To ensure reliable identification of the cause of a failure, it is important to identify the logic of the failure through all available information and a systematic analysis of the damage pattern. Therefore, the typical material analysis methods represent only one part of the seminar content. The main focus is on the interpretation of damage patterns which is illustrated by examples of more than one hundred damage cases.

O-Ring Prüflabor Richter GmbH
Kleinbottwarer Str. 1, 71723 Großbottwar
Tel: 07148 166 020 | Fax: 07148 166 02 299
E-Mail: info(at)o-ring-prueflabor.de




The O-Ring Prüflabor Richter specializes in services designed to ensure a safe use of elastomer seals and technical moldings and has been accredited according to DIN EN ISO/IEC 17025 since 2002. In addition to numerous services, we also offer the performance of failure analyses, which we have carried out on more than 2000 cases to date.

Our gained experience is shared in seminars, in-house seminars and consultations. Since the laboratory was founded in 1996, more than 2000 companies have already taken advantage of these services.


After he graduated with a degree in mechanical engineering from the University of Stuttgart, Bernhard Richter was employed by one of the world’s leading sealing manufacturers for more than ten years, seven of which were spent as Head of Applications Engineering of the European O-Ring Division. Soon after, he founded the O-Ring Prüflabor Richter in 1996 and has since passed on his knowledge in seminars throughout the year.

His ability to comprehensively understand complex correlations is particularly appreciated. Furthermore, he is not afraid to provide the user with clear decision criteria. He has been an expert in the ISO Working Group on O-Ring Standardization (ISO 3601) for more than ten years and is well known for his numerous publications.


After studying mechanical engineering at KIT Karlsruhe, Mr. Timo Richter worked several years for a global manufacturer of technical elastomer products. His responsibilities included coordinating the cooperation between central process development, materials development and tool construction with several domestic and foreign production sites. Since January 2018 he has been in the O-Ring Prüflabor Richter.


We also offer individual designed seminars in English according to the needs of our customers.
For more information feel free to contact us at info(at)o-ring-prueflabor.de

Seminar program

Day 1

Introduction 9.30 - 9.45
Sealing with elastomers: important prerequisites
  • Structure of technical elastomers of use
  • Important influencing factors on the sealing process
  • Design requirements
  • Recipe and production-related influences
9.45 - 11.00
Damage mechanisms
  • Integral approach: required information
  • Damage mechanisms, damage characteristics, damage frequency
  • The ten most frequent individual causes of failures
  • Presentation of all-important analytical test methods
11.00 - 12.45
Lunch Break 12.45 - 14.00
Manufacturing defects with examples of damage (T.RICHTER)
  • Typical manufacturing, machining and control processes
  • Limits for shape and surface deviations
  • Possible causes of crack formation and their detection
Coffee Break 15.15 - 15.30
Inadmissible impact of mediums with examples of damage
  • The most common causes
  • Impermissible chemical exposure
  • Examples of incompatibilities
  • Not permitted swelling
  • FFKM elastomers and other materials for corrosive mediums
15.30 - 17.00
Discussions end approx. 17.15
Exchange of experiences in a casual setting 19.00 Uhr


Day 2

Resistance examinations
  • Selection based on technical literature
  • Practical exercises, examples
8.30 - 9.00
Extreme temperatures, aging and ozone with damage examples
  • The most common causes
  • Types of aging, overheating, exposure to rubber poisons and ozone
  • Types of thermal overloading, material-related damage characteristics
  • Loss of plasticizers
  • Undercure
09.00 - 10.15
Coffee Break 10.15 - 10.30
Mechanical / physical impacts with damage examples
  • Seals in main force closure
  • Incorrect installation spaces and installation damage
  • Gap extrusion
  • Explosive decompression and explosive evaporation
  • Abrasion and spiral defects
  • The blow by effect; causes for the „sweating“ of hydraulic seals
  • The diesel effect, consequences of air in hydraulic oil
10.30 - 12.45
Lunch Break 12.45 - 14.00
Practical exercises
  • Handouts of damage patterns
  • Classification of the damage mechanism with the help of the training materials
  • Discussion and evaluation of the results
  • Case studies from the auditorium
14.00 - 15.15
Final Discussion 15.15 - 15.30
End of the seminar approx. 15.30