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Vibration analysis - introduction to techniques and equipment

This article provides a clear, effective and illustrated introduction to vibration analysis techniques, including principles, equipment and spectral analysis.

Start with an audit - common reeling problems and their solutions

Valmet offers reel audits and assessments to help fully understand all aspects of a reeling problem. Discussed here are some common items found when Valmet assesses reel operational challenges.

ITC Bhadrachalam mill - Boosting performance with major upgrades

Systematic development has made ITC’s Bhadrachalam mill a benchmark in India. Close cooperation with Valmet in planning, design, and execution has enabled seamless upgrades, reliable performance, and continuous improvement.

Valmet Refiner Segments - there is always a higher level

Are there limits to refiner segment technology? We optimize processes and stabilize them at the highest attainable and sustainable level. Some engineers might feel satisfied at this point, but at Valmet we don’t.

ServoNavitas - your toolbox for refiner segment technology

Refining is the key process when producing both mechanical pulp and fiberboard. Valmet continuously develops refiner segment technology to improve customer competitiveness. As a result of this development we present a new unidirectional segment concept called ServoNavitas.

Troubleshooting roll defects - causes and corrective actions

Wound roll defects are described and possible causes and associated corrective actions are presented for each defect.

Inspecting dryer cans - guide and recommended procedures

This article covers recommended types of dryer inspection and frequency. An inspection program is necessary to detect early signs of dryer component failure.

Attenuators - operation, maintenance and troubleshooting

A pulsation attenuator, inserted in the stock approach piping, acts as a buffer for the headbox against pulsations developed by stock system components.

Vibration analysis - commonly used terms and definitions

This article provides definitions of terms that appear in a vibration analysis reports and may need further explanation. Graphics illustrate some concepts.

Ten step procedure for patch repair of rubber roll covers

The trick is don’t rush the job; take your time and keep the patch area clean. You’ll need a Dremel, heating platen and uncured, un-vulcanized rubber stock.