Double-nip press with linear web run
Wet pressing is a vital part of paper and board processing and benefits both runnability and quality. The ultimate target of wet pressing is to increase sheet dryness to ensure paper and board machine drying capacity and also to enable web runnability at the beginning of the dryer section. The press section also has a great effect on sheet surface properties. Valmet’s OptiPress Linear, double-nip press with linear web run, is an ideal solution to fulfill papermakers’ requirements for effective pressing.
Excellent end product properties, high dewatering capacity and good runnability
The operating performance of OptiPress Linear has proven that the design principles employed – no open draws, shoe press technology, and full-width tail threading – provide excellent end-product quality, high-level dewatering capacity as well as good runnability. This results in a press section where press-related runnability bottlenecks, such as open draws, are a thing of the past.
The closed web run significantly reduces web breaks and thus improves runnability. OptiPress Linear also provides very good paper and board quality with symmetrical sheet properties, good moisture profiles, excellent dry content, and high production efficiency.
Shoe pressing with proven SymBelt technology
OptiPress Linear features SymBelt shoe press technology, which provides longer dwell times and higher press impulses that improve dryness after the press section. A high web dry content brings savings also in drying energy. The two straight press nips of OptiPress Linear produce a strong web and ensure good moisture profile in the web after the press section.
The OptiPress Linear press section meets the huge dewatering capacity requirements of high-speed paper or containerboard machines. The concept can be applied to both new lines and rebuilds.
Picture. OptiPress Linear for containerboard grades.
Benefits for paper and boardmakers
Valmet's OptiPress Linear press section provides:
Customer success stories
30% increase in recycled packaging production
Arkhangelsk Mill aims for competitive advantages after the rebuild of BM2. "We have a wide basis weight and end product format range for flexibility. We expect decreased costs and energy consumption: 15-20% heat savings, 8% electricity savings and 5% reduction in water consumption," says Alexander Tuvanof.
Optimal balance of scope, cost and time: Coated board machine of ITC PM1
“There is an increasing demand for packaging board in India and board has an important role in replacing plastics. We needed a trustworthy equipment supplier and technology which can convert raw material to a high-quality board in a cost-efficient way", says Sanjay Singh, CEO of ITC Paperboards and Specialty Papers Division.
Exploiting novel technology for producing lightweight grades
"We wanted a papermaking line that produces lightweight containerboard at high speed and with very good stability,” says Liao Changlv of Zhejiang Jingxing Paper.
World-class liquid packaging board machine
With the new BM1 and BCTMP line, Stora Enso Beihai meets the growing need for safe food packaging board in Asia. Reliability and stability were the key aspects of the technology chosen.
New BM1 and fully modernized off-coater - Metsä Board Husum
Metsä Board's OptiConcept M is the most modern FBB machine in Europe. It produces sustainable food service boards, such as cups, bowls, and plates with high quality, brightness, and lightness.
The 3rd life of a paper machine at Blue Paper after grade conversion
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.