Qualitek CurlTek

On-line Curl Control

Companies in the converting industry manufacturing high-quality paper, require a flat and level sheet after the surface treatment. Today, superior grades in sheet flatness (zero curl) can be achieved using the CurlTek and its unique steam application technology. The CurlTek is a single side steam applicator to control on-line curl and moisture in both cross and machine direction. Our advanced technology in conjunction with a high-performance steam actuator with zone spacing down to 75 mm provides best curl control. This, coupled with our durable pneumatic actuators, provides superior benefits for the converting industry.

Advanced Actuator Control Systems

Description
The most important characteristic of a curl control steamshower is its ability to raise moisture on steam treated surface without heating and remoisturizing of the complete sheet. This improves the sheet's cross-directional flatness and optimizes sheet running in converting. With the CurlTek in the on-line process, managing curl and sheet stability can be achieved simultaneously.

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

The CurlTek 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.

 Advanced Actuator Control System Layout
Advanced Actuator Control System Layout

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 Qualitek control technology assures sophisticated on-line control with special limits for each different grade. The CurlTek 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