The sealing of bearings that have already been provided with shields or seals is done by NILOS-Rings of other dimensions so that the seal clamped into the bearing is fully encapsulated by the NILOS-Ring. NILOS-Rings are required in particular in such cases if dirt can penetrate up to the bearing or if condensation is formed.

ZAV	ZJV
A NILOS-Ring that seals the outer roller bearing ring is described as a type “ZAV”. Description:An “externally-sealing” NILOS-Ring for a single-row deep groove ball bearing 6205 with integrated shields or seals is called type “6205 ZAV”.	Preference should also be given in the design for NILOS-Rings that seal the inner roller bearing ring if  possible, these are called type “ZJV”. For preference, use the corresponding NILOS-Rings of type “ZJV”. Description: An “internally-sealing“ NILOS-Ring for a single-row deep groove ball bearing 6205 with integrated shields or seals is called type “6205 ZJV”.