Hydraulic seal is a vital component in the hydraulic system. Its main function is to prevent the leakage of hydraulic oil in the system and prevent external impurities from entering the hydraulic system. This plays an irreplaceable role in ensuring the efficient, stable and safe operation of the hydraulic system.

Hydraulic seal

2. Structure and Type

Structural Features

Hydraulic seals are usually composed of sealing elements and auxiliary components. The sealing elements have precise sizes and shapes, such as the common lip seal structure. The lip design of the lip seal is very critical. It can fit tightly with the sealing surface under the pressure of the hydraulic oil to form a reliable sealing interface.

Various types

Piston seals are used to seal the piston in the hydraulic cylinder. It needs to withstand a large pressure difference and maintain good sealing performance with the reciprocating motion of the piston. Rod seals are mainly used to seal the piston rod of the hydraulic cylinder. While preventing the leakage of hydraulic oil, it also prevents external impurities such as dust and moisture from entering the system. Another type is static seals, which are used to seal between relatively static parts in the hydraulic system, such as seals at pipe joints.

3. Material properties

Rubber

Nitrile rubber (NBR) is a widely used Hydraulic seal material. It has good oil resistance, wear resistance and temperature resistance. In general hydraulic systems, it can effectively resist the erosion of hydraulic oil and ensure a long-term sealing effect.

Hydraulic seals made of polyurethane (PU) material have high strength and hardness. In high-pressure and high-speed hydraulic systems, polyurethane seals can withstand greater pressure and friction, and are not easy to deform and wear.

Polytetrafluoroethylene (PTFE)

PTFE has an extremely low friction coefficient, which can reduce energy loss in Hydraulic seals and improve the efficiency of hydraulic systems. At the same time, it also has excellent chemical stability and has strong resistance to various hydraulic oils and chemicals.

Keyword:

Hydraulic seal

As the leading designer and manufacturer of rubber parts and seals, DESIOR Rubber has a wide range of products to meet all your sealing needs. From our vast o-ring inventory of virtually any shape and size to our complex, custom sealing solutions, we have precisely what you need for any sealing application.

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