2) Special seal types and their features
A patent for an oil seal was filed by Nelson Thomas Edward on August 12, 1937, and published a year later. There were two purposes described. The device was to provide an oil seal between a fixed housing and a rotating part. The seal is described as
ERIKS type R (type A according to the DIN standard) is identical in shape to type M, but has a rubber outer case with metal reinforcement on the inside. The rubber creates a good seal in the housing, even if the housing has suffered minor damage or is not in its best condition for other reasons. The RST version has a dust lip. These types are often chosen to replace a type with a metal outer case because they are easier to install and can cope with minor damage to the groove, such as scratches.
HALOGEN
The benefits of Viton include:




• Fluorine rubber
2. The most common types of oil seals are rubber-cased and metal-cased.
Engine Oil Seal, Power Steering Oil Seal, and Motor Oil Seal: Essential Components in Automotive Systems

