1st Edition

Practical Seal Design

By Leonard J. Martini Copyright 1984

    This compact, on-the-job handbook provides all the practical and theoreticalinformation to design elastomeric O-ring seals for the full range of static,reciprocating, and rotary functions.Complete with fully illustrated, detailed examples to guide you step-bystepthrough virtually every seal design situation, Practical Seal Designprovides thorough coverage of ring seal geometry, material-compoundcapability, material performance, and design methods ... detailed designconsiderations including stretch, swell, shrinkage, and blowout prevention,as well as innovations to extend seal life span and minimize systemhysteresis ... unmatched treatment of piston-cylinder seal and shaft sealdesign ... and clearly elucidated specifications for military, aerospace, andindustrial standards.With quick-access features to facilitate prompt, proper, and effective design,Practical Seal Design is an essential single-source reference for mechanical,manufacturing, industrial, automotive, aeronautical, and ocean engineers.Furthermore, this one-of-a-kind work is an excellent reference text forprofessional seminars on hydrodynamic, pneumatic, and mechanicalengineering systems, and undergraduate mechanical design courses.

    Preface

    Figures, Tables, Charts, and Design Examples

    I ELASOMERIC RING SEALS

    Basic Configuration of Elastomeric Ring Seals

    Geometry and Application

    Size

    Compounds and Materials

    Elastomeric Specifications
    Manufactures and Distributions

    General Design Method

    Design Method

    Specific Design Considerations

    Material Performance of Elastomers

    II SPECIFIC APPLICATIONS OF RING SEALS

    Static and Reciprocating Seal Applications: Clearing Up the Confusion Between the Military and Industrial O-Ring Gland Specifications

    General Areas of Confusion Between Military and Industrial Specifications

    Specific Discrepancies

    Static Steal Applications

    Squeeze

    Stretch

    Backup Rings

    Surface Finish

    Standard Bosses and Fittings

    Face-Seal Glands

    Reciprocating Seals—Pistons and Cylinders

    Design Parameters

    Failure and Causes

    Applied Side Loads and O-Ring Restoring Forces

    Dynamic Friction

    Static Friction

    System Hysteresis

    Design for Absolute Minimum Friction

    Appendix 5A. Total Restoring Forces for Eccentric Pistons

    Rotary Seals—Designs for Rotating Shafts

    Theory

    Practical Design Data

    Appendix 6A. Determination of Relationship Between Percent of Diametral Reduction of O-Ring and Percent Increase in Cross-Sectional Width

    References

    Index

    Biography

    Leonard J. Martini, Series Editor Lynn Faulkner