DEUBLIN Rotating Unions with ATEX Certifcate According to EU Directive

Many models of the series 54, 55 and 57 - the most common models among DEUBLIN Rotating Unions - are now available with ATEX certification.

Rotating unions are „devices connecting pressure pipes with rotating pressure equipment" such as rollers through which fluids flow with a certain pressure for heating and cooling purposes.

The ATEX certification resulted from the finding that the term „ignition source" does not necessarily relate to electric machine parts, only, but also to other mechanical machine elements which are not self-driven.

In the environment of such mechanical components, conditions may occur such as an inflammable gas-air mixture in respect of which the surface temperature of the component also presents an „ignition source" while an „electric spark" does not necessarily exist.
Accordingly, the main focus is on defining hazardous components also under the aspects of the Machinery Directive 2009 and indicating limit values beyond which the operation of the component is not admitted.

For this purpose, extensive and time-consuming tests were effected at the DEUBLIN site in Wallau in close cooperation with the German Technical Supervisory Association TÜV in which the compatibility of the respective rotating union models with the ATEX requirements was proven....read more