For many years, the CK rotating unions have been well-known as real “workhorse” for conveyance of heat transfer oil in the paper industry – in particular in the hot and high vibration work environment of calenders.
Regarding the fact that machine speed and pressure will continue to rise in future, DEUBLIN engineers started to redesign and upgrade the CK some time ago.
Accordingly, all bearing parts were adapted not only to operate at the familiar temperatures of 230°C, but also with pressures up to 6 bar and speed up to 1,000 revolutions per minute (relating to 4″ model).
In this enhancement the subject of lubrication/relubrication was also taken into account so that the models of the new CK series now feature almost maintenance-free operation.
It is now by design, that the new bearings are lubricated by the media and do not need relubrication using high-temperature bearing grease. This feature of the new CK is also called “life-time lubrication” and is an additional benefit which provides for early pay-off of the new CK and has a positive effect on the total cost of ownership (TCO).
The new CK is available with inner diameters ranging from 4″ to 7″ and still does not need any external cooling system.
The new CK series has been installed in numerous calenders across Europe, Asia and America, and it has proven to be a successful solution for every installed application.
When considering the TCO and not the product “rotating union” itself, the supplementary services rendered by a renown supplier such as DEUBLIN become the focus of attention.
In this respect, it can be noticed that the entire drying section of a paper machine often features a great potential for performance increase and/or cost reduction.
For this purpose, DEUBLIN examines this machine segment and develops an optimization concept for the steam and condensation system including rotating unions, suitable siphon systems, and turbulence bars which considerably improve the heat transfer.
This consulting service provides several benefits: The paper machines are fit for the future and the energy input is reduced which immediately results in lower costs and reduced CO2 emissions.
Experience gained in this respect and information on many other relevant aspects of the paper machine can be exchanged again at the “Paper Drying Seminar” from 27th to 29th April 2010 in Hofheim-Wallau, presented by DEUBLIN Germany. To attend the seminar please contact: phone +49 6122 8002-800, fax +49 6122 8002-805.