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Chronic dryer drive oscillation and worn couplings, a case study

The clack-clack-clack noise warned of heavy oscillation in the drive, subjecting the machine to potentially damaging duress. The only known cure was a shutdown and restart, costing the mill productivity and dollars. The shift supervisor calls in a drive technician for assistance...

Reel process audits can reduce broke and defects near the spool

Reel equipment can take a beating during normal operation. Periodic inspections of the reel equipment are recommended to develop a baseline with regard to its process variables and mechanical condition.

Reduce downtime with press roll maintenance, three case studies

A scheduled service plan guarantees product quality and machine runnability. Case studies show downtime reduction with Valmet press roll scheduled maintenance.

Precise head fit prevents uneven loading and excess cover wear

Machine component precision fittings are critical to papermaking success. Commonly misunderstood, head fits are an important part of every roll repair program.

SymRoll troubleshooting - leakage, cover wear and vibration

For troublefree function of SymRolls, the following are troubleshooting and maintenance tips and procedures regarding oil leakage, hydraulic and pneumatic systems, roll cover wear, roll vibration and other roll change factors.

SAFETY BULLETIN: Precautions to take before refiner maintenance

Valmet has learned of a catastrophic failure of a Valmet Disk Refiner. Excess pressure was used trying to unplug an inlet pipe. No injuries, but much damage.

Troubleshooting doctors: loading, wear and roll surface marking

Some doctor problems are rather straight forward, readily recognized, and corrected. However, occasionally one will crop up that seemingly has no solution.

Planning roll maintenance yields the best uptime and efficiency

Operating machines at high speeds, longer operation periods between shutdowns and higher operating efficiency requires a planned roll maintenance policy.

Ten step procedure for patch repair of rubber roll covers

The trick is don’t rush the job; take your time and keep the patch area clean. You’ll need a Dremel, heating platen and uncured, un-vulcanized rubber stock.

SymSizer/OptiSizer beam setup, after applicator roll change

SymSizer or OptiSizer beam setup is required after every applicator roll change or whenever you feel there is an issue with starch/coating application. The goal is to set the applicator beam parallel with the new applicator roll.