Mechanical seals to API 682, 4th Edition (Category 1)


  • Chemical and petrochemical industry


  • Double cartridge seal

Technical Data

  • Pressure: Up to 20 bar
  • Temperature: -10 to 200 °C


The double cartridge seal is especially designed for use in the standardised installation spaces of the non-API pump MCPK (can also be used for CPKN + CPK).

The double cartridge seal can be connected to all common API Plans, such as 01, 02, 11, 31, 32 + 52, 53 (A, B).

The space between the two mechanical seals is flushed with a buffer or barrier fluid, depending on the application. This completely absorbs any leakage of the fluid pumped. 

In addition, the heat is transported away from this area. The double pressure balanced mechanical seal can be operated with pressurised barrier fluid or unpressurised buffer fluid.

Variant 4EDCB8T

Double mechanical seal for use with unpressurised buffer fluid (API Plan 52).

Variant 4EDCB8D

Double mechanical seal for use with pressurised barrier fluid (API Plan 53).

Further technical information for 4EDCB8T & D