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Three things about refining

Read three highlights of Valmet´s refining technology and learn how we can help you to improve performance and increase efficiency across all refining applications.

Avoiding roll defects at the winder - causes and solutions

Most roll structural defects are caused by poor nip or tension. These tips will help operators avoid starring, soft starts, corrugations and crepe wrinkles.

Avoid the wrinkles and web breaks that result from poor splicing

Splicing offers little reward for a job well done, but big penalties to the bottom line for poor quality workmanship such as when customers return shipments.

Improved drying - Reduce thermal resistance with spoiler bars

Spoiler bars increase drying capacity up to 30%, with improved drying uniformity and CD moisture profile control. A kraft bag case study demonstrates.

Optimize doctoring performance and lower total cost of ownership

Every doctoring process can be improved. The usual investments required are minimal. Optimizing your doctoring processes results in better runnability, improved quality, optimal production efficiency, reduced maintenance costs and improved safety and environmental effect.

Stop waste due to cockle wrinkles - avoid contributing factors

Cockle wrinkles, common on light weight paper machines, cause waste paper and rejected rolls resulting from downstream sheet breaks. They are influenced by basis weight variation and high drying temperatures.

Make slitter adjustments safely, provide better paper quality

Operators must check and adjust slitters in a safe manner regularly for slitter positioning systems to perform well, including gap, sideload, overlap and angle.

Optimizing continuous digester performance (webinar)

Many continuous digesters are operating over design, making the system too sensitive to process disturbances. A Valmet webinar reviewed issues and solutions.

Troubleshooting chronic wrinkling on a size press, case study

Valmet investigated an issue where a size press was having wrinkling when the nip closed and before the applicator beam was loaded. The culprit was hydraulic.

Importance and limits of hardness in wound roll quality

Building a good roll requires controlling hardness. Hardness is dependent on paper characteristics and the tension distribution throughout the wound roll.