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Safety, operation and maintenance of water jet tail cutter

Beloit's original Water Jet Tail Clip was a hardworking tail cutter and its operation, maintenance and safety considerations are reviewed in this article.

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.

Web shifting - base paper, misalignment, free span and process

Web shifting can be caused by the paper or by something mechanically wrong in the web path. This article presents typical causes of sheet shifting. Most have to do with alignments, but base paper, drying and coating also have great impact.

Improving reel turnups for low downtime and high paper yield

The reel turnup process must be perfect in order to maintain high quality end product and avoid downtime. Successful turnups share key aspects, while others may benefit from a technology upgrade.

Reducing coater variability with a coater beam replacement

Many existing coating station blade beams experience MD and CD coat weight variability due to a variety of factors. Replacing the blade beam with a Valmet OptiCoat beam reduces variability and improves end product quality.

Achieving boiler MACT (Maximum Achievable Control Technology)

The primary goal of a boiler tune-up is to improve efficiency with respect to combustion operations by re-establishing the air-fuel mixture for the operating range of the boiler and balance oxygen and unburned fuel.

Niploading of SymSizers - problems, corrections and maintenance

Nip loading varies based on the type of size / coating applied, the roll crowns and the incoming sheet. Wrinkles, skewing and e-nip profiles are important.

Hydraulic controls improve performance, reliability - case study

In this case study, Valmet helped a northern USA mill upgrade its hydraulic controls to remove obsolescence, while also improving runnability and reliability.

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.

Coater backing roll showers - purpose, layout and setup

Showers on the coater backing roll lubricate, cool and prevent coating buildup. This extends roll lifetime and can reduce coater-related sheet breaks.