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High precision VIB AirTechPlus 6 water moisturization system in Optiload twinline
in Kvarnsveden PM 12

3. INSTALLATION OF KVARNSVEDEN PM 12

Figure 5 shows one of the the two Kvarnsveden PM 12 off-line OptiLoad TwinLine calenders. Both the calenders include the fine spray VIB AirTechPlus 6 system (fig 6). The system is designed for up to 1500 m/min operation. The paper web is supported by guide rolls in spraying areas to ensure both good runnability of the calender as well as low CD moisture variation.

Kvarnsveden PM 12 OptiLoad TwinLine calender
Figure 5. Kvarnsveden PM 12 OptiLoad TwinLine calender

Typical water amount used in the system is 2-4 gsm water flow of the first spray and 2-3 gsm flow of the second spray. The actual amounts are controlled based on moisture scanner measurements in front of first nip and after the calender.

 VIB AirTechPlus 6 spraydampener
Figure 6. VIB AirTechPlus 6 spraydampener

4. VIB AirTechPlus 6 SPRAY PERFORMANCE IN KVARNSVEDEN PM 12

To verify the work done on pilot facilities a test was performed in the Kvarnsveden PM 12 calenders. The system was run with equal water flows as tested with pilot machines. In the first case, manual controls where each nozzle has the same set point was used. In the other mode, moisture controls were used. Thus, CD and MD set points were calculated based on measured on-line moisture values.


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VIB Systems GmbH • Am Kreuzstein 80 • 63477 Maintal • Germany • Phone: +49 6109 606-0 • Fax: +49 6109 606-160

VIB Systems, Inc. • 4661-A Hammermill Road • Tucker, GA 30084 • USA • Phone: +1 770 491 8981 • Fax: +1 770 934 5716

Qualitek VIB • 4661-A Hammermill Road • Tucker, GA 30084 • USA • Phone: +1 770 543 0180 • Fax: +1 770 543 0181