Rod beds for board and paper machines

Rod beds are characterized by three attributes: reliability, performance and reusability. By reliability we mean better and more stable runnability for your process. For us, performance includes long lifetime with excellent results. Reusability then, means less waste and significant cost savings.

We divide our vast selection or rod beds into three main groups by their material and design. Polyurethane (PU) rod beds, polyethylene (PE) rod beds and insert rod beds.

Read the performance of Valmet Rod Beds below in terms of paper quality, length of lifetime and cost efficiency - with 5/5 being the highest performance and 1/5 as the lowest.

Rod bed portfolio
Rod Bed Description Paper quality Long lifetime Cost efficiency
Rod Bed PU Excellent profitability in smooth rod coating and superior tolerance against impurities in recycled fiber process 5/5 5/5 4/5
Rod Bed PE-UHMW Long lifetime in virgin fiber grooved rod process 4/5 5/5 3/5
Rod Bed PE-insert The most cost efficient rod bed type 3/5 3/5 5/5
Customer case: Excellent results with Valmet Rod Bed PU
Customer case #1: Better coat weight profiles

For comparison between Valmet Rod Bed PU and a competing PE rod bed, we monitored the coat weight profiles at a customer’s machine with two-sided film sizer. The coat weight was 8 g/m²/side.

The results showed, that Valmet Rod Bed PU has excellent profilability – the basis weight profiles at PM reel were much better compared to peaky profiles competing PE rod bed.

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Customer case #2: Tolerance against impurities from recycled fibers

The excellent tolerance of Valmet Rod Bed PU against impurities from recycled fibers leads to increased lifetime of rod beds and hence decreased costs.

It was shown at a customer’s machine, that Valmet Rod Bed PU can be reused 4 times after the grooved rods have been worn out, leading to 6 weeks’ average lifetime of Valmet Rod Bed PU. At the same time, the average lifetime of competing PE rod beds was less than 4 weeks. The annual costs of rod beds decreased by 36%.

RESULTS FROM CUSTOMER CASES
Valmet Rod Bed PU can be resused four times after the grooved rods have been worn out
Excellent profiling properties with Valmet Rod Bed PU
Much better basis weight profiles at PM reel compared to competing PE rod bed