Dry Gas Seals

The Dry Gas Seals employed in our centrifugal compressors represent a significant advance in shaft sealing. This state-of-the-art solution will help by eliminating the ongoing maintenance costs associated with wet oil seals and thereby greatly increases equipment reliability and efficiency. The design of the Dry Gas Seal ensures best overall compressor performance as well as emission reduction for increased sustainability.

Why choose Siemens Energy Dry Gas Seals?

Cost reduction and productivity increase through depletion of unscheduled shutdowns
Ability to conduct rotor dynamics studies to increase rotor stability
State-of-the-art-design which allows for hassle-free installation
Elimination of seal oil consumption, leakages and contamination and other ongoing associated maintenance costs
Global Siemens Energy network of service centers, providing you a single point of contact for compressor maintenance and troubleshooting
Seal and compressor design from a single source ensuring best overall compressor performance
API 692 compliant

The heart of the DGS is a pair of rings. A stationary ring is held against a rotating ring by spring pressure. The contact face of the rotating ring incorporates special fil-riding geometries in the form of groves or tapered lands on the outer portion.

DGS designs:

Patented bi-directional groove design
Patented rotating seat centering
Liquid Phase Sintered Silicon Carbide
In-house Theoretical Gas Film Modeling
Single DGS - for restrictive applications
Double DGS - for lower pressure applications where zero emissions are a must
Tandem DGS - When a lower emission and high-pressure tolerant solution is needed (optional without intermediate labyrinth)
Carbon Ring Separation Seal - for protecting Dry Gas Seals from bearing oil ingress
Carbon Ring Process Seal - for minimizing clean gas flow and for maintaining clean process side environment

A dry approach to centrifugal compressor emissions mitigation

Our innovative sealing solution eliminates the need for a seal gas booster, protects dry gas seals from contamination, reduces maintenance and downtime costs.

Seal Protect sits between the dry gas seal and process side seal, remaining open during operation to prevent contamination. In static or low-speed conditions, it ensures only clean, dry process gas reaches the Dry Gas Seal.

Benefits of Seal Protect include: