Operation Manual
Page
5
Of
10
EK2 Elastomer Coupling series 20 to 800
Created
2019-12-19
Version
2021-08-13
Rotating drive elements are hazard potentials and can cause serious injury when touching or feeding
body parts or clothing. They shall be provided with an appropriate cover which corresponds at least
to class IP2X or comparable national standards. It is the responsibility of the user to use appropriate
cover. The cover shall have a radial distance from the main/outer diameter of the coupling of at least
20 mm and ensure adequate ventilation.
The coupling protection must be carried out in accordance with the material requirements of
DIN EN ISO 60079-0 and must be included in the potential equalisation of the entire system.
Components that are not included in the potential equalisation can charge electrostatically and lead
to an explosion when discharged. Before commissioning, the devices to be connected, the shafts of
which are connected by the coupling, and the coupling protection must be included in the potential
equalisation in such a way that no dangerous charge can be built up on the coupling.
Deposits:
The operator must ensure that no dust accumulates in a dangerous amount between the EK2
elastomer
coupling and the coupling protection. The coupling must not run in a dust filling.
Dust can cause improper heating due to friction on the rotating coupling and thus cause an
explosion. The coupling must not be operated in a dust filling. Clean regularly depending on the
application.
Depending on the ambient temperatures, including the shaft end temperatures to be connected, the
coupling can become warm up to 135°C. A contact of the hot coupling by the operator must be
prevented by the coupling protection to be installed by the installer.
The torque transmission of the coupling leads to a hot surface, which can cause severe burns when
touched. A coupling protection, installed by the installer, restricts the possibility of touching.
Openings in the coupling protection should ensure a possible heat dissipation of the coupling to the
outside.
Missing cooling openings in the coupling protection can lead to unacceptably high ambient
temperatures of the coupling and thus to the explosion. Pay attention to adequate ventilation of the
coupling.
The elastomer coupling is suitable for indoor and outdoor installation.
The couplings are delivered unpainted. If the user-painted couplings are used in potentially explosive
areas, the requirements for the conductivity of the coating or the limitation of the layer thickness of the
applied paintwork in potentially explosive areas must be observed.
Painted surfaces can be electrostatically charged and become an effective source of ignition,
triggering an explosion. The specifications for electrostatics must be observed by the operator. The
elastomer couplings must not be painted inadmissible.
The couplings may only be used if their materials are resistant to mechanical and/or chemical influences
or corrosion in such a way that the explosion protection is not lifted.
Mechanical or corrosion-related damage can cause an explosion. Note that the materials used match
the conditions at the site, so that the explosion protection is not lifted.
Foreseeable improper use:
The elastomer coupling is
NOT
suitable for the following applications:
•
Use in Gas Zone 0
•
Use in Dust Zone 20
