Rod seal Prädifa series BS, Ultrathan® | Product Series

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Outside Diameter (mm)

Element Height (mm)

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Minimum Working Temperature (C)

Maximum Working Temperature (C)

Seal Material

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Rod seal Prädifa series BS, Ultrathan® Rod seal Prädifa series BS, Ultrathan®

Rod seal Prädifa series BS, Ultrathan®

Where to Buy

Rod seal for hydraulic cylinders, single-acting, polyurethane u-cup design with secondary sealing lip. For high-pressure applications. Robust seal profile for harshest operating conditions. ISO 5597, ISO 6020.

Technical Specifications

  • Thermal Application Type: High Temperature (< 205°C), Standard Moderate Temperature (-35 to 100°C), Low Temperature (< -35 C)
  • Pressure Rating: High Pressure (< 500 bar), Medium Pressure (< 250 bar)
  • Media: Hydraulic
  • Polymer Material Options: Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®)
  • Maximum Operating Pressure: 400 bar
  • Minimum Operating Temperature: -45 to -20 °C
  • Maximum Operating Temperature: 80 to 110 °C
  • Maximum Surface Speed: 0.5 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
Safety Warning

Full Product Description

The BS Ultrathan® rod seal is a U-ring with 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 elongated contact area and multiple sealing lips.
• Exceptionally high static and dynamic sealing performance.
• Enhanced sealing performance in non-pressurized conditions.
• Penetration of air into the system is largely prevented.
• Robust seal profile for harshest operating conditions.
• Extreme wear resistance.
• Easier installation.
• Insensitive to pressure peaks.
• Improved lubrication due to pressure medium deposit in the dynamic contact area.
• High extrusion resistance.
• Excellent media resistance in case of suitable compound selection.
• Suitable compounds available for special requirements of the chemical process industry.
• Suitable compounds available for special requirements of the food processing industry.
• Dimensions according to ISO 5597.
• Short radial assembly depth.
• Installation in closed and undercut housings.
• Further dimensions of machined series with short lead times available.

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.

The BS rod seal is available in the following compounds:
P5000 - Food applications (FDA approval)
P5001 - Bio-degradable fluids
P5008 - Industrial applications
P5009 - Low temperatures
P5010 - Light-duty
P6000 - Heavy-duty


