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Fabric guiding - basic rules, guidelines and setup procedures

Guiding of all types of fabrics follows similar basic rules, guidelines, and setup procedures. Here are some of the most important ones…

Steam and condensate system performance - explanation and tips

The purpose of a paper machine steam and condensate system is to control steam pressures for optimum drying, provide stable control over the entire operating range and efficiently remove condensate from inside the dryers. This article presents tips for maintaining performance with your S&C systems.

Example hydraulic maintenance schedule - daily, weekly, annual

The need for hydraulic preventive maintenance is determined over time by component operating conditions. The schedules in this article are intended as guidelines.

Uhle boxes - care, handling, cleaning, maintenance and adjustment

Reliable operation of a press section uhle box requires attention to care and handling, as well as routine maintenance. Blades and covers are susceptible to costly damage if improperly handled and maintained.

Steam & condensate 1 - overview, glossary and water evaporation

In this first in a two part series, We explain the terminology and working principles of a typical S&C system and how it controls steam pressure for optimum drying over the entire operating range.

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.

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.

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.

Valmet Recovery Boiler Cleaning - simple, efficient and safe

Valmet's recovery boiler floor washing service, Valmet Recovery Boiler Cleaning, washes the floor along with the rest of the boiler using low pressure water sprays and mixing devices. This decreases mechanical cleaning and reduces floor tube damage.