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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