Two-day Seminar

O-ring Seals – Dimensioning, Operational Limits and Applications

About the Seminar

Over a total of two days, our seminar instructor Bernhard Richter will familiarise you with the O-ring sealing element. You will learn how to correctly design O-ring installation spaces and what to pay attention to. In addition You will understand how to assess deviations from the design guidelines.

Furthermore, Bernhard Richter will demonstrate the high and low temperature limits of O-rings as well as realistic service life expectations and provide participants with many important application-related tips.

Upcoming Seminar date: 06 – 07 May 2025
Seminar fee: 1,195 Euro + VAT
Venue: Training centre Elastomer Training Richter, Reinhold-Würth-Straße 5, 74360 Ilsfeld

Your Seminar Instructor

Dipl.-Ing. Bernhard Richter

After studying mechanical engineering at the University of Stuttgart, Bernhard Richter worked for a leading global O-ring manufacturer for over 12 years, the last 7 years of which as head of application technology, before founding the O-Ring Prüflabor Richter in 1996. Since then, he has passed on his knowledge in up to 30 seminars every year. His ability to explain even complex issues in a way that is easy to understand is particularly appreciated. Furthermore, he is not afraid to provide users with clear decision criteria. He has been an expert in the ISO working group for O-ring standardisation (ISO 3601) for more than 10 years and is well known for his numerous publications.


O-Ring Prüflabor Richter GmbH
Kleinbottwarer Str. 1, 71723 Großbottwar
TEL +49 (0) 7148 16602-0
FAX +49 (0) 7148 16602-299

The Seminar Programme

Day 1

Seminar duration on the first day 9.30 a.m. to approx. 5.30 p.m. incl. coffee breaks and lunch break, dinner from 6.00 p.m.
O-rings – Basics and function
  • The history of the O-ring – The invention of the installation space
  • The secret of the robust O-ring function
  • Principles of groove design – Differentiation from the main load connection
  • The practical significance of the O-ring standard ISO 3601
Design of the installation space – Part 1
  • Design guidelines for compression and inside diameter with calculation example, groove width and surface finish
  • Piston, rod and flange sealing
  • Prevention of installation damag
Design of the installation space – Part 2
  • Recommendations for dynamic O-ring applications and alternative seals
  • Influences on gas tightness, permeation behaviour
  • Special grooves: Trapezoidal groove, triangular groove, conical seat seal, screw-in holes and sterile grooves
Low temperature limits of O-rings
  • Description of the freezing behaviour using different test methods
  • Influence of installation space and load
  • Results from functional tests
  • Low temperature limits of the 10 most common materials
Discussion and end of day 1
Dinner and exchange of experiences

Day 2

Seminar duration on the second day 8.30 a.m. to approx. 3.45 p.m. incl. coffee breaks and lunch break
High temperature and service life limits
  • Effects of high temperatures
  • Definition of a permissible permanent temperature
  • Creation and application of a service life line
  • Determination of service life in accordance with DVGW- 5406
  • Performance limits of the most common materials
Permissible storage times
  • Influence of heat, ozone and UV light
  • Studies from long-term testing
  • Recommended storage times according to various standards
Form and surface imperfections of O-rings
  • The origins of ISO 3601-3
  • Definition of the different types of defects
  • Examples and exercises
O-rings in vehicles – Part 1
  • Typical applications in motor vehicles and practical tips
  • NBR, HNBR, ACM, AEM and CR materials
O-rings in vehicles – Part 2
  • ypical applications in motor vehicles and practical tips
  • FKM, FFKM, EPDM, VMQ and FVMQ materials
Discussion and end of the seminar