The single-acting piston seal type KD 01 is primarily used in cylinders with one-sided pressurization. It promises stick-slip free running as well as good dry-running properties. These piston seals are suitable for mineral oil-based hydraulic liquids, environment-friendly bio-oils and water to flame-resistant hydraulic liquids and air.
While the PTFE profile ring seals dynamically against the cylinder surface, the elastic O-ring ensures uniform contact pressure of the PTFE profile ring onto the cylinder surface, and at the same time, a static sealing between profile ring and groove base.
Even with low pressures, the piston seal shows good sealing effect due to the inherent preloading of the PTFE profile ring and the contact force of the preloaded O-ring. At higher system pressures, the medium pressurizes the O-ring causing it to press the PTFE seal with enhanced force against the cylinder surface.
Through the different material combinations, the piston seal can be used reliably across the whole pressure, speed and temperature range.