FEY Labyrinth Sealing Rings

Protect components in dirty and abrasive environments up to 700oC


General Information for Greasing

Greased laminar rings provide a better seal arrangement than dry running rings, greased laminar rings are required when the application is subject to splash water, dirt and scale. In order to allow sufficient transfer of grease throughout arrangement and prevent over pressure during application, it is recommended that grease application bores and grease relief bores are provided. Where possible the ring carrier should be supplied by 4 off 3 to 5 mm diameter bores equally distributed around the circumference and also into the groove base, this will allow easy application and exchange of grease during re-lubrication.

Greasing options

Listed below are three different and proven greasing options with greasing bores or grease relief bores, which can be arranged depending on the available space. Leakes from the outside are not possible because the bores are filled with grease.

Lubrication recommendation

We cannot make any recommendations for the selection of the lubricant or provide information about the greasing frequency. The type and quantity of an appropriate lubricant must be determined and specified by the customer depending on the operating conditions such as speed, operating temperatures, contamination level and ambient conditions. Bearing and lubricant manufacturers may be able to provide information. 


The "FK5-HFL" ring types are the exception with respect to greasing. They must be installed dry and without any additional lubricants. The surrounding components, which come in contact with the laminar rings must also not be greased. The lubricants carbonize due to the high operating temperatures and the laminar rings will fail.