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By preventing lubricants from escaping, they protect key components of machinery from being damaged by leaks of various fluids. Everything from car engines to assembly machines use these oil seals to remain free from any harmful interactions that can cause serious and expensive damage to any of their critical parts.
Other important factors are ensuring the hardness and roughness of the shaft are correct. A shaft hardness of HRC 45 is recommended for a rubber sealing lip, with a roughness of Ra 0.4-0.8. A higher shaft hardness of HRC 60 and shaft roughness of Ra 0.1-0.4 is recommended for a PTFE lip.
Figure 1: Types of sealing devices
- Another important feature of rubber flange gaskets is their chemical resistance. They can withstand exposure to a wide range of chemicals, including acids, bases, and solvents, making them suitable for use in harsh environments. This property is particularly useful in industries such as chemical processing, where exposure to corrosive substances is common.