Piston seals with polyurethane slide rings

Piston seals with thermoplastic polyurethane (TPU) slide rings have a nitrile rubber (NBR) energizer. The wear-resistant slide ring has a profiled dynamic sealing surface. Its geometry is optimized to reduce friction and resist gap extrusion. Notches in the slide ring edges ensure rapid pressurization of the seal to react to abrupt changes in pressure. These profiles can usually be installed without special equipment and are resistant to damage during installation and cylinder assembly.

MPV profiles

MPV profiles (fig. 1) have slide rings made of X-ECOPUR PS (TPU) developed for pressures up to 400 bar (5 800 psi). They are suitable for high fluid temperatures and in medium to heavy duty applications, such as earthmoving equipment. MPV profiles are available in metric sizes (→ Size list [pdf]) and some fit seal housings in accordance with ISO 7425-1:1988. For additional information, refer to MPV profile data.

DPV profiles

DPV profiles (fig. 2) have slide rings made of X-ECOPUR PS (TPU) developed for pressures up to 400 bar (5 800 psi). They are suitable for high fluid temperatures and for medium to heavy duty applications such as earthmoving equipment. DPV profiles are available in inch sizes (→ Size list [pdf]) where O-ring dash-number housings are used. For additional information, refer to DPV profile data.

LPV profiles

LPV profiles (fig. 3) have a polyether-based polyurethane (EU) slide ring that provides resistance to hydrolysis (attack from moisture) and good low temperature flexibility. The O-ring energizer provides a cost-effective sealing solution. These profiles are developed for pressures up to 250 bar (3 625 psi) and suitable for light to medium duty applications, such as agriculture and material handling applications. They are available in metric sizes (→ Size list [pdf]) and some fit seal housings in accordance with ISO 7425-1:1988. For additional information, refer to LPV profile data.

CPV profiles

CPV profiles (fig. 4) have a polyester-based polyurethane (AU) slide ring. These profiles are developed for pressures up to 345 bar (5 000 psi) and suitable for light to medium duty applications. They are available in inch sizes (→ Size list [pdf]) where O-ring dash-number housings are used. For additional information, refer to CPV profile data.
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