METAX GmbH (en) > Reconditioning of seals

Reconditioning of mechanical seals

Mechanical seals are subject to wear caused by their operating principle. The amount of damage essentially depends on the individual operating conditions.
In many cases mechanical seals may be reconditioned by professional work into a condition as good as new.
Due to prior damage analysis unfavourable operating conditions will be recognized. On request qualified modifications on the seal may be recommended to extend the operating life time.

Sediments before and afterwards

Sediments before and afterwards

Breakouts at carbon seal face

Breakouts at carbon seal face

Replacement of carbon insert

Replacement of carbon insert

Analysis of damage

  • Condition of the seal faces
    • Uniformity of wear pattern
    • Wear tracks
    • Formation of cracks
    • Breakouts
    • Breakouts at the corners
    • Chemical attack of material
  • Condition of secondary seals
    • Elasticity
    • Wear tracks
    • Formation of cracks
    • Chemical attack of material
  • Condition of positive drive
    • Wear tracks
    • Movability
    • Cracks or breakouts
  • General condition
    • Wear tracks on seal faces for secondary seals
    • Chemical attack of material

Carry out of reconditioning

  • Cleaning of all parts which are used again
  • Polishing of all sealing surfaces for secondary seals
  • Relapping of seal faces or replacement by new parts
  • Replacement by new parts
    • All secondary seals
    • Elastomeric bellows
    • Springs (with small dimensions)
    • Other parts if necessary

General hints

METAX will carry out repair services for any type of mechanical seal independent of the manufacturer. For complete cartridge seals an assembly drawing should be included if possible.
To make a complete analysis of damage all operating parameters should be available.
Delivery of complete new seal is often more economic on small sizes.
Reconditioning is only possible when receiving all parts. Chemical neutralization, if necessary, should be carried out prior to shipment. Packing should be carried out carefully. Especially seal faces should be protected against mechanical shock loads.