The Parker Prädifa BS Ultrathan® rod seal is a U-ring with an interference fit on the outer diameter and a secondary sealing lip. It is extremely wear-resistant, ensures reliable load holding performance, and is suitable for high-pressure hydraulic applications. The additional lip results in a larger deposit of lubrication film underneath the seal. This largely prevents dry running and higher wear and achieves longer service life. Due to its radial preloading, the secondary sealing lip reliably wipes off the liquid film even in low-pressure conditions or non-pressurized movement of the rod. For telescopic cylinders, we recommend the version with a 4-mm profile width.
- Excellent sealing performance due to the elongated contact area and multiple sealing lips.
- Exceptionally high static and dynamic sealing performance.
- Enhanced sealing performance in non-pressurized
- Penetration of air into the system is largely
- Robust seal profile for harshest operating conditions.
- Extreme wear
- Easier
- Insensitive to pressure
- Improved lubrication due to pressure medium deposit in the dynamic contact
- 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
- Short radial assembly
- Installation in closed and undercut
- Additional sizes of machined products available on short
Range of application
Mainly for sealing piston rods and plungers in heavy-duty applications in mobile and stationary hydraulics. The range of dimensions is primarily oriented to the requirements of ISO 5597 and ISO 3320 for housings and diameters.
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 compound Ultrathan® P5008 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. For gap sizes see chapter “Maximum Gap Allowance”.
| d | D | H | L | Order code | d | D | H | L | Order code | |
| 8 | 16 | 5.7 | 6.3 | BS0816P5008 | 40 | 55 | 11.4 | 12.5 | BS4007P5008 | |
| 9 | 16 | 5.7 | 6.3 | BS0916P5008 | 45 | 53 | 5.6 | 6.3 | BS4553P5008 | |
| 10 | 16 | 4.5 | 5.3 | BS1016P5008 | 45 | 55 | 7.3 | 8 | BS4555P5008 | |
| 10 | 17 | 5.7 | 6.3 | BS1017P5008 | 45 | 55 | 10 | 11 | BS4556P5008 | |
| 10 | 18 | 5.7 | 6.3 | BS1018P5008 | 45 | 57.7 | 9.6 | 10.5 | BS4557P5008 | |
| 12.7 | 19.05 | 4.5 | 5.3 | BS1270P5008 | 45 | 60 | 10.5 | 11.5 | BS4562P5008 | |
| 14 | 20 | 5.7 | 6.3 | BS1420P5008 | 45 | 60 | 11.4 | 12.5 | BS4561P5008 | |
| 14 | 22 | 5.7 | 6.3 | BS1422P5008 | 46 | 56 | 10 | 11 | BS4605P5008 | |
| 16 | 24 | 5.8 | 6.3 | BS1624P5008 | 48 | 56 | 11.5 | 12.5 | BS4856P5008 | |
| 16 | 26 | 7.3 | 8 | BS1626P5008 | 50 | 60 | 7.3 | 8 | BS5004P5008 | |
| 18 | 28 | 7.3 | 8 | BS1827P5008 | 50 | 60 | 10 | 11 | BS5006P5008 | |
| 20 | 30 | 7.3 | 8 | BS2030P5008 | 50 | 62.7 | 9.6 | 10.5 | BS5062P5008 | |
| 22 | 32 | 7.3 | 8 | BS2232P5008 | 50 | 65 | 10 | 11 | BS5064P5008 | |
| 25 | 33 | 6.5 | 7.3 | BS2533P5008 | 50 | 65 | 11.4 | 12.5 | BS5065P5008 | |
| 25 | 35 | 7.3 | 8 | BS2535P5008 | 50.8 | 63.5 | 9.5 | 10.3 | BS5085P5008 | |
| 26 | 36 | 10 | 11 | BS2605P5008 | 52 | 62 | 10 | 11 | BS5203P5008 | |
| 28 | 36 | 7 | 7.5 | BS2836P5008 | 55 | 65 | 10 | 11 | BS5564P5008 | |
| 28 | 38 | 7.3 | 8 | BS2838P5008 | 55 | 65 | 11 | 12 | BS5565P5008 | |
| 30 | 40 | 10 | 11 | BS3005P5008 | 55 | 67 | 10 | 11 | BS5567P5008 | |
| 30 | 45 | 10 | 11 | BS3030P5008 | 56 | 71 | 11.4 | 12.5 | BS5609P5008 | |
| 32 | 42 | 7.3 | 8 | BS3242P5008 | 58 | 66 | 11.5 | 12.5 | BS5866P5008 | |
| 32 | 42 | 10 | 11 | BS3243P5008 | 60 | 68 | 13 | 14 | BS6068P5008 | |
| 32 | 45 | 10 | 11 | BS3245P5008 | 60 | 70 | 7.5 | 8.5 | BS6069P5008 | |
