The Parker Prädifa rod seal profile Q3 is a compact seal consisting of a fabric reinforced “U”-ring with an integral rubber sealing part. The Parker Praedifa sealing edges at the rubber part wipe off the film of liquid on the rod surface due to their radial preload. Therefore an excellent sealing performance will be achieved, even at low pressures or in case of zero pressure movements of the rod. Higher pressures will be transferred to the fabric-reinforced “U”-ring, which due to its construction will prevent extrusion.

Field of application:

Working pressure:                   ≤ 250 bar

Working temperature:         —30 to + 100 °C

Surface speed:                          ≤ 0,5 m/s

Mainly for the sealing of plungers, piston rods, valve slides. Also suitable for valve spools and rotating oil conducts. When choosing a seal for a particular diameter, it is best to select the one with the largest possible cross-section.

Installation:

When specifying the sealing area it must be taken into consideration that the pressure can fully act upon the seal. Therefore there must be some clearance in the axial direction. To avoid damaging the sealing edges, care should be taken that the seals are not drawn over sharp edges during installation.

Compound:

NBR-based elastomers, resistant to mineral oils. are used for the rubber part as well as for the fabric-reinforced part. Special compounds are available on request.

For special requirements (pressure, temperature, speed, etc.) please contact our Consultancy Service, so that suitable materials and/or designs can be recommended.