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Valmet introduces new press roll PL cover for tissue machines

Valmet has added to its tissue machine offering with the introduction of a new polyurethane roll cover – Valmet Press Roll Cover PL.

The roll cover’s wear-resistant material and adaptive structure are developed to cope with the harsh operating conditions in tissue production. This could lead to a longer lifetime of roll cover and energy savings, according to the company.

“The new Valmet Press Roll Cover PL is a long-lasting polyurethane roll cover especially designed for tissue pressing applications. It complements the existing applications on the market with unique properties that further improve the tissue production line’s efficiency, capacity, and product quality,” says Ulla Kanerva, global technology manager, roll covers and maintenance at Valmet.

Valmet Press Roll Cover PL is available with a wide hardness range together with improved mechanical properties, from 5P&J to 50P&J.

The adaptive roll cover structure of Valmet Press Roll Cover PL helps to achieve uniform nip profiles and bulk savings.

“To limit the energy needed for drying the tissue sheet, we usually concentrate on improving the post-press dryness. It reduces the energy demand on the Yankee dryer, which in turn removes bottlenecks in the dryer’s performance and operating costs,” Ulla Kanerva explains.

Valmet Press Roll Cover PL offers the possibility for high open grooved areas and large void volumes, allowing for maximal nip dewatering and consistent tissue quality. Selecting optimal roll covers and surface topography with a matching press felt can help tissue makers improve dewatering.