Trelleborg Sealing Solutions has launched the Stefa high-pressure radial shaft seal portfolio for demanding applications
Stefa high-pressure radial shaft seals (HPRSS) are optimised to improve sealing performance for various speed, chemical compatibility and pressure challenges. Suitable for various types of hydraulic motors and pumps, Stefa seals are proven at pressures of up to 20MP a and speeds of up to 17 metres per second (MPS). They also feature innovative engineered designs that compensate for shaft misalignment, ensuring reliable sealing under extreme conditions.
The range includes the well-established HP20 series which utilises a patented design geometry that self-balances under strong pressure with a metal retainer that prevents lip extrusion and dissipates heat, extending service life. Millions of the HP20 seals have been sold since its introduction in 2010.
Advanced R&D capabilities
Inderjeet Singh, global product line director, said, “Working closely with our customers and utilising our own advanced manufacturing, R&D and testing facilities, we have delivered a step change in performance and durability with the enhanced Stefa radial shaft sealing range. Equipment that requires high-pressure radial shaft seals is typically complex and high value, and any seal failure will be an expensive liability for the operator.
"Over several years, we have leveraged our advanced global in-house R&D capabilities to optimise geometries and materials to provide customer assurance in terms of performance and durability across a wide range of applications with differing requirements.
"Performance expectations for high pressure radial shaft seals are becoming ever-more challenging, with customers in recent years demanding solutions that work at even high speeds and accelerations. To meet the challenges, we have built advanced test rigs with wider capabilities in terms of operating parameters such as temperature, speed, torque and pressure, as well as pressure spikes and side loads.Trelleborg’s customer proximity has been critical to the successful innovations in our Stefa portfolio, leveraging our materials expertise and design capabilities alongside deep collaboration with customers to provide optimised solutions.”