Suitable for KSB's HPK-L / Etanorm RSY pump type series


  • hot water 
  • heat transfer fluids


  • Single cartridge seal

Technical Data

  • Operating pressure: 
    • 0 bar dynamic, for continuous operation
    • For short periods up to 16 bar in the event of an inboard seal failure
    • 24 bar static
  • Temperature: 0 °C to 100 °C


Combined with a single KSB 4HL mechanical seal this is an optimum sealing solution for demanding fluids.

The mechanical seal is used with quench (unpressurised buffer fluid) for pumps handling hot water and thermal oils to prevent dry running or cracking of the thermal oil when in contact with atmospheric oxygen.

The modular design facilitates installation without assembly fixtures or adjusting dimensions.