Up and Running articles
Up and Running articles
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Field Report - Reel process audits
Reel equipment can take a beating during normal operation. Periodic inspections of the reel equipment are recommended to develop a baseline with regard to its process variables and mechanical condition.
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Field Report - Retention aid induced press failure, a case study
Papermaking is as much a chemical process as it is a mechanical one. A fine paper machine lost retention aid flow when the pump shut down. The resulting imbalance caused a press wreck when the pump was restarted. Multiple lessons were learned.
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Field Report - Size press edge wipe setup
Improper setup of a size press edge wipe when running starch results in poor doctoring results outside the sheet path. The extension of the wipe past the holder is a critical part of the edge wipe setup.
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Field Report - Measuring applied and residual coat weight on applicator rolls
Starch and coating is applied to the applicator roll using a rotating rod. The amount of coating applied to the roll is the most important variable for good coat weight control. This article describes a method of measuring the wet film on the fly across the size press, using a simple measurement tool.
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Field Report - Saturated steam table & tips
At the end of this article is a typical enthalpy table for saturated steam. You can use this type of chart to determine what the temperature is inside a dryer can at a given pressure. We also provide some tips for sizing lines, measuring temperature and monitoring condensate pressure.
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Field Report - Dryer steam and condensate system 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.
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Valmet Tissue Technology Webinar - learn from the technology leader
Valmet's free webinar is an information packed hour of presentations and Q&A that will bring you up to date on the latest in tissue making technology, from the headbox to the rereeler, including automation that assists operators in making the best decisions.
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Field Report - Controlling coater blade beam deflection
Coater beams deflect due to coating temperatures, paper temperatures and the temperature of the environment. Newer and wider coating machines are equipped with beam heating/cooling chambers that can be controlled to maintain a straight beam and hence better coat weight profiles.
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Field Report - Yankee rebuild improves tissue quality, a case study
Rebuilding a Yankee is a daunting decision, due to OSHA regulations for confined space entry and the significant cost of downtime. This mill was losing product due to poor tissue quality, and Valmet's service engineers assisted in the decision making process to rebuild the Yankee.
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Field Report - Roll grinding procedures
Successful roll grinding depends on many factors. The knowledge and experience of an operator, the condition of the roll grinding equipment, and continued preventive maintenance of equipment, all contribute to the ability to meet dimensional tolerances and surface finish requirements.