Valmet sizing

Improving strength and surface properties

Valmet’s sizer product family offers all application methods and all paper machine sizes available - spray, film and pond application and a new types of a sizer with hard nip rolls and curtain sizing. All sizers have a robust and modular construction combined with high functionality and quality with a low total cost of ownership. In surface sizing or size application, starch, or other types of size or pigmented size, is applied to the paper web surface to improve its strength, surface properties or water resistance. Sizing is often used to modify surface properties before coating.

Discover Valmet sizing section selection

Get to know our two sizing section product families: OptiSizer sizing sections and IntelliSizer sizing sections. Click on the links below to read and find out more on our sizing solutions.

Valmet’s sizers feature smart construction

You can rely on Valmet's sizing solutions, which are proven and safe. The sizers have excellent reliability; they need less maintenance and there are less unexpected shutdowns.

When you are purchasing a new sizer, the scope of delivery will be clear and the solution will be flexible for auxiliary or optional choices. The design is done for easy upgrades when needed.

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If you wish to get further information like technical specifications, need a quotation, or wish to discuss different solutions, fill in the contact form and our experts will contact you shortly.

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Learn more about our OptiSizer solutions

OptiSizer Film sizing

OptiSizer Film offers a functional and innovative design, based on know-how and long experience. Its simple and reliable design results in easy operation, installation and fast initial start-up.

OptiSizer Hard sizing

OptiSizer Hard is uses higher nip loads to improve sheet strength properties by taking advantage of better starch penetration and decreasing fiber to fiber distance.

OptiSizer Curtain sizing

The new surface sizing method applies the starch as a curtain of size. When combined with hard-covered rolls the results with coated cartonboards are significant: stiffness, quality and production increased, and energy and raw material consumption reduced.

OptiSizer Spray sizing

In surface sizing, the size is sprayed on nip rolls through a row of spraying nozzles. Then, the size is transferred to the web in the nip. You can control the amount of size accurately and fast, and there are no consumables due to contactless application, which leads into decreased downtime.

OptiSizer Combi sizing

OptiSizer Combi combines different size application methods in one process to benefits of both technologies when paper top and bottom sides have completely different needs.

OptiSizer Pond sizing

Pond size application technology is primarily designed for specialty paper grades, heavy printing papers, and for board when through-sizing is needed.

Learn more about IntelliSizer sizing sections

IntelliSizer

The IntelliSizer improves paper properties such as strength and printing qualities by adding chemical substances to the paper web. The IntelliSizer family consists of three Size Press types: Pond, Metering, and Hybrid. The IntelliSizer is equipped with a carbon fiber application head. The Metering Size Press reduces or eliminates pond turbulence, poor pickup control, low solids concentration, sheet edge problems, higher after drying demand, uneven reel profiles, and additional sheet breaks. Chec...

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Mondi Ružomberok PM19 - From OCC to board

Jun 7, 2023

Join us on an exciting journey at Mondi Ružomberok's state-of-the-art paper machine PM19! Discover how they turn recycled fibers into high-quality containerboard with Valmet's innovative technology.

Sizer pilot trial opportunities at Valmet Paper Technology Center

Sep 12, 2022

Experience our sizer pilot opportunities in Järvenpää, Finland, where you can pilot and test all the size application methods with your paper or board. The sizer pilot facility has been updated some time ago to be even better and to correspond more accurately to the mill environment.

Innovation spotlight: new hard nip sizing technology

Aug 12, 2018

OptiSizer Hard is Valmet’s completely new size application method, which uses higher nip loads to improve sheet strength properties by taking advantage of better starch penetration and decreasing fiber to fiber distance. Also, the life cycle costs of the sizer are lower due spray application and runnability is better due to better nip profile control.

Read our latest customer success stories about Valmet sizer deliveries

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Liansheng Pulp and Paper: big success with PM 1 carton board and PM 3 high-grade fine paper lines

Feb 27, 2024

Living up to expectations, Liansheng’s PM 1 carton board and PM 3 high-grade fine paper production lines have been recognized as a success not only by Liansheng, but also by their customers.

