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Common hydraulic valves - the proportional pressure valve

Proportional valves are commonly used to control pressure to a cylinder or hydraulic motor.

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.

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.

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).

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.

Valmet Online Learning - reduce your mill's knowledge gap

The current workforce is growing older, with many retiring within three to five years. The new workforce lacks fundamental skills and knowledge. Valmet's online training portal is an affordable alternative to bridge that knowledge gap.

Web handling, construction & proper setup of bowed roll spreaders

Bowed spreader rolls are the most commonly used spreader roll and are critical to most web handling processes. Learn how the construction, web orientation, cover material and wrap angles play important parts in web handling.

Proper press maintenance, key operational checks and upgrades

Loading systems are an essential part of the press section. Regular inspection and maintenance are needed on a regular basis to maintain machine high runnability.

Dynamic roll balancing - why, how, measurement and specification

Although a roll is statically balanced, it may have an eccentric center of gravity which cannot be detected by simple static balance. This will become noticeable when the roll speed is increased, and an end-for-end motion occurs. Dynamic unbalance requires investigation to determine which end, or both, require counter-weighting.

On-machine grinding increases speed and quality, a case study

At a fine paper mill, despite every effort, sheet breaks had averaged more than six a day for the last several months. Two of the four dryers were shut down and the two functioning dryers would need to be taken off-line soon if nothing could be done...