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The mechanism, need for and effect of reel drum grooving

As machine speed increases and sheet porosity decreases grooving of the reel drum becomes necessary in order to avoid sheet wrinkles, sheet breaks and quality defects.

Doctor and press fabric streaking cause scuff marking, case study

A paper machine with a tri-nip press experienced sheet quality problems with scuff marking after an outage. Two factors contributed - center roll doctor setup and felt cleaning. This case study details the analysis and resolution of the issues.

Winding principles part 1 - TNT overview, effect of web tension

This article is the first in a short series which will explain how web tension, rider roll pressure, and drum torque ratio affect roll quality. Illustrations of key components and control principles will be presented. The series starts with an overview and discussion of web tension.

The 1 Mile Rule analogy of MD length profiles and bagginess

The greater the relative length differences are, the more severe the baggy lanes will be. Proper monitoring tools such as iRoll can help eliminate them.

Dryer can warm-up / cooldown guidelines and typical procedure

The purpose of dryer can warm-up/cooldown procedures is to permit uniform expansion or contraction of all components of the dryer system in order to minimize thermal stresses in the equipment.

Shoe press report - users group, onsite service, belts & rebuild

Maintaining your shoe press has a tremendous impact on paper quality and production line runnability. Valmet offers several services to maintain and improve shoe press capabilities, starting with the Shoe Press Users Group Conference scheduled for early 2018.

Valmet Belt Roll Doctor reduces press moisture, a case study

A 1990s uncoated freesheet machine in the United States wanted to decrease their press moisture. They chose the Valmet Belt Roll Doctor to doctor the shoe press belt.

Maximize your training results with flexible training tools

Why do companies with similar technologies achieve different results? Why do people doing the same task perform differently? The difference often lies in knowledge and skills, both of which can be acquired through learning.

Reel primary arm synchronization avoids bottom jumbo reel losses

If you suspect that you are losing excessive paper on the bottoms of your jumbo rolls, the primary arms may be the culprit. Primary arm synchronization is critical for the reel to function properly during turn-up situations.

Maximize baling line efficiency and minimize cost with an audit

A professional baling line audit from Valmet will ensure optimal use of the installed equipment and maximize efficiency while minimizing service costs.