Elevating containerboard manufacturing in India

Dec 13, 2023

Sri Andal is aiming at producing high-quality containerboard with tangible efficiency improvements and Valmet offers a suitable solution for achieving these targets.

Mondi Ružomberok PM 19 – A complete delivery from OCC to board

Jun 7, 2023

Want to know the secret behind Mondi Ružomberok PM19's successful paper production? Check out this fascinating reference story that takes you behind the scenes of their new containerboard machine.

Asia Paper Manufacturing uses OptiSizer Hard to improve board strength

Jan 2, 2023

Asia Paper Manufacturing in the Republic of Korea had an ambitious target to improve the board strength values. They invested in OptiSizer Hard. Compared to conventional sizers, it pushes starch deeper into the board web improving the overall strength values.

Innovative paper technology meets digital solutions

Nov 4, 2022

Combining innovative paper technology with advanced Valmet Industrial Internet solutions and services when making capital investments in the board and paper industry brings significant benefits. It ensures a rapid ramp-up, optimizes paper quality, boosts sustainability and saves total costs of ownership.

Palm Aalen PM 5 – a sustainable investment for the next 50 years

Oct 19, 2022

PM 5 at the Papierfabrik Palm Aalen-Neukochen site in Germany is the world’s widest high-capacity containerboard line. It is an investment for the next 50 years and has been producing high-quality and sellable board since the start-up in July, 2021.

A 15-year collaboration has made Valmet an all-round developer for Liansheng Paper

Aug 12, 2021

During the past 15 years, Liansheng Paper has been deepening its cooperation with Valmet through several equipment deliveries to its sites in Changtai, Longhai and Zhangpu.

Soft rubber covers for sizing

Mar 11, 2020

Sizing adds value to the paper quality by enhancing its properties. Sizing paper with starch can increase both the surface strength of the paper, as well as the bulk strength. Sizing or pigmenting can also be applied with PVA or silicone which transforms the base paper into release paper.

How to plan a successful rebuild?

Rebuilding a paper or board machine can improve the competitiveness of your business and your processes. Download our e-book to learn more.

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Interested in pilot trials?

Get in touch with our pilot trial experts to discuss how you could benefit from our pilot trial services.

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Learn more about the services and automation solutions for sizing

Sizer consumables

Sizer consumables play an important role in film sizing and coating. When you choose products that are optimized for your machine and process, you chieve outstanding paper quality, maximized production capacity and a stable process. Our consumables have excellent wear resistance – meaning less downtime and fewer consumables used, and, thus more production and lower costs. 

Sizer roll covers

The film sizing and film coating process have a direct impact on paper and board quality, both on paper strength as well as on paper appearance. Moreover, as on-line processes they are critical for the paper machine line efficiency. This puts high demands on the sizer roll covers.

Workshop and roll services

How does your business sound like? Hopefully, there are no roll related vibrations, annoying production breaks or disturbing shutdowns. Valmet Workshop and Roll Services offer a winning combination of the latest roll technology and maintenance expertise. We help you eliminate unplanned shutdowns, increase the running times of rolls, improve the end product quality and lower the roll maintenance costs in long-term.

iRoll technology

Valmet iRoll technology improves production efficiency and product quality by assuring optimal runnability of board and paper machines. Papermaker can obtain significant cost savings by improved nip profiles, parent roll hardness profiles and tension profiles as well as printer and converter satisfaction.

Tail threading

A reliable tail threading process decreases tail threading times, minimizes waste and improves safety. This means an investment in your process is an investment that pays for itself. Whether you need improvements in paper or board machines, we have an advanced tail threading solution that clearly enhances your production efficiency. Our comprehensive range of tail threading services, from preventive maintenance to tail threading study secures optimal operation of your equipment and reduces threa...

Automation for Board and Paper

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Valmet sizing

Improving strength and surface properties

Discover Valmet sizing section selection

Valmet’s sizers feature smart construction

Read more about Valmet's air drying & chemical systems, which complete high-quality coating & sizing

Explore our latest board and paper press releases