Aerospace Seals for Industrial Turbomachinery
O-Ring Face Seals
The O-ring TFE face seal is designed for applications in which heat and size requirements demand special engineering and manufacturing expertise to produce a high quality, positive face seal. They are used for sealing gases and oils where the temperature range exceeds that for an elastomeric secondary seal. Typical uses are for gas turbines in airplanes, helicopters, missiles, space vehicles and ground support equipment.
Teflon® Face Seals
The Metal Bellows Seal is designed for use in extreme temperatures and in chemical applications where elastomers are not practical. They are ideal for high temperature fuels, oils and gases, and for extremely low temperatures such as liquid oxygen refrigeration systems.
Shallow Hydropads Seals
Patented and production proven technology capable of eliminating oil leakage and extending seal MTBF.
• Non-Contacting: Creates and maintains a lubricating film (cushion of air) that the seal face rides on.
• Virtually Zero Leakage: High pressure “air barrier” eliminates oil leakage across the sealing interface.
• Reduced Heat Generation: By as much as 80%-90% over conventional seal designs.
• Extended Seal Life: Non-contacting mode results in very low wear and dramatically increases seal life.
Split Housing Seals
These seals are designed in separate halves to facilitate seal replacement on equipment where excessive downtime could seriously disrupt plant operations.
• Housing is joined with screws for quick and easy installation.
• No need to remove the shaft or impeller to service the seal.
• Air injection through buffer ports allows for complete separation of two media.
• Carbon rings are honed by the shaft to the exact fit for low leakage.
• Low leakage level is maintained through the action of circumferential springs,
which cause the carbon segments to follow the shaft movement.
Controlled Gap Seals
Floating labyrinth or controlled gap seals are used for sealing cryogens or hot gases from bearings and other mechanisms used in gas turbines, interstage compressors, refrigeration compressors, aircraft cabin compressors, jet engines, superchargers and missiles. Compact construction simplifies installation in those applications where space is limited.
Theory of Operation - The carbon insert is encased in a metal retaining band. The assembly of these two parts is designed to match the thermal and centrifugal growth of the shaft or sleeve that is to be sealed. Consequently, as the temperature rises, the floating carbon ring assembly, commonly referred to as the labyrinth ring assembly, grows at a rate similar to that of the shaft or sleeve.
Multiple Ring Segmented Seals are designed with segmented rings, to operate in contact with the shaft throughout the life of the seal. Since no elastomers are used, the Type-6 allows for an exceptionally wide range of temperatures, from cryogenic of -400 °F to as hot as 1600 °F.
Segmented seals are used for sealing cryogens or hot gases from bearings and other mechanisms in gas turbines, interstage compressors, refrigeration compressors, aircraft cabin compressors, missiles, jet engines and superchargers. Compact construction simplifies installation in applications where space is limited. The Type-6 seal is recommended where lower leakage rates are desirable and contact with the shaft is acceptable.
Custom-engineered, advanced-material brush seal capable of reducing oil and energy consumption, and reducing emissions in tough environments.
• Multi-application Use: Bi-directional design can replace for metal labyrinths, carbon ring seals
and metallic brushes.
• Rugged Design: Durable construction resists handling damage and is compatible with
high speed and high temperature environments.
• Reduced Leakage: By as much as 85% over metal labyrinth designs. Limits oil leakage at low
• Reliable Performance: Low wear materials yield consistent flows/barrier consumption
throughout the operating life cycle.
Industrial process pumps and compressors, as well as air compressors in which the pressure differential does not exceed 200 psi.
Engine & APU
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