Parker Prädifa Wiper AD

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The double Prädifa wiper AD in the Slipper Seal® design consists of a PTFE sliding ring, which takes over the wiping function, and an elastomer O-ring as a pretensioning element. It combines two functions: wiping off dirt from the outside and a sealing function that reduces the residual oil film. The AD scraper is characterized by low breakaway and sliding friction and can therefore also be used with insufficient lubrication.

Due to the combination of materials of the slide ring (PTFE) and O-ring (elastomer), this product is suitable for a variety of applications, especially for aggressive media and/or high temperatures. Depending on the individual application profile, several compounds can alternatively be selected.

Scraper rings have the function of protecting the axially movable rods and pistons from the ingress of dust, dirt, grains of sand, and metal chips. This protects the guide elements and seals and extends the life of the sealing system.

  • Excellent wear resistance.
  • Minimal break-away and dynamic friction and no stick-slip tendency to ensure uniform motion even at low speeds.
  • Good energy efficiency due to low friction.
  • High-temperature resistance assured by suitable O-ring compound selection.
  • Adaptable to nearly all media thanks to the high chemical resistance of the sealing ring and large O-ring compound selection.
  • Dimensions according to DIN ISO 6195, Type C or Type D.
  • Available in diameters from 4 to 4500
  • Installation in closed and undercut holdings.

Range of application

The AD Parker Praedifa product series is suitable for a wide range of applications, especially for aggressive media and/or high temperatures.

Operating temperature                                    -30 °C to +100 °C 1)

with FKM O-ring                                            -30 °C to +200 °C

Sliding speed                                                    ≤ 4 m/s

1) With deviation from the standard temperature range, please contact our consultancy service for the adequate O-ring compound.

Compounds

Wiper ring: Polon® 052, modified PTFE with 40 % bronze. O-ring: N0674, NBR elastomer with approx. 70 Shore A.

Size Ø d (mm) Groove     Ø D (mm) Groove     Ø D1 (mm) L (mm)
40 4 8.80 5.50 3.70
50 5 9.80 6.50 3.70
70 7 11.80 8.50 3.70
80 8 12.80 9.50 3.70
100 10 14.80 11.50 3.70
120 12 18.80 13.50 5
140 14 20.80 15.50 5
150 15 21.80 16.50 5
160 16 22.80 17.50 5
180 18 24.80 19.50 5
200 20 26.80 21.50 5
240 24 30.80 25.50 5
250 25 31.80 26.50 5
260 26 32.80 27.50 5
280 28 34.80 29.50 5
300 30 36.80 31.50 5
320 32 38.80 33.50 5
350 35 41.80 36.50 5
370 37 43.80 38.50 5
380 38 44.80 39.50 5
400 40 46.80 41.50 5
420 42 48.80 43.50 5
450 45 51.80 46.50 5
480 48 54.80 49.50 5
500 50 56.80 51.50 5
520 52 58.80 53.50 5
550 55 61.80 56.50 5
580 58 64.80 59.50 5
600 60 66.80 61.50 5
650 65 73.80 67 6

 

Size Ø d (mm) Groove     Ø D (mm) Groove     Ø D1 (mm) L (mm)
700 70 78.80 72 6
750 75 83.80 77 6
800 80 88.80 82 6
850 85 93.80 87 6
900 90 98.80 92 6
950 95 103.80 97 6
1000 100 108.80 102 6
1100 110 118.80 112 6
1200 120 128.80 122 6
1250 125 133.80 127 6
1300 130 138.80 132 6
1400 140 148.80 142 6
1500 150 158.80 152 6
1550 155 163.80 157 6
1600 160 168.80 162 6
1700 170 178.80 172 6
1750 175 183.80 177 6
1800 180 188.80 182 6
1850 185 193.80 187 6
1900 190 198.80 192 6
1950 195 203.80 197 6
2000 200 208.80 202 6
2100 210 218.80 212 6
2200 220 228.80 222 6
2250 225 233.80 227 6
2300 230 238.80 232 6
2400 240 248.80 242 6
2500 250 258.80 252 6
2600 260 272.20 262 8.40
2700 270 282.20 272 8.40

 

Size Ø d (mm) Groove     Ø D (mm) Groove     Ø D1 (mm) L (mm)
2800 280 292.20 282 8.40
2900 290 302.20 292 8.40
3000 300 312.20 302 8.40
3100 310 322.20 312 8.40
3200 320 332.20 322 8.40
3300 330 342.20 332 8.40
3400 340 352.20 342 8.40
3500 350 362.20 352 8.40
3600 360 372.20 362 8.40
3700 370 382.20 372 8.40
3800 380 392.20 382 8.40
3900 390 402.20 392 8.40
4000 400 412.20 402 8.40
4100 410 422.20 412 8.40
4200 420 432.20 422.50 8.40
4300 430 446 432.50 11
4400 440 456 442.50 11
4500 450 466 452.50 11
4600 460 476 462.50 11
4700 470 486 472.50 11
4800 480 496 482.50 11
4900 490 506 492.50 11
5000 500 516 502.50 11

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