Search results

Hydraulic training availability and three oil filtration tips

Changing or adjusting the wrong hydraulic part can cause more issues that what you had before the change. Training is available from Valmet experts.

Sizer service case study – Size press inspection and repair

A size press in a U.S. mill had a history of not closing evenly, causing wrinkles as the nip closed and potentially causing sheet breaks. Valmet came to help…

An introduction to troubleshooting with vibration signatures

The moment an asset is placed in service it is headed towards failure. It is the vibration analyst with tools and techniques, who helps prevent costly downtime.

Common reel problem situations, causes, defects and remedies

Faults or variations in the moisture content or thickness profile, paper filler variations, coating defects, and strong calendering may cause problems on the reel. This article reviews some common reel defects, their symptoms, causes and possible remedies.

Splicing safety, controls, quality and rear splice methods

Basic tips for good splices are presented, as well as an overview of splicing safety and two rear splice methods (under and over).

Two front splicing methods and safety precautions with each

Two efficient winder front splicing methods are presented. Front splicing is more dangerous than rear splicing, i.e. nip hazards. One person should supervise.

Off-machine coater splicing is affected by several parameters

Splicing efficiency on coaters averages about 98%. Variables that affect the splicing process include primary roll speed match, paster roll speed match, paster roll gap, paster roll pressure, paper caliper/hardness profiles, splice tape pattern and tail length.

Steam & condensate 2 - condensate, heat transfer and maintenance

In the second of a two part series, we explain condensate behavior and heat transfer, as well as how syphons are used for condensate removal. We also list the most important maintenance checkpoints for air, steam and condensate systems.

Burning NCGs in recovery boilers makes pulp mills odorless

NCG (non-condensable gases) are composed of mostly sulfur gases and methanol. In large concentrations they can be toxic. NCGs can be collected and disposed of using the recovery boiler in a safe and reliable way.

Understanding coating viscosity, rheograms and rheology problems

Coating rheology is measured with low shear and high shear viscosity instruments. In coating rheology, viscosity is the measure of the resistance of a coating formulation to an imposed flow.