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Winding principles part 3 - drum torque control methods, summary

When web tension and drum nip pressure are constant, drum torque will assure uniform or diminishing roll hardness from the core toward the outside of the rolls.

Speed increase creates suction roll bearing vibration, case study

Analysis of unusually high vibration levels from a suction roll back internal bearing pointed to a recent speed increase. Lubricant and a transducer helped.

Mill finds good housekeeping can reduce vibration, case study

PM5 was producing waves of vibration that speed limited the machine, reducing production by 10%. Vibration analysis pointed to the gearbox pinion shafts.

Coater pivot frame hysteresis analysis can solve binding problems

Most blade coater beams are fastened to pivot frames which move the head into position when the coater is loaded. In the case of rigid support profile bar coaters, if the pivot frame binds, coat weight control suffers. A hysteresis test may be needed.

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.

Valmet Field Services strive to earn your trust every day

Valmet's Field Service professionals are on a mission to earn your trust. Assisting you in moving your performance and reliability forward on a shared journey requires expertise, safety consciousness and trust.

Setting out on a new path with Valmet’s Advantage™ ViscoNip® press rebuild

The road to lower tissue production carbon emissions is not always direct. But various rebuild opportunities offer ways to find improvements. The Valmet Advantage™ ViscoNip® press is a trusted solution with 100 pieces sold. Hear tissue makers around the world share their experiences with the Valmet Advantage™ ViscoNip® press!

How a rebuild can make a difference - Sofidel case

The Advantage™ ViscoNip® press and ReDry™ rebuilds at Sofidel’s tissue mills demonstrate benefits related to improved product quality, increased flexibility and machine runnability. In line with their multi-option strategy for reducing environmental footprint they also contribute to lower energy consumption.

Scaling up for the future

APP is investing in a huge new paper manufacturing complex with the world’s highest production capacity, in Rudong, China. The mill aims to realize the benefits of scale by taking advantage of digitalization, future-oriented design and energy-efficient technology.

Valmet changes the game in tissue

Valmet now offers the market’s widest portfolio for the entire tissue value chain, combining cutting edge technologies, services and a dynamic, technology-driven approach to tissue converting, packaging and folding equipment.