Parker Prädifa Rod Seals EM

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The Parker Prädifa EM rod seal/wiper ring for pneumatic applications is a proven combination element for sealing piston rods in compact pneumatic cylinders and valve lifters. The special design using a wear-resistant Ultrathan® compound enables installation in the smallest grooves for extremely low break-away and dynamic friction.

  • Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
  • Bi-functional element: seal and wiper.
  • Extreme wear resistance.
  • Low static and dynamic friction thanks to the miniaturized design.
  • Smooth running due to optimum adjustment of the functional lips.
  • Smooth running due to the optimum lubricant-retaining sealing lip geometry.
  • Excellent media resistance in case of suitable compound selection.
  • Short axial assembly length.
  • Short radial assembly depth.
  • Installation in closed and undercut housings.
  • Low compression set.
  • The coordinated geometries of the seal and wiper lips achieve favorable friction coefficients and long service life.

Range of application

Rod seal/wiper for mini-pneumatics.

Operating pressure ≤ 16 bar
Operating temperature -30 °C to +80 °C
Sliding speed ≤ 1 m/s
Media Compressed air, both lubricated and oil-free (after greasing for fitting)


Standard: P5010, Ultrathan® (TPU) compound (≈ 90 Shore A).

For low temperatures: P5009, Ultrathan® (TPU) compound (≈ 94 Shore A). For high temperatures: V3839, FKM compound (≈ 90 Shore A).


The self-retaining Parker Praedifa rod seal/wiper profile EM is manually or automatically snapped into the installation housing while the piston rod is disassembled. Care is to be taken to prevent sharp edges from damaging the wiping and sealing lips during assembly. Initial lubrication is the prerequisite for a very long operational life.

d D H Order code
3 5.6 2.8 EM0302P5010
4 7 2.8 EM0407P5010
5 8 2.8 EM0508P5010
6 9 2.8 EM0609P5010
8 11.5 3.2 EM0811P5010
10 14 3.7 EM1014P5010
12 16.5 4 EM1214P5010
14 18.5 4 EM1418P5010
16 20.5 4 EM1620P5010
18 22.5 4 EM1822P5010
20 25 4.6 EM2025P5010
22 27 4.6 EM2227P5010
25 30 4.6 EM2530P5010
30 35.5 5 EM3035P5010
32 37.5 5 EM3237P5010
35 40.5 5 EM3505P5010
45 51 5.5 EM4505P5010
63 69.5 6 EM6306P5010




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