Reliability
Valmet puts safety before anything else in our daily operations. We're also committed to supporting you in reaching your safety targets.
We provide reliability services that keep your equipment and processes running smoothly. We make sure that spare parts and components are easily available with minimal inventory costs. Reliable deliveries ensure that material is managed efficiently at your site every day.
Our maintenance and shutdown management services help you to keep your production assets in good working condition, minimizing downtime and controlling maintenance costs. We offer services for planning and implementing annual shutdowns to avoid cost and schedule overruns.
Reliability
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Field Report - Suction roll packing strip grooving, a case study
A paperboard mill suffered from unexplained grooving in the suction and couch rolls and sealing strips. The fog shower was identified as a culprit.
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Field Report - Improving suction roll performance
To optimize the efficiency of and ensure the best return on a suction roll investment, mill maintenance departments should follow some basic guidelines.
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Field Report - Function and setup of size press sealing blade
Properly functioning sealing blades in a metered size press prevent air from entering the application chamber while lubricating the blade tip/applicator roll interface. Periodic checks of the blade setup are essential for a long and trouble-free blade lifetime.
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Field Report - Forming fabric ridging problem, a case study
Distortions in fabrics, such as ridges, cause basis weight profile problems. In this case study, the culprit was found to be a tiny speck of rust - which created a large and expensive problem.
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Field Report - Improving rope runs, a case study
In this case study, two paper machines were rebuilt to improve their rope runs. The rope systems were made much more reliable by making a minimum of changes. Valmet changed the transfer philosophy from tear-off to tail-release. The results were less fouling of return runs and less debris.
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Field Report - Troubleshooting rope runs
Rope runs can be complex, and a poorly designed run can decrease machine complexity. They should be assessed periodically to find and correct problem areas.
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Field Report - Suction roll bearing vibration, a case study
At a North American mill, analysis of unusually high vibration levels from a suction roll back internal bearing point to a recent speed increase.
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Field Report - Suction roll bearing maintenance tips
One of the most sensitive components of the roll, the internal bearing is difficult to maintain and unforgiving when it fails. Accelerometers are an effective means of monitoring and predicting suction roll bearing failure.
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Field Report - Optimizing drying efficiency
Increased felt tension can optimize drying efficiency and improve paper quality. However, a thorough evaluation of machinery and close monitoring of felt tension, along with a complete maintenance program, are the keys to a headache-free dryer section.
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Field Report - Press diaphragm causes work stoppage, a case study
A chronic press load/unload diaphragm rupturing problem crippled the operation of the press at a mill. Plate and diaphragm misalignment were only part of the problem. Further analysis pointed to nipping roll diameter changes and incorrect diaphragm specifications.