DGS-CS is a dry-running gas seal for centrigugal compressors. It features a single-end gas seal and a cartridge design. It supports both unidirectional and bidirectional operation.
It suits applications where the sealed gas is non-flammable and non-hazardous. Atmospheric leakage is also permitted in these applications.
The complete seal assembly consists of a front labyrinth seal, a single-end primary seal, and a separation seal. Seal gas enters between the process-side seal and the primary seal faces.
Most of the seal gas flows into the compressor. A small amount flows across the primary seal faces. The seal gas pressure decreases across the seal faces to vent pressure.
The seal leakage typically vents to the atmosphere. Labyrinth and carbon ring separation seals are optionally available.
DGS-CS can replace Burgmann DGS single seal types, John Crane Type 28 series, and Flowserve Gaspac S.
Interface Details
● A Seal GasProcess gas/External gas
● B Leakage GasVent to flare/Vent to safe location
● C Separation GasNitrogen/Instrument air, nitrogen is preferred
Applications
● Nitrogen Compressor
● Air Compressor
● Supercritical CO2 Compressor/Expander
● Multi-shaft Gear Compressor
● CO2 Compressor
