Customer case:

Roll change interval increased from one to two years in Papierfabrik Adolf Jass

Dec 9, 2020

When recycled paper is used, more impurities are created compared with primary fibers. This may cause stronger seal wear. Papierfabrik Adolf Jass solved the problem with Valmet’s non-contacting suction roll axial seals.

We have hit our target for increasing the roll running time and the system operates satisfactory. We would go for it any time again.”
Siegfried Brauchle, Mechanical Manager in Adolf Jass Fulda mill


Location Papierfabrik Adolf Jass in Fulda mill, Germany
Customer challenge Maintenance interval of the rolls equipped with axial seal strips was originally between 8 and 9 months at the mill.
Solution Valmet has modernized the suction rolls of PM3 and PM4 with Valmet Lock Seal seals. Lock Seal operates mainly without contact or with a very light contact with the inner surface of the roll. Thanks to low friction, the lifetime of the roll is increased significantly.
  • After two years of operation in the PM4 suction roll with regular maintenance, the condition of the Lock Seal seals was so good, that they could have been reused.
  • By using Lock Seal seals, the maintenance interval could be extended to 24 months.
  • The customer has plans to extend the maintenance interval even more in the future.

Technical data

Grades: Corrucated base paper
Roll position: Combi suction roll
Design speed: 900 m/min
Trim width: 5,560 mm