Dry Gas Seal -DG820
Features:
- Tandem Seal
- Unidirectional or bidirectional available
Typical Applications:
Designed in compressors handling various hazardous process media.
Mediums:
For handling hazardous process media:natural gas,cryogenic gases,ethylene/propylene,ammonia,recycle gas and syngas
Performance Capabilities:
Pressure: 0~ 20.0 MPa
Temperature: -100 ~ 260°C
Linear Speed: ≤240 m/s
Material Selection:
Metallic Components: 1Cr13, 304, 316L, 2507, TA2
Spring: 316L, Hastelloy C-276
Seal Rings: SSiC , WC, Graphite
Elastomer Options: FKM, FFKM, EPDM, NBR , OMNISEAL
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Technical Features:
1.Two single dry gas seals arranged in a tandem configuration. If the primary seal fails, the secondary seal immediately takes over as the main seal—preventing leakage and ensuring safe compressor shutdown.
3.The primary seal gas（typically process gas）is maintained at a pressure higher than process medium pressure,primary leakage is a mixture of process gas and secondary seal gas, vented to the flare header.
2.Secondary seal gas (buffer gas) typically uses low-pressure nitrogen to achieve zero process gas emissions to the atmosphere.
3.Secondary leakage, comprising a secondary seal gas (buffer gas) and separation gas mixture,is vented through an elevated flare.
4.The atmospheric side incorporates labyrinth seals or segmented carbon rings, preventing process leakage to the environment and protecting the seal faces from bearing oil contamination.
5.The secondary seal gas and separation gas are isolated from the process system.
6.The rotating and stationary rings of the dry gas seal operate in non-contact mode, achieving a long service life.
7.Wide applicability and high safety .
Solution Selection:
Designed for DEREI’s GCS822 dry gas seal support system to ensure stable sealing performance. Customizable configurations available based on user-specific process requirements.