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Improve roll asset management, reduce risk, lower costs (webinar)

A Valmet webinar reviewed the roll agreement concept including case studies of mill achievements. The recorded webinar is described here and available to view.

Spreader rolls - principle, problems, solutions and services

Spreaders deal with web instability, using the principles of tension and traction to overcome dishing and interweaving. Valmet spreader roll services ensure spreading efficiency with all-round cost control.

Troubleshooting rope runs - the four most common problem areas

Rope runs can be complex, and a poorly designed run can decrease machine complexity. They should be assessed periodically to find and correct problem areas.

Improving extended nip press (ENP) performance and blanket life

Since 1980 the Extended Nip Press (ENP) has performed well. But there have been improvements since its initial entry in the market. These include prolonging the blanket/belt and felt life and improving sheet properties with oil lubrication showers, belt brushes, belt wipes, loading piston upgrades and geometry optimizations.

Splicing safety, controls, quality and rear splice methods

Basic tips for good splices are presented, as well as an overview of splicing safety and two rear splice methods (under and over).

Supercalender process conditions, variables and grinding

Process variables affecting SC paper production, process conditions affecting supercalender polymer roll life and calender roll grinding recommendations.

Safe and efficient calender roll removal - four methods

These methods of calender roll removal are recommended by Valmet. Other methods may be used, depending on style/size of calender & available lifting equipment.

Larger jumbo rolls increase pressroom breaks, a case study

Larger wound roll sizes dramatically increased press breaks for an LWC mill's customer. Process analysis and Valmet small fixes provided a temporary solution.

On-machine grinding increases speed and quality, a case study

At a fine paper mill, despite every effort, sheet breaks had averaged more than six a day for the last several months. Two of the four dryers were shut down and the two functioning dryers would need to be taken off-line soon if nothing could be done...

Proper coater blade angle measurement, interpretation and setup

Measuring and interpreting coater blade wear angle can avoid problems such as scratching, poor coat weight appearance, wet bleeding and weeping at the blade tip. Correct positioning of the blade on its bevel will optimize sheet smoothness.