High precision yankee grinding Tissue machine maintenance Precision is the key to maximum life and performance from your yankee cylinder. Valmet has the staﬀ, facilities, and equipment to do the most precise job of surface grinding yankee dryers. Comprehensive yankee services Fewer sheet breaks and better runnability
Title: 2008 TCI Yankee Dryer Grinding Author: Robert Created Date: 9/30/2008 1:58:44 PM
Advantage™ Yankee performance. OTR measurement of the Yankee dryer surface provides you with the wear profile and surface topography during full production. Knowledge of the wear profile and topography makes it easier to determine whether to profile grind or just polish the surface at the next shutdown. Objective of OTR profiling
Valmet supplies following advanced solutions to restore perfect Yankee surface, ensure optimum performance and extend dryer life: Yankee surface polishing removes build-up and chatter marks On-site Yankee profile grinding restores the surface Thermal coating
Our grinding process allows precision work (+/- 0.1mm in diameter), while getting a good final surface (roughness <0.6 µm). In case of a porous iron, Pikoasur is able to repair these defects by plug in or spot repair. The grinding process is applicable on drying rolls, Vac rolls, Yankees, pope reel or suction cylinders, all on site.
chemical wear. A specialized, encapsulated grinding machine in the Valmet workshop gives a precise and controlled environment for consistent, high-quality application of thermal coatings while preventing environmental pollution. Super-rigid through-going journals the hallmark and backbone of a high-performance Yankee dryer.
OUR YANKEE DRYER RANGE. The innovative portfolios of COTAC and RELEASE AGENT chemistry support the requirements of technically advanced production, provide consistent process data, optimise paper quality and softness while protecting the Yankee cylinder and extending doctor blade life.
Apr 17, 2018· When the yankee dryer is measured hot it is usually during a crown grind or a refurbishing of the papermaking surface. The yankee dryer is heated by saturated steam at a pressure less than the normal operating pressure. Typically, the grinding pressure is
TAPPI Yankee Dryer Safety Committee April 26, 2006 Marriott Hotel Atlanta, GA USA Page 1 of 3 MINUTES of the YANKEE DRYER SAFETY COMMITTEE April 26, 2006 8:11 AM EDT Virtual Reference Grinding by Tend Johnson Yankees for High Line Loads by Clive Butler Recent Yankee Incidents in Europe by Magnus Hogman
A Yankee dryer is a pressure vessel used in the production of machine glazed (MG) and tissue paper. On the Yankee dryer, the paper goes from approximately 42–45% dryness to just over 89% dryness. In industry, MG cylinders or Yankee dryers are primarily used to remove excess moisture from pulp that is about to be converted into paper. The Yankee cylinder can be equipped with a doctor blade and sprayed with adhesivesto make the paper stick. Creping is done by the Yankee's doctor blade that is scraping th