Item Description
1 Seal face, stationary | Option: Primary seal face with DiamondFace coating
2 Seat, rotating | Option: Primary seat with DiamondFace coating
3 Shaft sleeve
4 Labyrinth
5 Trust ring
6 Option: "Smart labyrinth"
7 Option: Labyrinth as back-up seal (PTFE labyrinth)
8 Housing (size matched to installation space)
9 Adapter Sleeve
10 Separation seal | Option: CobaSeal


A  Seal gas supply | Option: Improved seal gas extraction
W  Seal washing system
B  Vent
D  Separation gas supply

RigiSeal

Features

Developed in coorperation with MAN Energy Solutions, based on the extremely robust EagleBurgmann RoTechSeal

  • Modular design
  • As upgrade of MAN centrifugal compressors or for new projects
  • Availabe as single, double, or tandem seal
  • Gas-lubricated
  • Uni- or bi-directional
  • Ready-to-install unit
  • Optionally with separation seal such as labyrinths, carbon rings or EagleBurgmann CobaSeal

Advantages

The RigiSeal is the efficient sealing solution when the supply gas is particularly contaminated (e.g., by particles/liquids). Due to the modular design principle, the seal can be adapted on a case-by-case basis for existing machines as well as for new projects. For this purpose, the respective seal features are defined according to the prevailing operating conditions and/or the result of the failure analysis.

RotechSeal Features
  • "Smart Labyrinth"
  • DiamondFace coating
  • Self-cleaning 3D gas grooves
  • Soft torque transmission
  • Debris resistant dynamic sealing element
  • Leakage optimization
  • CobaSeal (co-axial separation seal)

Additional RigiSeal Features
  • Improved seal gas extraction (Subsea Compressor Technology)
  • Seal washing system
  • Simplified support system
  • Labyrinth as back-up seal (PTFE labyrinth)

Operating range

Shaft diameter:
d = up to 410 mm (16.14")
Pressure:
p = up to 450 bar (6,525 PSI) and more
Design-temperature:
t = -200 °C … +230 °C (-328 °F … +446 °F)
Sliding velocity:
vg = up to 227 m/s (744 ft/s)

Project specific special designs possible

Materials

Seal face: Silicon carbide with DLC- or DiamondFace-coating
Seat: Silicon carbide with DLC- or DiamondFace-coating
Secondary seals: PTFE or FKM
Metal parts: 1.4006, 1.4313-QT650, 1.4418, 1.4542, Inconel® or other stainless steels

Other materials on request

Standards and approvals

  • NACE
  • API 617
  • API 692

Notes

One of the biggest challenges in operating centrifugal compressors with dry gas seals is contamination from the supply gas. Liquids or particles in the supply gas are the main causes of shortened seal life. Thanks to special features, the RigiSeal extends the lifetime of a normal seal in a particularly wet and dirty environment or in very difficult applications.

Dimensions on request.
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