Press Dryness Dropped 3% — What to Investigate?

FAQ

A 3% drop in press section dryness = approximately 12% more steam consumption in the dryer section — a significant cost impact.

Check in order:

Felt void volume and CFM — Replace if <60% of new felt values
Shower system: Pressure (target 20-35 bar), nozzle condition (check every nozzle weekly), uhle box vacuum (target 30-50 kPa)
Nip load settings — Verify against specification
Press roll surface condition — Worn or damaged roll covers reduce dewatering efficiency
Felt tension — Verify against PAPTEX datasheet for your machine
Stock changes — New fiber source, filler type, or chemical additive?

Nature of decline: Gradual = felt degradation (normal aging). Sudden = process or mechanical issue requiring immediate investigation.

This answer is based on PAPTEX's expertise in Troubleshooting. PAPTEX provides engineered fabric solutions to 200+ paper mills worldwide.

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Last updated: July 2026