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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.

Yankee creping problems and too many regrinds, a case study

In this case study, creping problems on a Yankee correlated with frequent regrinds. Analysis by the OEM specialist discovered misalignment, and made procedural recommendations to resolve the problems.

Maximize baling line efficiency and minimize cost with an audit

A professional baling line audit from Valmet will ensure optimal use of the installed equipment and maximize efficiency while minimizing service costs.

Niploading of SymSizers - problems, corrections and maintenance

Nip loading varies based on the type of size / coating applied, the roll crowns and the incoming sheet. Wrinkles, skewing and e-nip profiles are important.

Coater backing roll showers - purpose, layout and setup

Showers on the coater backing roll lubricate, cool and prevent coating buildup. This extends roll lifetime and can reduce coater-related sheet breaks.

Dryer can warm-up / cooldown guidelines and typical procedure

The purpose of dryer can warm-up/cooldown procedures is to permit uniform expansion or contraction of all components of the dryer system in order to minimize thermal stresses in the equipment.