Parker Prädifa Piston Seals OK

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The Parker Prädifa profile OK  piston sealing set is primarily designed for heavy-duty hydraulic applications and is preferably used in double-acting cylinders. It is extremely robust and withstands even extreme pressure peaks.

The sealing set consists of a plastic slide ring and an elastomer energizer.

  • Extreme wear
  • Easy installation on single-part piston without assembly aids due to the split design of the sealing
  • Assembly on the one-part piston is possible
  • Insensitive to extreme pressure
  • Extremely high extrusion resistance.
  • High extrusion resistance in case of high pressures and large gaps due to the special compound properties of the seal
  • Dimensions according to ISO 7425-1.
  • Short axial assembly
  • Installation in closed and undercut
  • Additional sizes of machined products available on short

Range of application

Operating pressure                                          ≤ 800 bar

Operating temperature                                    -30 °C to +110 °C

Sliding speed                                                    ≤ 1 m/s

Compounds

Parker Praedifa Sealing ring: filled modified thermoplastic (W5019).

Expander ring: NBR-based elastomer with approx. 70 Shore A (N3571).

Installation

The installation groove must be carefully deburred and cleaned. The cylinder bore must have a leading-edge chamfer. Profile OK can be snapped into closed grooves.

D d L D1 ISO1) Order code D d L D1 ISO1) Order code
25 16 4.2 24.3 OK002500704 125 109.5 6.3 124 – OK012400701
32 21 4.2 31.3 – OK003200704 130 109 8 128.8 OK013000701
40 26.3 5.8 39.2 OK004000701 130 114.5 6.3 129 OK013100701*
40 29 4.2 39.3 – OK004000704 130 115 8 128.8 OK013200701
50 34.5 6.3 49 – OK004900701 135 114 8 133.8 OK113500701
50 36.3 5.8 49.2 OK005000701 135 119.5 6.3 134 OK013500701
50 37 8 49.2 OK005100704 140 119 8 138.8 OK014000701
50 39 4.2 49.3 OK005000704 140 125 8 138.8 OK014100701
55 44 4.2 54.3 OK005400704 145 124 8 143.8 OK014500701
60 41.7 7 59.2 OK006100704 150 129 8 148.8 OK015000701
60 49 4.2 59.3 OK006000704 150 135 8 148.8 OK015100701
63 44.7 7 62.2 OK006300701 152.4 131.5 8 151.2 OK015200701
63 47.5 6.3 62 – OK006200701 160 139 8 158.8 – OK016000701
63 52 4.2 62.2 – OK006400704 160 148 8 158.8 OK016300701
70 51.7 7 69.2 OK007000701 165 144 8 163.8 OK016500701
70 54.5 6.3 69.2 OK007200704 170 149 8 168.8 OK017000701
70 59 4.2 69.3 OK007000704 175 154 8 173.8 OK017500704
75 54 8 74.2 OK007500701 180 159 8 178.8 OK018000701
75 59.5 6.3 74 OK007600701 190 169 8 188.8 OK019000701
80 59 8 79 OK008000701 200 179 8 198.8 – OK020000701
80 64.5 6.3 79 – OK008300701 210 189 8 208.4 OK021000701
85 64 8 84 OK008500701 220 199 8 218.4 OK022000701
90 69 8 89 OK009000701 220 205 8 218.4 OK022100701
90 74.5 6.3 89 OK009100701 230 209 8 228.4 OK023000704
95 74 8 94 OK009500701 240 255 8 238.4 OK024000701
100 79 8 99 OK010000701 250 229 8 248.4 – OK025000701
100 84.5 6.3 99 – OK010100701 260 239 8 258.4 OK026000704
105 84 8 103.8 OK010500701 270 249 8 268.4 OK027000701
110 89 8 108.8 OK011000701 280 255.5 8 278.4 OK028000701
110 94.5 6.3 109 OK011100701 290 271 9.5 287.8 OK029000701
115 94 8 113.8 OK011500701 300 272 9.5 297.8 OK030000701
115 100 8 113.8 OK011600701 320 292 9.5 317.8 OK032000701
120 99 8 118.8 – OK012000701 330 302 9.5 327.8 OK033000701

 

D d L D1 ISO1) Order code
370 342 9.5 367.8 OK037000701
420 392 9.5 417.8 OK042000701
450 422 9.5 447.8 OK045100701
480 452 9.5 477.8 OK048000701

Merk

Parker

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