DGS-T| Dry gas seal for compressor |Tandem seal

A tandem seal consists of two single seals arranged in series. Tandem seals are suitable for medium- and high-pressure applications where some leakage of process/seal gas to the atmosphere is acceptable. This configuration is used where axial space constraints do not allow the installation of an intermediate labyrinth Seal gas is injected between the process side seal and the primary seal faces. The majority of the seal gas flows into the compressor and a slight amount flows across the primary seal faces. The seal gas pressure is reduced across the primary seal to vent pressure. Primary seal leakage is reduced from vent pressure across the secondary seal to atmospheric pressure. In case of primary seal failure, the secondary seal is designed to operate at primary seal conditions, which prevents uncontroled leakage to the atmosphere and achieves a safe shutdown of the compressor. Leakage from the primary seal is routed to a vent system, and leakage from the secondary seal is typically routed to the atmosphere.

Pressure: 0~15MPA

Temperature: -40~200℃

Linear Velocity: ≤160m/s

Shaft size : 45~250mm

Medium:Process gases such as hydrogen, propane, and syngas.

The above limit application parameters are not met simultaneously, customized design for particular applications.

Metal parts: 410,304,316L,2507

Seal ring: SSiC-Carbon graphite,WC- Carbon graphite

Elastomer ring: FKM,EPDM,PTFE,FFKM

Spring: 316L,Hastelloy C

Features

Gas-lubricated

cartridge design

Uni-directional or bidirectional