Parker Prädifa Piston Sealing Set ZX

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The Parker Prädifa piston sealing set profile ZX is a double-acting piston seal. It consists of the sealing rubber element, two anti-extrusion rings, and two angular guide rings.

Advantages of these sealing sets:

  • Guiding and sealing are performed by the seal itself with very little space requirements.
  • Suitable for use in mineral oils, HFA-, HFB, and HFC-fluids (max. + 60 °C).
  • Easy installation without expensive auxiliaries.
  • Simple one-part piston design.
  • Designed for housings in accordance with ISO 6547.
  • Adaption to the working conditions and full utilization of the cylinder material by the use of either light or heavy profile series.

The application of the Parker Praedifa cylinder sealing sets is limited by the working conditions. For severe working conditions, it is not recommended to make full use of the parameters stated in the table (next page). On the other hand, it may be possible to exceed these values for lower temperature applications.

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

Field of application:

Working pressure:

Temperature                          max. perm. pressure

60 °C                                       400 bar

80 °C                                       315 bar

100 °C                                     250 bar

Working temperature:         – 30 bis + 100 °C

HFA-, HFB- and HFC- fluids to the max. 60 °C

Surface speed:                      ≤ 0,5 m/s

These parameters are valid providing that the manufacturing dimensions (including tolerance these cylinders are observed as close as possible during mechanical stress (eccentricity and bellying)  Sealing set for double-acting pistons in pressure control cylinders, supporting and operating cylinders for industrial and mobile hydraulics.

Installation:

Sharp edges and burrs within the installation area the seal must be removed. When mounting the seals, please regard the natural order of the individual elements: Start assembly with one of the angular guide rings. Care must be taken that the contact points (gaps) of the guide rings and the anti-extrusion rings are not directly in line, but that these are mounted in staggered order.

Compounds:

Rubber part: NBR-compound with a Shore hard of approx. 80 A.

Anti-extrusion rings: Poly elastomer (W5035). Angular guide rings: Filled
polyamide (W50191W5020).

Light series 
D d L H d1 d2 a Item number 
25 17 10 18 22 24 4 ZX 0025 00660
32 24 10 18 29 31 4 ZX 0032 00660
40 32 10 18 37 39 4 ZX 0040 00660
50 40 12,5 20,5 47 49 4 ZX 0050 00660
63 53 12,5 20,5 60 62 4 ZX 0063 00660
80 65 20 30 76 78,5 5 ZX 0080 00660
100 85 20 30 96 98,5 5 ZX 0100 00660
125 105 25 37,6 120 123 6,3 ZX 0125 00660
140 120 25 37,6 135 138 6,3 ZX 0140 00660
160 140 25 37,6 155 158 6,3 ZX 0160 00660
Heavy series 
D d L H d1 d2 a Item number 
25 15 12,5 20,5 22 24 4 ZX 0025 00661
32 22 12,5 20,5 29 31 4 ZX 0032 00661
40 30 12,5 20,5 37 39 4 ZX 0040 00661
50 35 20 30 46 48,5 5 ZX 0050 00661
63 48 20 30 59 61,5 5 ZX 0063 00661
80 60 25 37,6 75 78 6,3 ZX 0080 00661
100 80 25 37,6 95 98 6,3 ZX 0100 00661
125 100 32 52 119 123 10 ZX 0125 00661
140 115 32 52 134 138 10 ZX 0140 00661
160 135 32 52 154 158 10 ZX 0160 00661
180 150 36 61 172 177 12,5 ZX 0180 00661
200 170 36 61 192 197 12,5 ZX 0200 00661
250 220 36 61 242 247 12,5 ZX 0250 00661
320 290 36 61 312 317 12,5 ZX 0320 00661

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