Mechanical Seals
Pumps equipped with mechanical seals are of the standard pusher bellows type or wedge style. They can be expected to provide long and
troublefree service provided:
1) Seal materials are compatible with pumped fluid and properly applied to the service.
2) Adequate cooling and lubrication is provided
3) Dry running is avoided
4) Abrasives are kept away from the seal area
5) Pump and driver are properly aligned
Detailed mechanical seal inspection and replacement instructions are included with Oberdorfer Repair Kits.
Lip Seals
Pumps equipped with lip seals are of the metal cased, spring energized, single lip style. These are intended to provide minimum friction drag
with positive sealing and again should be maintenance free provided the same conditions for mechanical seals are met as well as:
6) Avoid scouring of the shaft in the lip seal area due to contaminated abrasives
7) Avoid excessive seal lip contact pressure on the pump shaft due to excessive pump pressure.
These are readily replaceable by pressing out the old seal and pressing in a new replacement.
Packing
Pumps equipped with teflon or graphoil packing require periodic adjustment as described above in the Startup section to avoid excessive
leakage. Eventually all the packing in the pump will become deteriorated and will have to be replaced.
Recommended Spares
Repair kits are available for all Oberdorfer Bronze Gear Pumps. Each kit comes with detailed instructions. For the proper kit, contact your
Oberdorfer Distributor or the factory.
