S Specifications and Spare Parts Series DX / DXS
5
.
Limit values
for the friction torque at the rotary joint
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© 2011 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 Maier.
S-DX_en – Version 12 –05.07.2011
S
5.
Limit values for the friction torque at the rotary joint
Maier series DX / DXS rotary joints are equipped with contacting seals and rolling bearings. The
table below lists the friction torque depending on the nominal width DN generated during
rotation at maximum operating pressure and speed of rotation to allow for torque monitoring
recommended for safety reasons.
The following applies to the individual columns:
Column
Normal
:
The friction torque to be expected during normal operation.
Column
Warning
:
If these values are exceeded, the rotary joint and the installation
should be checked within the next 3 days.
Column
Stop
:
If these values are exceeded,
stop
the rotary joint
immediately
for safety reasons; check and repair it, if necessary!
Friction torque for Maier rotary joints series DX / DXS
at maximum pressure PN
(Observe the information provided below)
DN
Normal
in Nm
WARNING
in Nm
STOP
in Nm
10 - 25
3
6
9
32 - 40
7
14 21
50 11 22
33
65 15 30
45
80 20 40
60
100 32
64
96
125 50 100
150
150 80 160
240
Further torques may be generated during operation of the rotary joint in addition to the friction
torques listed. These additional torques may be caused by tilting as a result of horizontal
housing connection pieces, shut-off valves mounted directly to the housing connection piece or
by righting forces generated by the metal hoses for the supply of the fluid. If the roller with the
connected rotary joint is to move during running, the hoses may also cause additional loads as
a result of righting forces of the hoses.
All these additional loads which cause an additional torque must be considered in defining the
switching point for the pre-alarm and the main alarm.
