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The difference between the PD skeleton oil seal and ...

Author:

Molly
Nov. 04, 2024
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Tags: Agriculture

Understanding the Differences Between PD and TC Skeleton Oil Seals

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Julu county demeirui mechanical seal factory


PD oil seals are distinct from TC oil seals. The differences lie in the models indicated by their respective codes, which helps us differentiate between them.

Both the skeleton and spring of these oil seals are constructed from metal, while the primary sealing lip is made of rubber. Depending on the application environment, different types of rubber can be utilized to achieve the necessary sealing performance. Nitrile rubber (NBR) is the most commonly employed rubber due to its oil resistance, thus making it a popular choice for seals and O-rings. Other common materials for oil seals include polypropylene, silicone, fluorine rubber, and polytetrafluoroethylene.

TC oil seals refer to a specific type of double lip oil seal that features a rubber covering complemented by a self-tightening spring. Typically, the term oil seal refers to the TC skeleton oil seal.

The designation "PD" in front of oil seals typically indicates general manufacturer classifications. It is often represented by abbreviations denoting various specifications, such as: W (no spring type), PD (low-speed standard type), PG (high-speed standard type), SD (low-speed double-lip), DG (high-speed double-lip), and so on. Oil seal specifications are generally illustrated as dxDxH (inner diameter X outer diameter X height) in millimeters.




Exploring TC / SC Series Auto Oil Seals

TC / SC Series Auto Oil Seals

What are TC oil seals and SC oil seals? How can ASA TC and SC types oil seal apply in the industry?

ASA TC oil seals are characterized by a shaft seal comprising a single metal cage encased in rubber, featuring a primary sealing lip equipped with an integrated spring and an additional anti-pollution sealing lip. The benefits include effective static sealing, thermal expansion compensation, accommodating greater roughness in the housing, and reduced risk of corrosion.

Conversely, the ASA SC oil seal is designed with a single lip skeleton, where the inner shell has been enhanced to improve the seal's rigidity. It is particularly well-suited for larger oil seals that require back fitting for sealing purposes, featuring a sealing lip, a spring, and a low coefficient of friction.

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