O-Rings / Gland Design / Temperature range

Gland design for o-ring seals

  • examples of applications
  • influence of deformation and cross-section
  • how o-rings work
  • advantage of grooves (positive/non-positive connections
  • general requirements
  • o-ring housings
  • proper squeeze
  • example for calculation
  • comparison with alternative profiles
  • surface roughness
  • leak tightness and how to test it
  • assembly hints
  • acceptable pressure range
  • special gland designs
  • sealing with plastic parts
  • deformation force

    • Calculation exercises

    Temperature range of different Elastomers

  • Behavior of elastomers at low temperatures
  • influence on the sealing ability
  • different low-temperature testing procedures
  • results of low temperature sealing tests on different materials
  • cycling temperatures
  • typical low- and high-temperature limits of different elastomers based on NBR-, HNBR-, EPDM-, FKM and MVQ-polymers
  • influence of compounding

    Compatibility check

  • test-methods and test-criteria
  • available medium-compatibility tables
  • influence of recipe and polymer
  • influence of temperature and concentration
  • examples

    • Long-term behavior of o-ring seals

  • shelf-life
  • influence of temperature
  • ultraviolet radiation and ozone
  • lifetime-curve according to Arrhenius
  • life-time criteria
  • evaluation of long-term tests on NBR- and EPDM O-rings
  • influence of the cross-section
  • further published results of life-time tests
  • how to prevent chemical or physical overstressing

    • Application-oriented information from A to Z

  • wear
  • Ageing
  • thermal coefficient
  • compression set resistance
  • compatibility against hydraulic fluids
  • elastomers for extreme hot water applications
  • permeation coefficients
  • optimizing gas-tightness
  • vacuum applications
  • electric properties
  • reasons of corrosion
  • gough-joule effect
  • swelling behavior
  • floating o-ring seals
  • coatings to reduce friction
  • tensile strength
  • radiation resistance
  • deformation forces
  • influence of deformation speed and temperature
  • plastic compatibility
  • resistance against CIP- and SIP-media