Dilution upgrade

For hydraulic headboxes

Valmet's dilution control up grade, Valmet Dilution Retrofit*, is designed for hydraulic headboxes. It provides a cost-effective way to upgrade an existing slice lip-controlled headbox to a dilution-controlled one during an extremely short shutdown.

A cost-effective way to upgrade an existing slice lip-controlled

For all paper and board grades at any speed

Fewer web breaks and reduced broke

Valmet Dilution Retrofit is ideal for:

paper and board machines equipped with a SymFlo-type hydraulic headbox with slice lip control
all paper and board grades at any speed

The dilution profiling facilitated by the dilution retrofit has many clear benefits compared to slice lip profiling. In a dilution-controlled headbox, stock consistency is controlled by diluting it locally in the cross direction.

End product quality improves, thanks to the very uniform basis weight and fiber orientation profiles that can be controlled independently of each other (in contrast to slice lip control). Uniform profiles also contribute to fewer web breaks and reduced broke, and quicker startup after shutdowns and long breaks.

*earlier known as RetroDilution

Read more on Valmet IQ Dilution Profiler

Valmet IQ Dilution Profiler

Valmet IQ Dilution Profiler has been specially designed for achieving the best possible weight profile that a headbox can produce.

Board and paper news

Explore our latest news and learn more about our full-scope offering for the board and paper industries.

Dunafin enhances refining and fiber analysis with Valmet

Nov 14, 2024

Dunafin, member of delfortgroup, has always focused on producing high-quality grades while keeping operations efficient and sustainable. Recently, Dunafin took a significant step to modernize its refining process by implementing the Valmet Conical Refiner Pro and MAP Q Analyzer. Read the full article to learn how Dunafin achieved both the operational efficiency and the product quality with Valmet.

MM Neuss BM 5: Machine Diagnostics helped reduce web breaks

Nov 6, 2024

Valmet Performance Center supported MM Neuss remotely in a calender related on-demand expert support case that was alerted by Machine Diagnostics.

Automation upgrade accelerates sustainable growth at Melitta

Nov 1, 2024

Melitta Group is a family-owned global leader in coffee and household products. It recently completed a major upgrade in its coffee filter paper production by replacing the previous automation system with Valmet DNA.

Innovation in Järvenpää Paper Technology Center: Hard nip sizing with curtain application

Oct 30, 2024

Watch the video to learn more about Valmet’s novel innovation OptiSizer Curtain. The most recent innovation in surface sizing, hard nip sizing with curtain application, was developed and tested in Valmet’s Paper Technology Center in Järvenpää. The results from the pilot machine have been exciting: the sizer can successfully run up to 1700 m/min.

Increased sizer roll cover running time with Valmet support

Oct 25, 2024

PT. Tjiwi Kimia PM11 in Indonesia is a high speed coated fine paper line with significant annual production, where uninterrupted reliable running time is of the utmost importance. Cover change interval can be one limiting factor. The mill chose the Valmet service experts from Cikarang to aid in taking a step forward in sizer cover running time, forming a winning team together.

An innovative supercalender retrofit empowers diverse paper production at Shandong Sun Paper Co

Oct 23, 2024

This upgrade has enhanced the supercalender with a broader paper production capability. It allows for precise control of paper gloss, smoothness, and bulk.

Ceramic coating technology significantly enhances production efficiency: A case study from a mill in Central China

Oct 9, 2024

In the paper industry, equipment stability and production efficiency are crucial for the sustainable development of mills. A paper mill in Central China specializing in machines producing low-basis weight products recently encountered a series of challenges, including frequent web breaks, sticky pulp accumulation on the center roll surface, and a short doctor blade life. The mill partnered with Valmet to address these issues and enhance both production efficiency and equipment stability. This co...

MM Količevo BM 3: Investing for the future with OptiSizer Curtain

Oct 8, 2024

Watch the video to learn more about MM Količevo's OptiSizer Curtain investment. In October 2023 MM Board & Paper's rebuilt BM 3 board machine and the first-ever hard nip sizer with a curtain application were successfully started up at the MM Količevo mill in Slovenia. Prior to the rebuild, board machine BM 3 did not have a sizer. A prototype technology in sizing was chosen because it was the only technology flexible enough to fulfill all requirements of the product portfolio.