Things You Should Know About Sealing Elements

Sealing components are the most important devices for current and future mechanical and industrial equipment. Seal components have two main functions. One is to prevent leakage of grease, water, and gas; the other is for dust protection.

What are seals used for?

Common uses for seals include preventing leaks from occurring where the end of the shaft comes out of the cap and sealing hydraulic lines. These types of seals are usually molded or machined products. Seals are often used in bearings, which are basically just a ball bearing surrounded by a rubber seal, which prevents it from leaking and sometimes reduces the noise generated during operation.

There are two main categories used for sealing components, dynamic and static. The difference between static and dynamic seals is as follows.

Dynamic Seals

Oil seals for rotary and reciprocating applications.

Piston and cylinder lip seals for hydraulic and pneumatic equipment

Sealing ComponentsCDType Sealing Components

Static seals

O-rings: round in cross-section, for industrial equipment and general purpose (bracelets)

Quarter rings: X-shaped in cross-section, for high-pressure and industrial equipment

Adhesive seal: rubber with metal between the bolt and nut to provide dust protection and increased locking force

Gaskets: made of many different materials and used in engines and other equipment

V-ring: similar in cross-section to V-shape, used for high pressure in hydraulic and pneumatic equipment.

How to make a good oil seal?

Three factors affect the production of oil seals.


Working pressure

Curing time

How to get useful oil seals?

You need to know the working environment.

Housing, shaft, and width dimensions

Operating temperature, pressure, and physical environment

(heat resistance, ozone resistance, chemical, etc.)

D Type Sealing Components

D Type Sealing Components

Factors to consider when using sealing elements

The following factors should be considered when deciding on the type of sealing element to be used in an application.

Application environment (Factors to be considered are environmental issues in the area as well as the application.)

Maximum operating temperature

Operating speed

Gap values

Application loads and pressures

They are typically used with water, oil, and various types of chemicals. As a result, they are constructed in such a way that they do not wear out in the constant presence of certain fluids.

Sealing elements are used in hydraulic cylinders and pistons in the construction, aerospace, and automotive industries. They can be used in both standard and specialized applications.

Sealing elements should be constructed in such a way as to ensure maximum sealing efficiency. Depending on the application, sometimes sealing elements are intended to reduce vibrations in the application. In other applications, they are expected to avoid severe part misalignment.

How are seals installed?

Seals are usually installed by using a press to fit them into the holes and then tapping them further with a hammer. Lubrication is usually required to prevent the crankshaft from damaging the seal as it passes through it.

When should I replace a seal?

When a seal is damaged, the entire bearing must be replaced, not just the seal.

Let the experts at JIANKE help you find the right seal for your project. For more information and consultation, contact us here!