Moisture Streaks After Dryer Section — What to Check?

FAQ

Investigate moisture streaks after the dryer section:

1. Uneven dryer fabric CFM distribution — Map CFM across the fabric width
2. Seam CFM mismatch — If streak frequency matches seam spacing interval, the seam permeability doesn't match the body
3. Blocked pocket ventilation — Check PV system airflow and duct condition
4. Press section moisture profile — Streaks may originate in the press, not the dryer
5. Condensate removal issues — Check siphon and blow-through systems
6. Uneven fabric-to-cylinder contact — Verify tension uniformity and cylinder surface condition

Diagnostic tip: If streaks are present immediately after the press section, the root cause is likely press-related. If they appear or worsen in the dryer section, focus on dryer fabric and ventilation.

---

Technical Background

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

Related Resources

• 📖 View our Product Knowledge for more information
• 📋 Browse Troubleshooting related articles
• 📞 Contact PAPTEX Engineers for personalized recommendations for your paper machine

Last updated: July 2026