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Steam Turbine designs – LabTecta 66ST, LabTecta 66STAX
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Process steam turbines present a unique challenge for bearing protection.

As the carbon rings containing the steam wear, high temperature / high velocity steam travels down the shaft directly at the
bearing seal. Standard OEM labyrinth seals have proven to be ineffective preventing steam ingress.
AESSEAL has developed LabTecta 66 designs specifically designed for steam turbine applications. These designs feature:
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• High temperature static shaft seal
• Steam deflector / Flinger
• Aflas ‘O’ rings as standard
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• Internal shut-off valve
• Extra clearances for thermal expansion

For smaller steam turbines, the LabTecta 66ST design provides excellent protection in a compact package. For larger steam
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turbines, the LabTecta 66STAX provides easy installation with the capability to accommodate large axial shaft movement.
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Standard designs are available for common steam turbines models like the Elliott YR series. Specific designs can be
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manufactured at no additional charge.

66ST 66STAX

LabTecta 66ST LabTecta 66STAX
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The single most cost-effective upgrade to
steam-turbine reliability

Multiple refineries in the USA have upgraded steam turbines
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from the existing OEM labyrinth to the LabTecta 66ST.
The existing OEM Labyrinths allowed the steam leaking out the
carbon rings to pass through the labyrinth and contaminate the
oil. It is not uncommon to drain ‘cups’ of water from the oil in
many refinery applications. This causes extremely short bearing
life. Since installing the LabTecta 66ST these problems have
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been solved.

LabTecta 66 installed on steam turbine in a USA refinery
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(Case Ref: 3495)