Pusher type rotating seal with a PTFE wedge sealing on the shaft.
This PTFE wedge retains the sealed fluid and follows the seal movement to compensate for shaft run-out and end play. This extremely effective seal designed to meet API standard and featuring multiple spring action, is suitable for a wide range of applications, particularly in refineries and petrolchemicals process plants.
It is available in both metric EN 12756-L1K and imperial (inch) sizes.
Style 558 uses an elastomeric O-Ring instead of a PTFE wedge.
Available upon request in balanced configuration 558B - 559B.