Parker Prädifa Wiper AF

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The wear-resistant Ultrathan® Prädifa AF wiper ring serves to prevent the ingress of dust, dirt, sand, and swarf into the hydraulic cylinder. This reduces the risk of scoring on the piston rod caused by external contamination embedded in the guidance. The good wiping effect is achieved by the special design of the wiper lip.

The proven Parker Praedifa P5008 polyurethane compound stands for abrasion resistance, minor permanent deformation, and robustness against external mechanical impact. The wiper is securely held in place in the axially open groove via press-fit of the metal jacket vis-à-vis the inner groove diameter. As the wiper lip is flush with the cylinder head it is largely protected against external mechanical damage.

  • Robust seal profile for harshest operating conditions.
  • Extreme wear resistance
  • Suitable for fully automatic installation
  • Dimensions according to DIN ISO 6195, Type B
  • Simple fabrication of the housing

Range of application

Hydraulic cylinders and valve tappets

Operating temperature                                    -35 °C to +100 °C

Sliding speed                                                    ≤ 2 m/s

Compounds

Standard material of the elastomer part is Ultrathan® P5008, a polyurethane-based Parker compound with a hardness of approx. 93 Shore A. In comparison with other polyurethane materials currently available on the market, it excels because of its increased heat and wears resistance.

Installation

The profile AF Ultrathan® wiper rings are manufactured with a slightly oversized outer diameter D, thus ensuring a secure press-fit in the groove DH8 after installation. Any contact of the wiper lip with piston rod eyes or other connecting parts should be avoided.

d D L a Order code d D L a Order code
20 30 7 1 AF2030Z5071* 90 100 7 1 AF9020Z5071
25 35 7 1 AF2535Z5071* 90 104 8 1.5 AF9033Z5071
30 40 6 1 AF3040Z5071 90 105 6 1 AF9030Z5071
36 48 6 1 AF3648Z5071 90 110 10 2 AF9037Z5071
40 50 7 1 AF4050Z5071* 95 109 8 1.5 AF9505Z5071
40 52 6 1 AF4052Z5071 100 115 7 1 AFA016Z5071
45 55 7 1 AF4555Z5071* 100 115 9 1.5 AFA015Z5071*
45 60 7.5 1 AF4560Z5071 100 120 10 2 AFA021Z5071
50 60 7 1 AF5060Z5071* 101.6 114 8 1.5 AFA024Z5071
50 65 7.5 1 AF5064Z5071 110 125 9 1.5 AFB025Z5071
56 70 7.5 1 AF5656Z5071 110 126 9 1.5 AFB009Z5071
57.15 69.96 7.92 1.5 AF5715Z5071 110 130 10 2 AFB011Z5071
60 70 7 1 AF6005Z5071 120 140 8 1.5 AFC023Z5071
60 74 8 1.5 AF6008Z5107 120 140 10 2 AFC024Z5071
60 75 0.7 AF6028Z5071 125 140 9 2 AFC514Z5071*
63 73 7 1 AF6375Z5071
63 78 7.5 1 AF6378Z5071
65 79 8 1.5 AF6505Z5071
65 80 5 0.7 AF6509Z5071
69.85 95.4 12.7 2 AF6908Z5071*
70 80 7 1 AF7005Z5071
70 84 8 1.5 AF7016Z5071
70 85 7.5 1 AF7085Z5071
71 86 5 0.7 AF7110Z5071
75 89 8 1.5 AF7537Z5071
75 90 5 0.7 AF7590Z5071
76.5 96.5 10 2 AF7696Z5071*
80 90 7 1 AF8090Z5071*
80 94 8 1.5 AF8013Z5071
80 95 5 0.7 AF8005Z5071
80 100 10 2 AF8021Z5071
82.55 108.08 12.7 2 AF8205Z5071*
85 99 8 1.5 AF8509Z5071
85 105 10 2 AF8515Z5071*

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