Trend towards lower basis weights, higher speeds, lower-grade raw material, closed production cycles, and demands for further improvements in printability place special demands on press section configurations. Valmet’s press section solutions are designed to ensure the consistent levels of efficiency required for high quality and runnability.
Discover Valmet press section solutions
Get to know our press section product family OptiPress press sections. Click on the link below to read and find out more of our press section solutions.
The task of the paper machine press section is to remove water, primarily through wet pressing. Wet pressing increases sheet dryness in order to ensure adequate paper machine drying capacity and to improve web runnability at the beginning of the dryer section. The press section also has a major impact on sheet surface properties such as roughness and absorption, and indirectly also on bulk.
Shoe press for improved runnability and capacity increase
Shoe press technology has been used successfully in board and paper production for many years. Valmet’s SymBelt shoe press significantly improves quality and adds dewatering capacity in the press section with fewer press nips. The resulting high dryness gives high wet web strength, which is important in minimizing breaks in the open draw to the dryer section.
Wet end pilot trials
We offer the opportunity to experiment and develop paper and board products and processes at Valmet Paper Technology Center without having to put your own production on hold. This is very cost-efficient compared to expensive tests in your own production. You can follow the activities in the trials on site or remotely through live streaming cameras.
Valmet Paper Technology Center provides the world's most comprehensive offering of testing and piloting services to paper and board manufacturers worldwide. Our pilot facilities have the entire process covered, from stock preparation to coatings and everything between, providing customers with excellent service and reliable results to support investment decisions.
OptiPress Linear, a double-nip press section with shoe press and a linear web run, is an ideal solution to fulfill papermakers’ requirements for effective wet pressing. Runnability bottlenecks have been removed with intelligent design - using shoe press technology, full-width tail threading, and having no open draws.
Center roll based press section is a reliable, well-known concept combining close to 40 years of pressing technology experience with modern shoe press technology. A shoe press replaces a roll just before the first open draw. The resulting boost in dryness thus fully benefits web runnability in the open draw.
Pressing with metal belt technology boosts production capacity by eliminating unsupported open draws. It also increases the dry content after the press by up to 6 % due to more effective water removal at the press nip and evaporation over the hot metal belt. Furthermore, it improves several end product qualities, such as strength and porosity.
Wet end rebuilds
Rebuilding a paper or board machine, or a section of it, can improve the competitiveness of your business and your processes. But where do you start? Over the years, we have gathered plenty of experience and expertise in rebuilding all kinds of machines. We asked our experts to provide tips, advice and industry insight to help you demystify the rebuild process and created a practical guide book.
Download our e-book to learn how to develop a winning rebuild concept, how to minimize rebuild related risks, and how to ensure smooth ramp up to full production.
Pratt Industries started up their new PM 17 board machine in 2019 at Wapakoneta, Ohio. The start-up was a great success thanks to both extensive training and the unique opportunity to train their personnel on exactly the same type of OptiConcept M line at Pratt’s PM 16 machine in Valparaiso, Indiana.
Asia Symbol Paper's two Valmet paper machines, PM11 and PM12 set a reference quality level for the global and Asian markets. Xinhui PM12 is equipped with the latest technology like shoe and blade forming technology to create a competitive edge for Asia Symbol in the future.
In big grade conversion rebuilds, customers always want to be on the safe side as far as risks are concerned. Because the designed forming section was first of its kind, the prototype was tested at the Paper Technology Center in Jyväskylä. With the promising results of the pilot tests, Blue Paper was willing to implement the rebuild with Valmet.
UPM Tervasaari PM8 press section was rebuilt with a new metal belt technology that closes the draw between press and dryer. The competitiveness of their label papers is now improved due to better efficiency of the paper production and material usage.