VIB CurlTech

On-line Curl Control

Paper and board mills manufacturing high-quality paper, require a flat and level sheet after the surface treatment. Today, superior grades can be achieved in sheet flatness (zero curl) using the VIB CurlTech and its unique steam application technology. The VIB CurlTech is a single-side steam applicator to control on-line curl in both cross and machine direction. Our advanced technology enables VIB Systems to provide a reliable, high-performance steam actuator with zone spacing down to 75 mm. This, coupled with our durable pneumatic actuators, provides superior benefits for today's papermakers.

Advanced Actuator Control Systems

VIB CurlTech Description
The most important characteristic of a curl control steamshower is its ability to raise moisture level on a steam-treated surface without heating and remoisturizing of the complete sheet. These characteristics improve the sheet's cross-directional flatness and optimize sheet running in converting. Curl and sheet stability can be controlled simultaneously using the VIB CurlTech in the on-line process.

The compromise between process speed, curl and sheet flatness has been eliminated by increasing the velocity of the steam jets onto the web.

The VIB CurlTech has a cross-directional header to make the profiler absolutely drip free. The steam header collects all condensate which might arise from the steam supply and assures that only dry steam reaches the profiling valves.

The profiling zone is fully compartmentalized, supplying high-velocity steam to each cross-direction compartment via a separate, patented pneumatic actuation valve that allows optimum zone definition and precise control. The spring-loaded profile valves assure immediate steam shut-off at sheetbreak. These proprietary control valves assure finest control of even the smallest amounts of steam (moisture) and prevent excessive steam application. The VIB control technology assures sophisticated on-line control with special limits for each different grade. The VIB CurlTech heating system assures that the steam shower is always hot and immediately ready for steam application.

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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