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Reeling terminology and how to achieve proper roll structure

Proper roll structure requires carefully controlled winding, to enable the resulting parent reel to be stored and unwound in downstream processes in a trouble-free manner. This article presents a glossary of terms and description of roll structure.

Stainless steel care, cleaning, surface prep and passivating

Stainless steel is corrosion resistant and maintains a film of chrome oxide over its surface. Under normal conditions this film is self-healing.

Reel backlash due to worn parts causes sheet breaks, case study

Sheet breaks on PM1 are costing thousands of dollars. Valmet emergency service discovers backlash and further analysis provides temporary and long-term fixes.

Safety, operation and maintenance of water jet tail cutter

Beloit's original Water Jet Tail Clip was a hardworking tail cutter and its operation, maintenance and safety considerations are reviewed in this article.

Reducing coater variability with a coater beam replacement

Many existing coating station blade beams experience MD and CD coat weight variability due to a variety of factors. Replacing the blade beam with a Valmet OptiCoat beam reduces variability and improves end product quality.

Common hydraulic valves – cartridge counterbalance valves

Counterbalance valves prevent oil from leaving a cylinder that is holding a load. Without them, loads would move uncontrollably if oil pressure is lost.

Achieving boiler MACT (Maximum Achievable Control Technology)

The primary goal of a boiler tune-up is to improve efficiency with respect to combustion operations by re-establishing the air-fuel mixture for the operating range of the boiler and balance oxygen and unburned fuel.

Five checks at shutdown when inspecting rubber covered rolls

At a shutdown, to determine if the cover should be taken out of service for either regrind or recover, inspect the cover for these five issues.

Valmet Performance Center - process support agreement case study

The Valmet Performance Center is described, including how it works and actual results we have achieved with a customer while operating under a Performance Agreement.

The screening process, troubleshooting, warning signs and coating

Once a screen cylinder's holes plug or its raised plating or coating is worn smooth, a host of operational problems can occur affecting runnability, capacity, pulp quality and cylinder life. There are three warning signs of excessive wear to monitor.