The Type 28 dry gas seals for compressors have been the standard technical solution for gas sealing in turbomachines since the 70's. Today, there are about 20,000 John Crane SGUs in service worldwide and over 200 million hours of service.
Features:
During dynamic seal operation, a sealing gap of approximately 5 µm is maintained between the seat and face, thus eliminating the risk of wear and tear
These seals completely eliminate the risk of gas contamination by seal oil or oil gas, reducing maintenance costs and the number of unscheduled shutdowns.
Cartridge-type seals in single, tandem or double back-to-back configurations are capable of sealing the widest range of gases pumped by centrifugal compressors and used in many industries (gas production, storage and transport, gas processing, oil refining, as well as chemistry and petrochemistry).
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