideration of elastomer tensile strength
    • Consideration of elastomer elongation percentage
    • Thermal cycling: Reciprocating PTFE seal components
  • Rotary shaft seals
    • Metal can types: Elastomeric lip(s)
    • Metal can types: PTFE lip(s)
    • Flanged spring energized seals: Thermal cycling
  • Hardware Surfaces, Coatings, and Roughness Finishes
    • Dynamic
    • Static
  • Installation Tools and Procedures
    • For piston seals
    • For rod seals
  • Hardware Design Tips: Avoiding Installation and Performance Catastrophes
  • Pump/Motor Function Applications