Parker Prädifa ULTRATHAN®Piston Sealing Set KU

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The ULTRATHAN® piston sealing set profile KU can be used as a double or single acting piston seal. It consists of a polyurethane sealing element and two integrated angular guide rings which simultaneously act as anti-extrusion rings.

Advantages of the profile geometry:

  • Substantially improved sealing function by comparison with previous profiles of this type: can therefore also be used as a single actin seal.
  • KU set provides sealing and guiding.
  • Suitable for use in mineral oil up to 100 °C (max. 50 °C in HFA and HFB fluids).
  • Simple one-piece piston.
  • Developed for housings in accordance with ISO 6547/Light Series (on request can also be produced for housings not conforming with this standard).

Advantages of the material:

  • Extraordinary high abrasion resistance.
  • Unaffected by impact-type loads, e. g. lateral forces, pressure impacts.
  • High resistance to extrusion.
  • Low compression set.

Installation:

Remove all burrs and sharp edges within the seal
fitting area and thoroughly clean housing.

Standard series for housings according to ISO
6547/light series.

Field of application:

Working pressure:                 ≤ 400 bar

Working temperature:         —30 to + 100 °C

(HFA and HFB pressure
fluids up to max. 50 °C)

Surface speed:                         ≤ 0,5 m/s

Sealing set for double and single acting pistons in control, positioning, and supporting cylinders for industrial and mobile hydraulics.

Compounds:

Sealing element: Parker P5008 polyurethane with a hardness of approx. 93 Shore A. By comparison with normal commercial polyurethanes, P5008 is distinguished by its higher heat resistance, better hydrolysis behaviour and lower compression set. Angular guide rings: W5019, special filled polyamide.

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

D d L H d1 d2 a Item number 
25 17 10 18 22 24 KU 0025 00245
32 24 10 18 29 31 4 KU 0032 00245
40 32 10 18 37 39 4 KU 0040 00245
50 40 12,5 20,5 47 49 4 KU 0050 00245
63 53 12,5 20,5 60 62 4 KU 0063 00245
80 65 20 30 76 78,5 5 KU 0080 00245
100 85 20 30 96 98,5 5 KU 0100 00245
125 105 25 37,6 120 123 6,3 KU 0125 00245
140 120 25 37,6 135 138 6,3 KU 0140 00245
160 140 25 37,6 155 158 6,3 KU 0160 00245

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