Search results

Maintenance and operation of press stretchers and guides

The paper machine has a number of various loop-type fabrics, wires and felts, which must have a specific tension and controlled position in the cross direction of the paper machine (usually in the middle) so that the paper machine operates properly and as designed.

Common ways an OEM partner helps mills achieve their goals

Maintaining a strong relationship with a trusted OEM partner lets producers learn from the industry’s manufacturing legacy and keep operations moving forward.

Reeling parameters - tension, nip load and peripheral force

The three critical parameters which must be controlled to make a well structured parent roll that can handle further processing are determined case-by-case.

Valmet iRoll Portable Press Analysis at Cartiere del Garda

Cartiere del Garda used Valmet iRoll Portable Press Analysis to resolve problems with moisture profiles, felt lifetimes and more.

The mechanics, factors and prevention of size press orange peel

A common problem on film metering size presses is orange peel. Orange peel is caused when the coating film splits away from the coated sheet in the immobilized coating layer at the exit of the size press nip.

Pilot trials - a reliable basis for successful business decisions

Mills use Valmet's Technology Centers for a selection of testing and pilot services which help eliminate risks related to business investments and decisions.

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.

Increasing felt tension overcomes dryer limitation, a case study

This case study involves a paperboard mill suffering from drying limitations. The mill had added spoiler bars but had no room for extra dryer cans. The mill undertook a rebuild to increase felt tension, thus allowing a subsequent machine speedup.