Related Documents

Literature and Reference Materials
Hydraulic Seals--PTD3350
Compound Data Sheet TPU P5008
Installation Guidelines for Rod Seals--PTD3350
Storage and Cleaning of Elastomer Seals--PTD3032
Ultrathan® --Rod seal BS--PTD3350
Product Demos & Tutorials
How to Properly Store and Clean Elastomer Seals
Mixing the right ingredients: Material Development at Parker-Prädifa
Communities, Blogs & Industry Links
Industry Hydraulics
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Products Inside Diameter (mm) Outside Diameter (mm) Element Height (mm) Groove Width Minimum Working Temperature (C) Maximum Working Temperature (C) Seal Material
BSB025P4300 110 125 14.5 16 -30 110 P4300
BS7085P4300 70 85 11.4 12.5 -30 110 P4300
BS7787P4300 77 87 11.5 12.5 -30 110 P4300
BS9005P4300 90 105 11.4 12.5 -30 110 P4300
BSB030P5000 110 130 14.5 16 -20 100 P5000
BS1424P5000 14 24 7.3 8 -20 100 P5000
BS2030P5000 20 30 7.3 8 -20 100 P5000
BS2533P5000 25 33 6.5 7.3 -20 100 P5000
BS4008P5000 40 52 8 9 -20 100 P5000
BS4561P5000 45 60 11.4 12.5 -20 100 P5000
BS5004P5000 30 38 8 9 -35 100 P5000
BS5609P5000 56 71 11.4 12.5 -20 100 P5000
BS8095P5000 80 95 11.4 12.5 -20 100 P5000
BSA113P5001 105 113 7.3 8 -30 80 P5001
BS1424P5001 14 24 7.3 8 -30 80 P5001
BS2836P5001 28 36 7 7.5 -30 80 P5001
BS3244P5001 32 40 7.3 8 -30 80 P5001
BS4552P5001 45 53 7.3 8 -30 80 P5001
BS5203P5001 52 62 10 11 -30 80 P5001
BS6067P5001 60 68 7.3 8 -30 80 P5001
BS7583P5001 75 83 7.3 8 -30 80 P5001
BS9097P5001 90 98 7.3 8 -30 80 P5001
BSA019P5008 100 120 12 13 -35 100 P5008
BSA020P5008 100 120 14.5 16 -35 100 P5008
BSA513P5008 105 113 11.5 12.5 -35 100 P5008
BSA517P5008 105 117 9.1 10 -35 100 P5008
BSB025P5008 110 125 14.5 16 -35 100 P5008
BSB029P5008 110 130 12 13 -35 100 P5008
BSB030P5008 110 130 14.5 16 -35 100 P5008
BSC028P5008 120 128 11.5 12.5 -35 100 P5008
BSC030P5008 120 130 14 15 -35 100 P5008
BSC039P5008 120 140 12 13 -35 100 P5008
BSC233P5008 125 133 11.5 12.5 -35 100 P5008
BSC840P5008 128 140 9.1 10 -35 100 P5008
BSD045P5008 130 145 12 13 -35 100 P5008
BSE050P5008 145 153 11.5 12.5 -35 100 P5008
BSE060P5008 140 160 14.5 16 -35 100 P5008
BSF070P5008 150 170 15 16 -35 100 P5008
BSF264P5008 152 164 9.1 10 -35 100 P5008
BSG085P5008 160 185 18.2 20 -35 100 P5008
BSG704P5008 167 175 11.5 12.5 -35 100 P5008
BSG705P5008 167 176 11.5 12.5 -35 100 P5008
BSH020P5008 170 200 18 19 -35 100 P5008
BSH169P5008 177.7 195 9.73 11.3 -35 100 P5008
BSJ088P5008 180 188 11.5 12.5 -35 100 P5008
BSJ092P5008 180 192 9.1 10 -35 100 P5008
BSK003P5008 193 201 11.5 12.5 -35 100 P5008
BSL008P5008 209.55 226.77 9.73 11.3 -35 100 P5008
BSL024P5008 212 224 9.1 10 -35 100 P5008
BSL025P5008 200 225 18.2 20 -35 100 P5008
BSM050P5008 220 250 22.7 25 -35 100 P5008
BSM085P5008 228.5 246 9 10 -35 100 P5008
BSM110P5008 230 260 22.7 25 -35 100 P5008
BSN580P5008 250 280 22.7 25 -35 100 P5008
BSO005P5008 266.7 284 9.73 11.3 -35 100 P5008
BSP008P5008 280 310 18 19 -35 100 P5008
BS0816P5008 8 16 5.7 6.3 -35 100 P5008
BS0916P5008 9 16 5.7 6.3 -35 100 P5008
BS1016P5008 10 16 4.5 5.3 -35 100 P5008
BS1017P5008 10 17 5.7 6.3 -35 100 P5008
BS1018P5008 10 18 5.7 6.3 -35 100 P5008
