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Know the winder danger zones and related safety equipment

Working in the winder area involves risk to operators and maintenance personnel. Although guards and warning lights and horns help to improve safety, workers must always be aware of the risks involved in each section of the winder.

Beyond Circularity: GreenAro seeks to replace fossil feedstocks for aromatic base chemicals

Part of Valmet’s Beyond Circularity program and its ecosystem, the collaborative research project GreenAro explores sustainable production routes from renewable raw materials to aromatics.

Maintain and troubleshoot winder hydraulic parking brakes

Front and rear drum brakes are installed on a winder, typically on the drive side, in order to improve personnel safety. The parking brakes assure the drums are at zero speed while personnel are working in the windup area. This article describes basic operation, maintenance and troubleshooting of the brakes.

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.

Valmet donated a car to Dąbrówka Orphanage in Poland

Valmet’s global social responsibility program consists of several local programs around the world. In the EMEA area, Valmet supports Dąbrówka Orphanage located close to Valmet's office in Jelenia Góra, Poland.

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.

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.

10 tips: Resist headbox corrosion in maintenance & operation

Corrosion can be minimized by adhering to these maintenance and operating procedures.

Release coating for drying cylinders improves quality, case study

Poor dryer cylinder release causes runnability problems, sheet picking and dusting. At their worst, these problems place limits on cylinder temperatures and operating speeds. Sun Paper overcame these challenges with Valmet Dryer Roll Cover DOH onsite coating and improved their paper quality. Valmet Dryer Roll Cover DOH is based on the latest polymer chemistry, modern thermal spraying technology, and long experience.