Parker Prädifa Piston Seals B7

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The Parker Prädifa B7 Ultrathan®  piston seal is a lip seal with an interference fit. It is extremely wear-resistant, ensures reliable load holding, and is suitable for hydraulic high-pressure applications.

  • Robust seal profile for harshest operating conditions.
  • Extreme wear
  • Easier
  • Suitable for fully automatic
  • Assembly on the one-part piston is possible-
  • Insensitive to pressure
  • High extrusion resistance.
  • Excellent media resistance in case of suitable compound
  • Suitable compounds are available for special requirements of the chemical process industry.
  • Suitable compounds available for special requirements of the food processing
  • Dimensions according to ISO
  • Installation in closed and undercut
  • Additional sizes of machined products available on short

Range of application

Mainly for the sealing of pistons in heavy-duty applications in mobile and stationary hydraulics.

Operating pressure                                            ≤ 400 bar

Operating temperature                                     -35 °C to +110 °C

Sliding speed                                                      ≤ 0.5 m/s

Media                                                                   Hydraulic oils based on mineral oil

Compounds

The Ultrathan® P5008 compound is a Parker Praedifa material based on polyurethane with a hardness of approx. 93 Shore A. Its main advantages in comparison with other polyurethane materials currently available on the market are the increased heat resistance and the lower compression set.

For media containing water, we recommend our hydrolysis-resistant polyurethane compound P5001.

Installation

The seals should have an axial clearance (see columns H and L). To avoid damage at the sealing lips, the seals should not be pulled over sharp edges during installation. Normally these seals may be snapped into closed grooves. Where access is restricted special assembly tools may be required. Proposals for the design of such tools will be provided on request.

D d H L ISO1) ISO2) Order code D d H L ISO1) ISO2) Order code
15 10 4.2 4.7 B71504P5008 54 44 5.5 6.1 B75405P5008
16 8 5.7 6.3 B71608P5008 54 44 7.3 8 B75409P5008
16 10 5.7 6.3 B71610P5008 55 45 7.3 8 B75545P5008
20 12 4.2 4.7 B72011P5008 60 50 7.3 8 B76050P5008
20 12 5.7 6.3 B72012P5008 60 50 10 11 B76009P5008
22 12 8 9 B72212P5008 63 48 8.6 9.5 B76032P5008
24 16 5.7 6.3 B72416P5008 63 48 11.4 12.5 B76348P5008
25 15 7.3 8 B72015P5008 63 53 7.3 8 B76353P5008
25 17 4.5 5 B72516P5008 63 55 5.7 6.3 B76355P5008
25 17 5.7 6.3 B72517P5008 65 55 7.3 8 B76055P5008
25 18 5 5.6 B72520P5008 67 57 7.3 8 B76709P5008
27 20 7 8 B72720P5008 68 58 9.5 10.5 B76805P5008
28 20 7 8 B72810P5008 70 60 7.5 8.2 B77011P5008
32 22 7.3 8 B73222P5008 70 60 12 13 B77012P5008
32 24 5.7 6.3 B73224P5008 75 63 8.7 9.5 B77027P5008
32 25 5 5.6 B73226P5008 80 60 14.5 16 B78060P5008
34 22 8.5 9.5 B73422P5008 80 65 8.6 9.5 B78008P5008
35 25 6 6.8 B73524P5008 80 65 11.4 12.5 B78065P5008
35 25 7.3 8 B73525P5008 80 70 6.7 7.5 B78010P5008
38.1 30.1 5.7 6.3 B73810P5008 80 70 12 13 B78011P5008
39 29 7.3 8 B73909P5008 90 75 11.4 12.5 B79075P5008
40 28 10 11 B74018P5008 95 80 11.4 12.5 B79580P5008
40 30 7.3 8 B74030P5008 100 80 14.5 16 B7A080P5008
40 30 10 11 B74031P5008 100 85 11.4 12.5 B7A085P5008
40 32 5.7 6.3 B74032P5008 100 88 9.5 10.5 B7A088P5008
40 33 8 9 B74033P5008 100 90 6.7 7.5 B7A090P5008
43 33 7.3 8 B74304P5008 110 90 8 9 B7B008P5008
45 35 7.3 8 B74535P5008 110 90 15 16.5 B7B004P5008
50 35 10 11 B75010P5008 115 98 14.5 16 B7B050P5008
50 40 7.3 8 B75040P5008 120 105 11.4 12.5 B7C120P5008
50 40 10 11 B75041P5008 121 111.1 9.5 10.5 B7C050P5008
50 42 5.7 6.3 B75016P5008 125 100 18.2 20 B7C210P5008
50.8 41.17 6.2 7 B75043P5008 125 105 14.5 16 B7C215P5008
52 42 7.3 8 B75209P5008 125 110 9.6 10.6 B7C219P5008

 

D d H L ISO1) ISO2) Order code
145 115 18 20 B7E050P5008
152.4 136.5 10 11 B7F024P5008
160 135 18.2 20 B7G035P5008
160 140 14.5 16 B7G040P5008
180 150 18 20 B7J004P5008
200 170 22.7 25 B7L007P5008
200 175 18.2 20 B7L010P5008
200 185 9.6 10.6 B7L013P5008
220 200 15 16.5 B7M020P5008
240 215 15 16.5 B7N010P5008
250 220 22.7 25 B7N120P5008
250 225 18.2 20 B7N125P5008
250 230 15 16.5 B7N130P5008
310 280 22.7 25 B7Q028P5008
320 290 20 22 B7Q210P5008

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