Berco seal groups are a result of many years of experience associated with the production of undercarriage components. The combination of three geometries and wide dimension ranges, two versions of sealing rings and three different rubber compounds for the elastic rings, provide a complete answer for sealing applications where rotation is involved.
The different geometries are named: "LT, "LL" and "IL".

The "LT" type has a load ring with a torodal cross section and is recommended when the radial opening for the seal is limited.

The "LL" type with its rhomboidal cross section load ring has its application when the space in the axial direction is limited.

The "IL" type with inverted rings is particularly suitable for high rotation speed.

The sealing rings can be provided in standard version (coated alloy steel rings with lapped mating surfaces and surface hardness Rockwell C 65) or heavy duty version. The heavy duty version is made from special castings with high percentage of chromium and molybdenum resistant to all types of corrosion and oxidation. They are subjected to special heat treatment processes in order to achieve the highest hardness values (Rockwell C 68), optimizing, in this way, durability and wear resistance.

As far as rubber compound is concerned, three types are proposed by Berco:

-standard, suitable for a temperature range from -15°C up to 100°C (5°F up to 212°F)
-semiarctic, for temperatures ranging from -40°C up to 100°C (-40°F up to 212°F)
-arctic, in case of extreme application temperatures from -55°C up to 165°C (-67°F up to 329°F. In this case, the load rings are made out of silicone rubber.

The Berco Technical Department is always ready to assist you with any information regarding the application, installation or geometrical data for its seals and all inquiries are encouraged and welcome.