Published Sept 26, 2013 12.27.47 +2 GMT
A PressHusky roll cover equipped with an iRoll online nip pressure measuring system in action on a Yankee dryer.
Metso has launched polyurethane roll covers for tissue machine press and suction press rolls. The new PressHusky and VacuHusky roll covers are designed especially for Yankee press applications widely used in dry crepe tissue production. As an option, a Metso iRoll online nip profile measuring system can be applied with these new roll covers.
New polyurethane material enables enhanced tissue quality and control of dewatering efficiency Some tissue grades are sensitive when it comes to bulkiness and thickness so lower nip pressures are preferred in pressing. Traditionally, this has been a limitation in the use of polyurethane roll covers in Yankee press applications. However, the new polyurethane material of PressHusky and VacuHusky covers offers several hardness alternatives and more options for cover topography, which results in maximized dewatering and the desired tissue quality with high bulkiness and thickness.
PressHusky and VacuHusky covers also provide lowered operating costs due to the reduced need for regrinding. Their low rolling resistance creates energy savings thanks to reduced roll drive power. In addition, solid press rolls with a PressHusky cover can be operated cost-efficiently without internal water cooling.
Online roll profile measurement with intelligent roll Nip profile monitoring and control has been quite a challenge in a nip formed between a roll and a Yankee dryer. Reliable information on nip profile errors or skewness problems can only be gained when measurements are taken at operating speed with the desired steam pressure inside the Yankee dryer. Metso’s iRoll measurement technology can be utilized with these new polyurethane roll covers, providing accurate nip pressure profile data for efficient nip control.
Metso’s pulp, paper and power professionals specialize in processes, machinery, equipment, services, paper machine clothing and filter fabrics. Our offering and experience cover the entire process life cycle including new production lines, rebuilds and services.
As of January 2014, Metso's Pulp, Paper and Power business will serve its customers with an even more focused and competitive approach as an independent, listed company, Valmet Corporation*.
*Pending the approval of the Metso EGM to be held on October 1, 2013, and registration of the demerger.
Metso is a global supplier of technology and services to customers in the process industries, including mining, construction, pulp and paper, power, and oil and gas. Our 30,000 professionals based in over 50 countries contribute to sustainability and deliver profitability to customers worldwide. Metso’s shares are listed on the NASDAQ OMX Helsinki Ltd.
For more information, please contact: Juha Ruotsi, Global Technology Manager, Roll Covers, Services business line, Metso Tel. +358 40 519 4280, juha.ruotsi(at)metso.com
Samppa Ahmaniemi, Director, Roll Covers, Services business line, Metso Tel. +358 400 461 417, samppa.ahmaniemi(at)metso.com