| 35 | 45 | 10 | 11 | BS3545P5008 | 60 | 70 | 10 | 11 | BS6070P5008 | |
| 35 | 50 | 10 | 11 | BS3550P5008 | 60 | 75 | 10 | 11 | BS6074P5008 | |
| 36 | 46 | 7.3 | 8 | BS3646P5008 | 63 | 71 | 8 | 9 | BS6371P5008 | |
| 36 | 48 | 10 | 11 | BS3649P5008 | 63 | 78 | 10 | 11 | BS6377P5008 | |
| 36 | 51 | 10 | 11 | BS3651P5008 | 63 | 78 | 11.4 | 12.5 | BS6378P5008 | |
| 37 | 47 | 10 | 11 | BS3747P5008 | 65 | 73 | 11.5 | 12.5 | BS6573P5008 | |
| 40 | 48 | 11.5 | 12.5 | BS4004P5008 | 65 | 75 | 12 | 13 | BS6075P5008 | |
| 40 | 49.52 | 9.6 | 10.5 | BS4049P5008 | 65 | 85 | 11.4 | 12.5 | BS6578P5008 | |
| 40 | 50 | 10 | 11 | BS4005P5008 | 68 | 78 | 12 | 13 | BS6805P5008 | |
| 40 | 52 | 7.4 | 8 | BS5608P5008 | 70 | 80 | 12 | 13 | BS7080P5008 | |
| 40 | 52 | 8 | 9 | BS4008P5008 | 70 | 85 | 10 | 11 | BS7084P5008 |
| d | D | H | L | Order code | d | D | H | L | Order code | |
| 70 | 85 | 11.4 | 12.5 | BS7085P5008 | 130 | 145 | 12 | 13 | BSD045P5008 | |
| 74 | 82 | 11.5 | 12.5 | BS7482P5008 | 140 | 160 | 14.5 | 16 | BSE060P5008 | |
| 75 | 85 | 11.5 | 12.5 | BS7585P5008 | 143 | 151 | 13 | 14 | BSE305P5008 | |
| 75 | 88 | 10 | 11 | BS7588P5008 | 145 | 153 | 11.5 | 12.5 | BSE050P5008 | |
| 75 | 90 | 10 | 11 | BS7590P5008 | 150 | 170 | 15 | 16 | BSF070P5008 | |
| 77 | 87 | 11.5 | 12.5 | BS7787P5008 | 152 | 160 | 9.1 | 10 | BSF252P5008 | |
| 78 | 86 | 11.5 | 12.5 | BS7804P5008 | 152 | 164 | 9.1 | 10 | BSF264P5008 | |
| 80 | 88 | 11.5 | 12.5 | BS8088P5008 | 160 | 185 | 18.2 | 20 | BSG085P5008 | |
| 80 | 90 | 12 | 13 | BS8090P5008 | 167 | 175 | 11.5 | 12.5 | BSG704P5008 | |
| 80 | 95 | 11.4 | 12.5 | BS8095P5008 | 167 | 176 | 11.5 | 12.5 | BSG705P5008 | |
| 80 | 100 | 12 | 13 | BS8099P5008 | 170 | 200 | 18 | 19 | BSH020P5008 | |
| 81 | 89 | 11.5 | 12.5 | BS8150P5008 | 171 | 179 | 13 | 14 | BSH105P5008 | |
| 82.55 | 95.25 | 9.53 | 10.3 | BS8255P5008 | 176 | 186 | 12 | 13 | BSH160P5008 | |
| 85 | 93 | 11.5 | 12.5 | BS8593P5008 | 177.7 | 195 | 9.73 | 11.3 | BSH169P5008 | |
| 85 | 100 | 12 | 13 | BS8510P5008 | 180 | 188 | 9.1 | 10 | BSJ080P5008 | |
| 90 | 98 | 11.5 | 12.5 | BS9098P5008 | 180 | 188 | 11.5 | 12.5 | BSJ088P5008 | |
| 90 | 105 | 11.4 | 12.5 | BS9005P5008 | 180 | 192 | 9.1 | 10 | BSJ092P5008 | |
| 92 | 107 | 11.4 | 12.5 | BS9203P5008 | 193 | 201 | 11.5 | 12.5 | BSK003P5008 | |
| 95 | 115 | 12 | 13 | BS9515P5008 | 200 | 211 | 12 | 13 | BSL005P5008 | |
| 97 | 105 | 13 | 14 | BS9705P5008 | 200 | 225 | 18.2 | 20 | BSL025P5008 | |
| 100 | 108 | 12 | 13 | BSA008P5008 | 209.55 | 226.77 | 9.73 | 11.3 | BSL008P5008 | |
| 100 | 120 | 12 | 13 | BSA019P5008 | 212 | 220 | 9.1 | 10 | BSL012P5008 | |
| 100 | 120 | 14.5 | 16 | BSA020P5008 | 212 | 224 | 9.1 | 10 | BSL024P5008 | |
| 105 | 113 | 11.5 | 12.5 | BSA513P5008 | 220 | 228 | 11.5 | 12.5 | BSM028P5008 | |
| 105 | 117 | 9.1 | 10 | BSA517P5008 | 220 | 250 | 22.7 | 25 | BSM050P5008 | |
| 107 | 115 | 11.5 | 12.5 | BSA715P5008 | 223 | 231 | 11.5 | 12.5 | BSM060P5008 | |
| 110 | 125 | 14.5 | 16 | BSB025P5008 | 228.5 | 246 | 9 | 10 | BSM085P5008 | |
| 110 | 130 | 14.5 | 16 | BSB030P5008 | 230 | 260 | 22.7 | 25 | BSM110P5008 | |
| 118 | 126 | 13 | 14 | BSB805P5008 | 250 | 280 | 22.7 | 25 | BSN580P5008 | |
| 120 | 128 | 11.5 | 12.5 | BSC028P5008 | 266.7 | 284 | 9.73 | 11.3 | BSO005P5008 | |
| 120 | 130 | 14 | 15 | BSC030P5008 | 280 | 310 | 18 | 19 | BSP008P5008 | |
| 125 | 133 | 11.5 | 12.5 | BSC233P5008 | ||||||
| 128 | 136 | 9.1 | 10 | BSC836P5008 | ||||||
| 128 | 140 | 9.1 | 10 | BSC840P5008 |
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