In the aerospace industry, various types of seals are used to ensure the integrity and functionality of aircraft systems. Here are some common types of seals used in aerospace applications:

 

Aerospace O-Rings

O-rings are one of the most widely used types of seals in aerospace. They are circular elastomeric rings with a round cross-section. O-rings are typically made of materials such as rubber or synthetic elastomers and are used to create a leak-proof seal between two mating surfaces. They are commonly employed in hydraulic systems, fuel systems, and engine components.

 

 Gaskets

Gaskets are flat seals made of flexible materials such as rubber, cork, or metal. They are used to create a static seal between two surfaces, preventing the leakage of fluids or gases. Gaskets are commonly used in aircraft engine compartments, exhaust systems, and other areas where a reliable seal is required.

 

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Lip Seals

Lip seals, also known as oil seals or shaft seals, are used to prevent the leakage of fluids along rotating shafts. They consist of a metal or plastic case with a flexible lip made of rubber or other elastomeric materials. Lip seals are commonly found in aircraft engines, gearboxes, and hydraulic systems.

 

Face Seals

Face seals, also known as mechanical face seals or floating seals, are used in applications where high pressures and temperatures are present. They consist of two metal rings with precision ground faces that come into contact to form a seal. Face seals are commonly used in aircraft engines, landing gear systems, and hydraulic actuators.

 

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Labyrinth Seals

Labyrinth seals are used to control the leakage of fluids or gases in rotating or reciprocating shafts. They consist of a series of interlocking fins or teeth that create a tortuous path for the fluid or gas to flow through, reducing leakage. Labyrinth seals are commonly used in turbine engines, compressors, and gearboxes.

 

Diaphragm Seals

Diaphragm seals are flexible membranes made of elastomeric or metallic materials. They are used to separate two mediums, such as fluids or gases, while allowing for pressure equalization. Diaphragm seals are commonly found in pressure sensors, hydraulic systems, and control valves.

 

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Bonded Seals

Bonded seals, also known as Dowty seals or washer seals, are used to create a reliable seal between a bolt or screw and a mating surface. They consist of a metal washer with a rubber or elastomeric insert bonded to the inner diameter. Bonded seals are commonly used in aircraft hydraulic systems and fuel systems.

 

These are just a few examples of the types of seals used in aerospace applications. Each type of seal has its specific design and material considerations to meet the requirements of the particular aerospace system it is used in.