PDGS For a larger view, please mouseover the image.
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PDGS Tandem seal with intermediate labyrinth

A Primary seal gas supply
B Primary vent
C Secondary gas seal supply
S Secondary vent
D Separation gas supply

Item Description
1 Seal face, stationary
2 Seat, rotating
3 Thrust ring
4 Spring
5 Shaft sleeve and seat retainer
6 Intermediate sleeve
7, 8 Housing (size matched to installation space)
9 Separation seal (CSR)
10 Labyrinth
11 Intermediate labyrinth

Product links separation seals:
EagleBurgmann CSE
EagleBurgmann CSR
EagleBurgmann CobaSeal
  • Gas-lubricated
  • Uni-directional or bi-directional
  • Elastomer-free
  • Ready-to-fit cartridge unit
  • Single, double, tandem seal and tandem with intermediate labyrinth available
  • Separation seals as labyrinths, carbon rings or CobaSeal are optionally available
  • Wear-free and contact-free operation
  • Self-cleaning 3D gas grooves
  • High gas film stiffness
  • Secure cupped retainer for seat
  • Available in various materials for optimized chemical resistance
  • Proven, reliable and economical solution
Shaft diameter:
Ds1 = 29 ... 390 mm (1.14" ... 15.35")
p = up to 450 bar (6,525 PSI)
t = -200 °C … +230 °C
(-328 °F … +446 °F)
Sliding velocity:
vg = up to 227 m/s (744 ft/s)
Seal face: Silicon carbide with DLC coating
Seat: Silicon carbide with DLC coating
Secondary seals: Polymer rings
Metal parts: 1.4006, 1.4313, Inconel® or other stainless steels.

Other materials on request.

Available also with EagleBurgmann DiamondFace technology.
  • Oil and gas industry
  • Refining technology
  • Petrochemical industry
  • Hydrocarbon gas
  • Ammonia
  • Nitrogen
  • Refrigerants
  • Air
  • Centrifugal compressors
  • Turbo expanders
  • Blowers
A well-established compressor seal for high pressure and both low and high temperature applications. Innovative design features allow it to cope with even the highest pressures without problems. The application of U-cups and special dynamic sealing elements opens up a wide range of uses for this versatile and successful seal series.

Dimensions on request.