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Troubleshooting doctors: loading, wear and roll surface marking

Some doctor problems are rather straight forward, readily recognized, and corrected. However, occasionally one will crop up that seemingly has no solution.

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.

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.

SAFETY BULLETIN: Precautions to take before refiner maintenance

Valmet has learned of a catastrophic failure of a Valmet Disk Refiner. Excess pressure was used trying to unplug an inlet pipe. No injuries, but much damage.

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.

SymSizer/OptiSizer beam setup, after applicator roll change

SymSizer or OptiSizer beam setup is required after every applicator roll change or whenever you feel there is an issue with starch/coating application. The goal is to set the applicator beam parallel with the new applicator roll.

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.

Finding the sweet spot for the polymer dose

In order to improve effectiveness, the Mitchells Plain Wastewater Treatment Works operated by the City of Cape Town, South Africa, installed two Valmet Total Solids Measurements (Valmet TS) in the sludge cake pipelines to provide immediate inline feedback on the dry solids percentage of the sludge cake.

Valmet Clothing Days: Towards more sustainable papermaking

Valmet’s traditional Clothing Days were organized in Tampere, Finland, for the 15th time in October 2022. In addition to a full-day seminar with interesting presentations on paper machine clothing trends and customer success stories, the participants had the chance to mingle in social events and visit Fabrics’ local production facility.

Shaping the industrial world virtually

Virtual technology and applications familiar to computer gamers are beginning to make their mark in the industrial world. Mika Karaila from Valmet highlights the benefits of integrating virtual tools in mill planning and maintenance processes.