In a paper mill in Groningen Sulzer pumps are sealed with packing and equipped with a grease lubrication system.
This gives a MTBR of a year, costs for labor for the packing replacement and every 2 weeks of adjusting to grease.
Pump revision and shaft sleeve every 2 years
The Sellon solution
The pumps are modified to a mechanical seal with a small adjustment: Chesterton seal Type S10 in combination with a Spiral Trac.
The result an MTBR of 5 years without further maintenance costs