BS1420P5008 14 20 5.7 6.3 -35 100 P5008
BS1422P5008 14 22 5.7 6.3 -35 100 P5008
BS1624P5008 16 24 5.8 6.3 -35 100 P5008
BS1626P5008 16 26 7.3 8 -35 100 P5008
BS1827P5008 18 28 7.3 8 -35 100 P5008
BS2030P5008 20 30 7.3 8 -35 100 P5008
BS2232P5008 22 32 7.3 8 -35 100 P5008
BS2533P5008 25 33 6.5 7.3 -35 100 P5008
BS2535P5008 25 35 7.3 8 -35 100 P5008
BS2605P5008 26 36 10 11 -35 100 P5008
BS2836P5008 28 36 7 7.5 -35 100 P5008
BS2838P5008 28 38 7.3 8 -35 100 P5008
BS3005P5008 30 40 10 11 -35 100 P5008
BS3030P5008 30 45 10 11 -35 100 P5008
BS3242P5008 32 42 7.3 8 -35 100 P5008
BS3243P5008 32 42 10 11 -35 100 P5008
BS3245P5008 32 45 10 11 -35 100 P5008
BS3545P5008 35 45 10 11 -35 100 P5008
BS3550P5008 35 50 10 11 -35 100 P5008
BS3646P5008 36 46 7.3 8 -35 100 P5008
BS3648P5008 36 48 8 9 -35 100 P5008
BS3649P5008 36 48 10 11 -35 100 P5008
BS3651P5008 36 51 10 11 -35 100 P5008
BS3747P5008 37 47 10 11 -35 100 P5008
BS4004P5008 40 48 11.5 12.5 -35 100 P5008
BS4005P5008 40 50 10 11 -35 100 P5008
BS4007P5008 40 55 11.4 12.5 -35 100 P5008
BS4008P5008 40 52 8 9 -35 100 P5008
BS4049P5008 40 49.52 9.6 10.5 -35 100 P5008
BS4553P5008 45 53 5.6 7.3 -35 100 P5008
BS4555P5008 45 55 7.3 8 -35 100 P5008
BS4556P5008 45 55 10 11 -35 100 P5008
BS4560P5008 45 60 10 11 -35 100 P5008
BS4561P5008 45 60 11.4 12.5 -35 100 P5008
BS4562P5008 45 60 10.5 11.5 -35 100 P5008
BS4605P5008 46 56 10 11 -35 100 P5008
BS4856P5008 48 56 11.5 12.5 -35 100 P5008
BS5004P5008 50 60 7.3 8 -35 100 P5008
BS5006P5008 50 60 10 11 -35 100 P5008
BS5064P5008 50 65 10 11 -35 100 P5008
BS5065P5008 50 65 11.4 12.5 -35 100 P5008
BS5203P5008 52 62 10 11 -35 100 P5008
BS5564P5008 55 65 10 11 -35 100 P5008
BS5567P5008 55 67 10 11 -35 100 P5008
BS5608P5008 56 71 10 11 -35 100 P5008
BS5609P5008 56 71 11.4 12.5 -35 100 P5008
BS6069P5008 60 70 7.5 8.5 -35 100 P5008
BS6070P5008 60 70 10 11 -35 100 P5008
BS6074P5008 60 75 10 11 -35 100 P5008
BS6075P5008 65 75 12 13 -35 100 P5008
BS6371P5008 63 71 8 9 -35 100 P5008
BS6377P5008 63 78 10 11 -35 100 P5008
BS6378P5008 63 78 11.4 12.5 -35 100 P5008
BS6573P5008 65 73 11.5 12.5 -35 100 P5008
BS6578P5008 65 85 11.4 12.5 -35 100 P5008
BS6805P5008 68 78 12 13 -35 100 P5008
BS7080P5008 70 80 12 13 -35 100 P5008
BS7084P5008 70 85 10 11 -35 100 P5008
BS7085P5008 70 85 11.4 12.5 -35 100 P5008
BS7588P5008 75 88 10 11 -35 100 P5008
BS7590P5008 75 90 10 11 -35 100 P5008
BS7650P5008 76.5 96.5 12 13 -35 100 P5008
BS8088P5008 80 88 11.5 12.5 -35 100 P5008
BS8090P5008 80 90 12 13 -35 100 P5008
BS8095P5008 80 95 11.4 12.5 -35 100 P5008
BS8099P5008 80 100 12 13 -35 100 P5008
BS8255P5008 82.55 95.25 9.53 10.3 -35 100 P5008
BS8504P5008 85 105 12 13 -35 100 P5008
BS8510P5008 85 100 12 13 -35 100 P5008
BS8593P5008 85 93 11.5 12.5 -35 100 P5008
BS9005P5008 90 105 11.4 12.5 -35 100 P5008
BS9010P5008 90 110 12 13 -35 100 P5008
BS9098P5008 90 98 11.5 12.5 -35 100 P5008
BS9203P5008 92 107 11.4 12.5 -35 100 P5008
BS9515P5008 95 115 12 13 -35 100 P5008
BS9705P5008 97 105 13 14 -35 100 P5008
BSA513P5009 105 113 11.5 12.5 -45 95 P5009
BSB025P5009 110 125 14.5 16 -45 95 P5009
BSK003P5009 193 201 11.5 12.5 -45 95 P5009
BS3646P5009 36 46 7.3 8 -45 95 P5009
