Christian Maier GmbH & Co. KG
© 2020 by Christian Maier GmbH & Co. KG Maschinenfabrik | This document may not be copied or disclosed to third parties.
All rights, including copyright and property rights, reserved by Christian Maier GmbH & Co. KG.
Operating manual Series DP_en – Part-B-Version 10 – 19.03.2020
2/31
B
Install an additional safety device:
Install a device for monitoring either the torque or the bearing by means of vibration
pickup (e.g. by FAG or SKF) connected to the emergency shutdown system in order to
avoid bearing damage and consequential damage.
Refer to the section "Specifications and Spare Parts" for limit values concerning the ad-
missible friction torques. Section 6.2 provides an example of the anti-rotation device on
the housing.
If the monitoring system is activated, the rotation of the roller should be stopped im-
mediately and the supply of the medium should be interrupted upstream of the metal
hoses.
Center the inner pipe with the roller and the rotary joint. Wobbling and axial tension of
the inner pipe will lead to malfunctions of the rotary joint.
When the rotary joint has a large nominal diameter or a long inner pipe or is operated
at high speeds, it is recommended to separate the inner pipe in the area of the rotor
connection. This facilitates mounting of the rotary joint and, in case of DPR2 rotary
joints, reduces the wear and tear at the bearing bush for the inner pipe.
Operation with water exceeding 70°C:
In order to ensure maximum reliability and service life of the seal in the rotary joint, it is
recommended that the quality, treatment and conditioning of the hot water used in the
rotary joint corresponds to VdTÜV Technical Chemistry Guidelines 1466 (VdTÜV - Merk-
blatt Technische Chemie 1466). The circulating water must have a low salt concentration
and a maximum conductivity of < 100 μS/cm! Saliferous water may cause deposits in the
sealing gap and premature failure of the seal.
For ATEX-certified products (regulations 2014/34/EC)
Check the electrical resistance between the rotary joint and the system. If necessary,
connect them with equipotential bonding strips to create the same potential on both
sides.
Determine the maximum temperature of the system. If necessary, install a safety tem-
perature limiter.
INFORMATION
Refer to section 3.4 for additional information.
Refer to section 3.4 for additional information.
