B Operating Instructions for Rotary Joints Series DX/DXS
7
.
Operation
21/27
© 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.
AB-DX_en – Version 08 – 01.03.2011
B
7. Operation
NOTE
1.
Dry-run causes damage to the rotary joint.
The rotary joint must not run dry.
Exception: test run for a maximum of 30 minutes and at very low speed.
2.
Sudden temperature and pressure loads cause damage to the rotary joint.
Maximum temperature change during startup
Δ
T
≤
2 K/min.
3.
Exceeding the permissible application data as per section "Specifications and Spare
Parts" causes damage to the rotary joint. Avoid operating the unit under conditions
involving several maximum values attained at the same time.
7.1 Commissioning
During initial commissioning, minor amounts of drops of leaking fluid may occur dur-
ing the breaking in period of the dynamic seal. The duration of the breaking in period
depends on the speed and the pressure; usually, it is terminated after a few days.
To avoid premature damage to seals in the rotary joint, it is recommended to check
the installed filters for the fluid at more frequent intervals when a new system is
commissioned for the first time. During this period, expect more pollution such as
chips, rust or scales in the piping system. This is particularly true if the system has
not been flushed prior to the initial startup.
7.2 During
operation
Check the following:
Centric arrangement of the rotor with reference to the roller driver
The radial deflection in the rear area of the housing must not exceed the values listed
in the section "Permissible concentricity tolerance
Quality of the fluid in the system
Document the checked data. Refer to the section "Specifications and Spare Parts" for
the required values.
Visible leakage at the relief connection
The operating behavior of the rotating mechanical seal does not change suddenly.
Slowly increasing leakage indicates seal failure. This way you can acquire values
concerning the operating behavior of the rotary joint installed in the system.
