EagleBurgmannnow Logo

Cartex GSDN Gas-Lubricated Mechanical Seal

EagleBurgmann’s newly developed double Cartex GSDN gas seal is the ideal solution for centrifugal pump applications at chemical plants and refineries. Users can install bi-directional gas-lubricated Cartex GSDN seals to standardize their new pumps or to recondition existing pumps which have conventional stuffing box packings or liquid-lubricated mechanical seals.


  • HR principle is the characteristic design feature of the Cartex series: the seat and shaft sleeve rotate along with the pump shaft, while the springs remain stationary.
  • Internal pressurization together with centrifugal forces creates a self-cleaning effect at the sliding faces during ongoing operation. This prevents harmful contamination and increases operational reliability, especially in applications where the media contains solids.
  • High axial tolerance and the absence of dead space.
  • Wide sliding faces ensure high gas film stability.
  • U grooves are a standard feature and enable bi-directional operation of the seal.
  • Silicon carbide face materials and a high-strength coating ensure optimal performance in continuous operation.
  • Designed to withstand critical situations during start-up and shut-down or if a fault occurs in the buffer gas supply. Double-balanced Cartex GSDN seals remain closed and balanced even in these situations.

Operating limits:

Size: 1.1.25" to 4.000"

Pressure: (bi-directional)189 psi

Pressure: (uni-directional) 232 psi

Temperature:  -4°F -+ 392°F (depending on elastomer)

Speed: 13-49 ft/s


Get Connected!

Sign up now to receive the latest news on new EagleBurgmann products and case stories. Register Today