Cutting ring screw connection
DIN EN ISO 8434 | |
---|---|
Area | Screw connections |
title | Metallic tube fittings for fluid power and general application - Part 1: Fittings with 24 ° cone |
Latest edition | 2/2008 |
ISO | 8434 |
DIN 2353 | |
---|---|
Area | Screw connections |
title | Solderless tube fittings with cutting ring - complete fitting and overview |
Latest edition | 01.2013 |
ISO | - |
A cutting ring screw connection is a liquid-tight connection technology for pipes developed for the highest pressures . The also common name Ermeto screw connection refers to the company Ermeto , which developed the screw connections in the 1930s.
(Cutting ring screw connection before tightening (left) and tightened (right); 1: housing, 2: union nut, 3: cutting ring, 4: tube)
use
Cutting ring fittings are standardized in accordance with DIN EN ISO 8434 (parts 1..4) or DIN 2353 and are mainly used in hydraulics . The components of a cutting ring are: union nut , clamping cone and cutting ring. It has a 24 ° sealing cone and the nut has a metric thread . The screw connections are produced in three series - very light (LL - up to approx. 100 bar), light (L - up to approx. 350 bar) and heavy (S - up to approx. 600 bar).
By tightening the union nut, which tapers conically on the inside, the cutting ring is compressed so that the wedge-shaped inner side of the ring cuts into the pipe wall and creates a tight form fit .
history
The history of the cutting ring fitting began in 1929 when the engineer Hans Kreidel received a patent for the first cutting ring fitting he developed. Two years later, in 1931, the production of the Ermeto (derived from the Greek word “hermetos” = closed, tight) began in Zöblitz / Erzgebirge. In the following 14 years until the end of the war in 1945, Ermeto developed into the market leader in pipe fittings for brake systems and hydraulic heavy industry .
literature
- Klaus Hoffmann, Erhard Krenn, Gerhard Stanker: conveyor technology. Seventh edition, Oldenbourg Verlag, Vienna / Munich 2005, ISBN 3-486-63059-8 .
- Hans Jürgen Matthies , Karl Theodor Renius: Introduction to oil hydraulics. 8th edition, Springer Fachmedien, Wiesbaden 2014, ISBN 978-3-658-06714-4 .
- Gerhard Bauer: Oil hydraulics. 11th edition, Springer Fachmedien, Wiesbaden 2014, ISBN 978-3-658-12343-7 .
- Gunther Dette (Ed.): Lexicon of gas technology. 4th edition, Vulkan Verlag, Essen 1996, ISBN 3-8027-2537-9 .
See also
Web links
- Assembly instructions - cutting ring fittings (accessed on May 5, 2017)
- Cutting ring fittings Nickel-plated brass Stainless steel V4A Low pressure: DIN 2353 (accessed on May 5, 2017)
- Parker Ermeto Fastening Technology Handbook (accessed May 5, 2017)