Sealing elements have a decisive influence on the design, function and service life of hydraulic and pneumatic cylinders and systems.
This applies equally to the piston rod seals where leak tightness, resistance to wear and gap extrusion, compatibility with process media, operation in high and low temperatures, low friction, compact form and simple installation are demanded in order to meet the requirements of for a functional sealing solution.
The significance of these parameters and their limits is generally dependent on the requirements of the specific application. Trelleborg Sealing Solutions has therefore developed a complete range of seals which, due to their optimized geometries and designs and the use of high quality materials such as Zurcon® polyurethane (PU), satisfy the technical and economic demands of the fluid power industry in full.
For demanding fluid power applications, in particular hydraulic cylinders for Off-Highway machinery, Trelleborg Sealing Solutions presents the Zurcon® range of polyurethane seals.
Compact, Double-Acting Piston Seal
Zurcon®Glyd Ring®D gives the perfect combination of sealing performance and service life, through optimized contact pressure and minimized heat generated from friction. To achieve this, an innovative design that incorporates two special grooves in the D-shaped profile of the seal sustains an oil film for optimum lubrication of the seal against its counter surface.
Next Generation U-Cup Rod Seal
Due to its special design, behind the dynamic seal lip, the Zurcon® U-Cup RU9 with its structure of slide segments interspersed by back-pumping channels, features excellent back-pumping ability across the entire pressure range. The dynamic seal slide segments also have a micro-structure with excellent tribological and sealing characteristics. As well as increasing the sealing ability of the U-Cup RU9, this also ensures a constant lubrication film underneath the seal sliding surface, reducing breakaway force even after prolonged periods of rest and reduces dynamic friction force.
Double-Acting Scraper Seal with Pressure Relief
In situations when there is significant pressure build-up behind the scraper, traditional scraper designs can be pushed out of their grooves causing total sealing system failure. The Zurcon® Scraper DA24 H is a venting version where axial holes through the section operate as pressure relief ‘valves’, allowing oil to be released in the case of overpressure.
Trelleborg Sealing Solutions
Pegasus House, 1 Cranbrook Way, Solihull Business Park
Solihull, West Midlands, B90 4GT, UK
Tel: +44(0)121 744 1221
Email: tssuk@trelleborg.com
www.tss.trelleborg.com
Fluid Power & Systems, NEC, Birmingham, 12-14 April 2016, Stand AF310
