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Troubleshooting charts for eight categories of hydraulic problems

The following troubleshooting guides cover five categories of hydraulic problems. Possible causes and remedies are listed for each type of trouble. Causes are listed in order of probability; remedies are listed adjacent to the associated cause.

SymSizer size press uneven nip loading solved, a case study

This case study is for a size press which had intermittent problems with sheet breaks when the rolls were nipped up. The problem did not occur every time, so it was difficult to troubleshoot.

Know your OSHA and ANSI safety color codes for all hazards

Color coding is a brilliant safety idea because workers can tell at a glance - almost without thinking - that they’re facing a hazard and how bad that hazard is.

Yankee rebuild improves tissue quality, a case study analysis

Rebuilding a Yankee is a daunting decision, due to OSHA regulations for confined space entry and the significant cost of downtime. This mill was losing product due to poor tissue quality, and Valmet's service engineers assisted in the decision making process to rebuild the Yankee.

Attenuators - operation, maintenance and troubleshooting

A pulsation attenuator, inserted in the stock approach piping, acts as a buffer for the headbox against pulsations developed by stock system components.

A solution for jumbo roll bouncing in the secondary arms

A mill reported that their jumbo rolls were bouncing. This started after their reel's flattened secondary arm rollers were replaced with fresh, round rollers...

Forming section field services identify potential problems

Forming section services diagnose potential or actual problems and their solutions. Scheduled services ensure reliable, safe and efficient operation.

Indah Kiat Perawang 50% time savings in doctoring, case study

When IKPP Perawang wanted to boost machine runnability and performance, they challenged Valmet's specialists to find potential areas for improvement.

Two front splicing methods and safety precautions with each

Two efficient winder front splicing methods are presented. Front splicing is more dangerous than rear splicing, i.e. nip hazards. One person should supervise.

Off-machine coater splicing is affected by several parameters

Splicing efficiency on coaters averages about 98%. Variables that affect the splicing process include primary roll speed match, paster roll speed match, paster roll gap, paster roll pressure, paper caliper/hardness profiles, splice tape pattern and tail length.