The piston guide ring type KF 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; other materials are available.
Given its good media resistance, the piston 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.
Piston guide rings offer very good gliding behavior, good emergency running properties and also a high wear resistance. Additionally, they help to attenuate mechanical vibrations.