CobaSeal

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CobaSeal

CobaSeal
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Item Description
1 Seal face, stationary
2 Seat, rotating
3 Thrust ring
4 Spring
5 Shaft sleeve and seat retainer
6 Housing (size matched to installation space)
D Separation gas

CobaSeal

Features

  • Gas-lubricated
  • Bi-directional
  • Ready-to-fit cartridge unit
  • Self cleaning 3D gas grooves
  • Aerostatic and aerodynamic lift-off

Advantages

  • Extremely low leakage
  • Double arranged (co-axial) dry gas seal with just one pair of seal faces
  • Insensitive to oil contamination due to its special design
  • Wear-free, non-contacting operation in all conditions
  • Insensitive to radial vibrations due to axial sealing gap
  • Slow-roll or turning operation capable (static lift-off)
  • No limits regarding dew point of separation gas (silicon carbide instead of carbon)
  • Lower N2 consumption than any other system
  • N2 can be switched off during standstill - the gap will close and still provide the best oil sealing performance
  • Best in class oil sealing by extremely small sealing gap and sling effect of rotating ring

Operating range

Shaft diameter:
27.2 ... 323.2 mm (1.07" ... 12.72")
Design pressure (mechanical integrity):
p = 0 … 70 bar (0 ... 1000 PSI)
Normal operating pressure:
p = 2.7 bar (39.16 PSI)
Temperature:
t = -20 °C … +200 °C (-4 °F … +392 °F)
Sliding velocity:
vg = 0 ... 150 m/s (0 ... 492 ft/s)
Dew point: No limitation

Materials

Seal face: Silicon carbide*
Seat: Ductile stainless steel*
Shaft sleeve: Stainless steel TC-coated
Secondary seals: FKM
Metal parts: 1.4006

* With special EagleBurgmann high performance iDLC (in situ Diamond-Like-Carbon) coating

Standards and approvals

  • NACE
  • API 692

Notes

Since it was launched on the market, this innovative sealing solution has proven its worth worldwide in both first fit and retrofit applications. It consists of a rotating seat made of ductile material and a stationary, spring-loaded seal face. The separation gas is routed through axial holes in the stationary seal ring into the middle of the sliding face. It is then divided in the sealing gap into two leakage flows which are routed to the inner and outer diameters of the seal face.

Dimensions on request.

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The Eagleburgmann Group

Sealing technology for plants and machines

EagleBurgmann is one of the worldwide leading providers of industrial sealing technology. Mechanical seals, seal supply systems, magnetic couplings, carbon floating ring seals, expansion joints, gaskets and packings as well as comprehensive services are used wherever reliability and safety are needed.

Mechanical seals and more

Sealing technology by EagleBurgmann is used worldwide in oil and gas industries, refineries, the petrochemical, chemical, and pharmaceutical industries, food processing, energy, water, mining, paper, aerospace, and other industries. Close to 5,800 employees provide their ideas, solutions, and commitment so that customers can rely on our sealing technology.

What makes us stand out is our excellent quality, great innovative capacity, and an extensive product portfolio for nearly all industrial processes and fields of application. Our product portfolio includes everything from mechanical seals and seal supply systems to magnetic couplings, carbon floating ring seals, expansion joints, and gaskets and packings as well as comprehensive services. Since we are part of the German Freudenberg and Japanese EKK group, we have all the necessary resources for a firmly based reliable partnership.

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