Type 93AX
Coaxial Separation Seal
John Crane’s Type 93AX is a next-generation coaxial separation seal engineered to deliver exceptional performance, reliability and efficiency, in high-demand compressor applications.
Suitable for a wide range of applications in the energy and process industries, including challenging applications with high-pressure and temperature differences -25 °C ~ 180 °C. During loss of separation gas, the Type 93AX is designed to operate non-contacting for limited periods of time, until normal operation resumes. In case of a dry gas seal failure, the Type 93AX is designed to restrict process gas leakage for safer and more sustainable operation.
Find out more about the Type 93AX Coaxial Separation Seal on our overview page, including product brochure, insights, and additional resources for download.
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Features
- Separation gas (normally nitrogen or air) is injected through the stationary face into the sliding surface, forming a high stiffness film.
- Creates controlled leakage flows directed towards both inner and outer diameters of the seal.
- Optimised materials and design ensure minimal gas consumption and eliminates wear during operation.
- In the event of separation gas supply failure, the seal will maintain non-contacting operation and effectively prevent oil migration.
- Extremely low separation gas consumption.
- Consistent consumption in both static and dynamic conditions.
- Hydrostatic lift off – insensitive to slow roll operations.
- Non-contacting operation under all conditions.
- No oil ingress under any circumstances.
- Bi-directional design.
- Suitable for running with nitrogen separation gas, irrespective of dew point.
Parameters
- Size range
- 100 to 225mm/4 to 8.85 in
- Temperature
- -25°C to 180°C/-13°F to 356°F
- Speed
- Up to 145 m/s/475 fps (on inner balance diameter)
- Pressure
- Separation gas operating differential pressure range: 2.5 to 4.5 bar/36 to 65 psi
- Maximum sealing integrity: 70 bar/1015 psi
- Gases
- Nitrogen, Air
- Vibration Levels
- Compliance with API 617 and ISO7919-3
- Standards
- NACE, API 692
Recommended Applications
- Oil and Gas: Upstream (offshore), Pipelines, LNG, Downstream
- Petrochemicals
- CCUS and Hydrogen
- Power generation