The rod guide ring type SF prevents metal parts from contacting each other and additionally absorbs occurring shear forces. As standard it is made of the compound PTFE + carbon or PTFE + bronze. However, other materials are also available.
Given its good media resistance, the rod guide ring can be used in several media ranging from mineral oil-based hydraulic liquids, environment-friendly hydraulic liquids and water-oil emulsions to flame-resistant hydraulic liquids.
Rod guide rings offer high temperature and media resistance and a low static pressure resistance; furthermore they show excellent gliding behavior, good emergency running properties and also a high wear resistance.