CobaDGS - Zero Emission Solution
CobaDGS - Zero Emission Solution
CobaDGS drawing
E* Buffer gas supply - optional
A Seal gas supply
B Primary vent
C Secondary seal gas supply
S Secondary vent
D Separation gas supply
| Item | Description |
| 1 | (Seat) Rotating seal face |
| 2 | (Seal face) Stationary seal face |
| 3 | Thrust ring |
| 4 | Spring |
| 5 | Shaft sleeve |
| 6 | Housing |
| 7 | Labyrinth |
| 8 | DGS as secondary seal |
| 9 | CobaSeal as separation seal |
| 10 | Intermediate labyrinth |
CobaDGS - Zero Emission Solution
Features
The sealing solution for reduction of methane-/ process gas emissions
- Gas-lubricated
- Bi-directional
- Ready-to-fit cartridge unit
- Available for following seal arrangements: single and tandem
- Co-axial primary seal
- Separation seals as CobaSeal, carbon rings or labyrinths optional
Advantages
- No methane-/ process gas emissions
- Supplied with clean nitrogen (no dew point and dirt problems)
- Robust
- Offers higher safety than a double seal
- Upgrade-possibility of existing single, double and tandem seals
- No modification of the compressor necessary
- Efficient alternative to hermetically sealed systems
- For compressors with gas- and steam turbines, as well as with electric drive
Materials
Stationary seal face: Silicon carbide with DLC-coating, DiamondFace-coating optional
Rotating seal face (Seat): Silicon carbide with DLC-coating, DiamondFace-coating optional
Secondary seals: FKM or other elastomers, depending on product gas composition
Metal parts: 1.4006 or other stainless steels
Other materials on request.
Dimensions on request.
Rotating seal face (Seat): Silicon carbide with DLC-coating, DiamondFace-coating optional
Secondary seals: FKM or other elastomers, depending on product gas composition
Metal parts: 1.4006 or other stainless steels
Other materials on request.
Dimensions on request.
Standards and approvals
- NACE
- Compliant to TA Luft (German Clean Air Act) (tandem seal)
Recommended applications
- Pipelines
- Gas storages
- Oil and gas industry
- Chemical industry
- Power plants
- Centrifugal compressors
- Turbo expander
- Turbines
- Pumps
- Blower
- LNG
- CCUS
- Hydrogen
- Alternative fuels production
- Power generation
Product variants
Optionally available
High pressure nitrogen generator
On-site generation of nitrogen.
Ensures continuous, uninterrupted nitrogen supply
Solves the logistics problem, especially for sites in remote, hard-to-reach areas.
No more hassle transporting the nitrogen.
Nitrogen generation is based on pressure swing adsorption. Storage at 330 bar – for intermittent generation/compression and back-up supply – then reduction to the required pressure.
The complete nitrogen production and supply system comes in a container which should be installed out of ATEX area.
Required power supply: Heavy current, 400V, 50Hz/60Hz, 3 Ph
Similar products
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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
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- Gas-lubricated
- Uni- or bi-directional
- Ready-to-install unit
- Optionally with separation seal such as labyrinths, carbon rings or EagleBurgmann CobaSeal
RoTechSeal
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