BS4007P5009 40 55 11.4 12.5 -45 95 P5009
BS4556P5009 45 55 10 11 -45 95 P5009
BS4605P5009 46 56 10 11 -45 95 P5009
BS5004P5009 50 60 7.3 8 -45 95 P5009
BS5203P5009 52 62 10 11 -45 95 P5009
BS5609P5009 56 71 11.4 12.5 -45 95 P5009
BS7804P5009 78 86 11.5 12.5 -45 95 P5009
BS8088P5009 80 88 11.5 12.5 -45 95 P5009
BS8593P5009 85 93 11.5 12.5 -45 95 P5009
BS9005P5009 90 105 11.4 12.5 -45 95 P5009
BS1422P5010 14 22 5.7 6.3 -30 100 P5010
BS1624P5010 16 24 5.8 6.3 -30 100 P5010
BSA020P6000 100 120 14.5 16 -35 110 P6000
BSB030P6000 110 130 14.5 16 -35 110 P6000
BSG085P6000 160 185 18.2 20 -35 110 P6000
BS1420P6000 14 20 5.7 6.3 -35 110 P6000
BS1624P6000 16 24 5.8 6.3 -35 110 P6000
BS2238P6000 22 32 7.3 8 -35 110 P6000
BS2540P6000 25 33 8 9 -35 110 P6000
BS2836P6000 28 36 7 7.5 -35 110 P6000
BS2837P6000 28.575 36.512 6 6.5 -35 110 P6000
BS2838P6000 28 38 7.3 8 -35 110 P6000
BS3003P6000 30 38 8 9 -35 110 P6000
BS3244P6000 32 40 7.3 8 -35 110 P6000
BS3544P6000 35 45 8 9 -35 110 P6000
BS3545P6000 35 45 10 11 -35 110 P6000
BS3550P6000 35 50 10 11 -35 110 P6000
BS3646P6000 36 46 7.3 8 -35 110 P6000
BS3647P6000 36 46 8 9 -35 110 P6000
BS4007P6000 40 55 11.4 12.5 -35 110 P6000
BS4050P6000 40 50 8 9 -35 110 P6000
BS4250P6000 42 50 6 6.5 -35 110 P6000
BS4553P6000 45 53 5.6 7.3 -35 110 P6000
BS4554P6000 45 55 8 9 -35 110 P6000
BS4555P6000 45 55 7.3 8 -35 100 P6000
BS4561P6000 45 60 11.4 12.5 -35 110 P6000
BS5004P6000 50 60 7.3 8 -35 110 P6000
BS5005P6000 50 60 8 9 -35 110 P6000
BS5006P6000 50 60 10 11 -35 110 P6000
BS5065P6000 50 65 11.4 12.5 -35 110 P6000
BS5562P6000 55 65 7.3 8 -35 110 P6000
BS5609P6000 56 71 11.4 12.5 -35 110 P6000
BS5666P6000 56 66 10 11 -35 110 P6000
BS6074P6000 60 75 10 11 -35 110 P6000
BS6075P6000 65 75 12 13 -35 110 P6000
BS6371P6000 63 71 8 9 -35 100 P6000
BS6377P6000 63 78 10 11 -35 110 P6000
BS7080P6000 70 80 12 13 -35 110 P6000
BS7590P6000 75 90 10 11 -35 110 P6000
BS8090P6000 80 90 12 13 -35 100 P6000
BS8095P6000 80 95 11.4 12.5 -35 110 P6000
BS8510P6000 85 100 12 13 -35 110 P6000
BS9005P6000 90 105 11.4 12.5 -35 110 P6000
BS9515P6000 95 115 12 13 -35 110 P6000
BS3542P6000 35.0 43.0 6.3 7.1 -35 110 P6000
BS3544P4300 35.0 45.0 8.0 9 -30 110 P4300
BS3646P5001 36.0 46.0 7.3 8 -30 80 P5001
BS4050P4300 40.0 50.0 8.0 9 -30 110 P4300
BS5004P4300 50.0 60.0 7.3 8 -30 110 P4300
BS6070P6000 60.0 70.0 10.0 11 -35 110 P6000
BS6578P5009 65.0 85.0 11.4 12.5 -45 95 P5009
BS9705P4300 97.0 105 13.0 14 -30 110 P4300
BS6075P5001 65.0 75.0 12 13.0 -30 80 P5001
BS8095P5001 80.0 95.0 11.4 12.5 -30 80 P5001
BSC836P5008 128.0 136.0 9.1 10 -35 100 P5008
BSF252P5008 152.0 160.0 9.1 10 -35 100 P5008
BSJ080P5008 180.0 188.0 9.1 10 -35 100 P5008
BSL012P5008 212.0 220.0 9.1 10 -35 100 P5008
BS2540P4300 25.0 33.0 6:5 8.0 -30 110 P4300
BS3244P4300 32.0 40.0 6.5 7.3 -30 110 P4300
BS3848P4300 38.0 48.0 7.3 8.0 -30 110 P4300
BS3848P6000 38.0 48.0 7.3 8.0 -35 110 P6000
BS4051P5008 43.0 53.0 6.5 7.3 -35 100 P5008
BS4555P4300 45.0 55.0 6.5 7.3 -30 110 P4300
BS8593P6000 85.0 93.0 10.5 11.5 -35 110 P6000
BSA008P5008 100 108 12 13 -30 110 P5008
BSH160P5008 176 186 12 13 -35 100 P5008
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