Symmetrical Rod and Piston Seal Prädifa series BA, Ultrathan® | Product Series

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Outside Diameter (mm)

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Maximum Working Temperature (C)

Seal Material

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Symmetrical Rod and Piston Seal Prädifa series BA, Ultrathan® Symmetrical Rod and Piston Seal Prädifa series BA, Ultrathan®

Symmetrical Rod and Piston Seal Prädifa series BA, Ultrathan®

Where to Buy

Rod seal for hydraulic cylinders, single-acting, polyurethane compact PARK-O-PAK® design. For high-pressure applications. Robust seal profile for harsh operating conditions.

Technical Specifications

  • Inside Diameter: 3 to 980 mm
  • Outside Diameter: 8.5 to 1005 mm
  • Thermal Application Type: Expanded Low and High Temperature (< -35 to 140°C), High Temperature (< 205°C), Low Temperature (< -35 C), Standard Moderate Temperature (-35 to 100°C)
  • Pressure Rating: High Pressure (< 500 bar), Low Pressure (< 160 bar)
  • Media: Hydraulic
  • Polymer Material Options: Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®), Thermoplastic Copolyester Elastomer (TPC, TPE), Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM), Ethylene Propylene Rubber (EPM, EPR, EPDM)
  • Maximum Operating Pressure: 350 bar
  • Minimum Operating Temperature: -50 to -20 °C
  • Maximum Operating Temperature: 80 to 200 °C
  • Maximum Surface Speed: 0.5 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
Safety Warning

Full Product Description

The PARK-O-PAK® rod seal BA made of wear-resistant Ultrathan® is a compact seal design for hydraulic applications. Due to its symmetric design, the seal can also be used as a piston seal.
The O-ring guarantees the pre-loading of the seal lips, even under low pressures or vacuum. Due to the good setting behavior of the elastomer O-ring, this pre-loading is largely constant. As system pressure increases, compression of the sealing edges rises due to the pressure-dependent deformation of the seal profile.

There are three variants of the PARK-O-PAK® product series. The product series BA is suitable for standard grooves, e.g. according to ISO 5597. The product series SA is suitable for axially short compact designs. The product series TA is suitable for radially slim designs, e.g. for telescopic cylinders.


• Robust seal profile for harshest operating conditions.
• Extreme wear resistance.
• Easier installation.
• Insensitive to pressure peaks.
• 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.
• Installation in closed and undercut housings.
• Low compression set.
• Further dimensions of machined series with short lead times available.

Range of application:
Mainly for the sealing of piston rods and plungers in heavy duty applications in mobile and stationary hydraulics.

The BA rod seal is available in the following compounds:
00030 - Industrial applications
00020 - Light-duty
00043 - Low temperatures
00064 - Heavy-duty

Related Documents

Literature and Reference Materials
Installation Guidelines for Piston Seals--PTD3350
Installation Guidelines for Rod Seals--PTD3350
Storage and Cleaning of Elastomer Seals--PTD3032
Product Demos & Tutorials
How to Properly Store and Clean Elastomer Seals
Mixing the right ingredients: Material Development at Parker-Prädifa
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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
BA002500030 3 8.5 4 4.5 -30 80 P5004
BA002700070 3.18 9.53 6.3 6.900 -20 100 W5035
BA004400030 4.8 11.1 6.4 7 -30 80 P5004
BA005200030 6 14 5.7 6.3 -30 80 P5004
BA005700030 6.4 12.7 6.4 7 -30 80 P5004
BA006800030 7.9 14.3 6.4 7 -30 80 P5004
BA007300030 8 16 5.7 6.3 -30 80 P5004
BA100300030 10 18 5.7 6.3 -30 80 P5004
BA100300070 10 18 5.7 6.3 -20 100 W5035
BA100300240 10 18 5.7 6.3 -35 100 W5035
BA101500030 11.1 17.5 6.4 7 -30 80 P5004
BA102300030 12 20 5.7 6.3 -30 80 P5004
BA102700030 12 22 7.3 8 -30 80 P5004
BA902700100 12 22 5 5.5 -40 100 W5035
BA103100060 12.7 19.05 4.5 5 -35 100 W5032
BA105300030 13 20 5 5.5 -30 80 P5004
BA106800030 14 22 5.7 6.3 -30 80 P5004
BA107300030 14 24 7.3 8 -30 80 P5004
BA107600250 14 24 7.5 8.5 -20 200 V0747
BA108000030 14.3 20.6 6.4 7 -30 80 P5004
BA108700030 15 23 5.7 6.3 -30 80 P5004
BA111100030 16 22.2 4.5 5 -30 80 P5004
BA111500030 16 24 5.7 6.3 -30 80 P5004
BA111900030 16 26 7.3 8 -30 80 P5004
BA115000030 18 24 5 5.5 -30 80 P5004
BA115600030 18 26 5.7 6.3 -30 80 P5004
BA118600030 19.1 25.4 6.4 7 -30 80 P5004
BAM01800030 220 240 15 16.5 -30 80 P5004
BAN01800030 240 260 14.5 16 -30 80 P5004
BAN08200030 250 280 22.7 25 -30 80 P5004
BAO01500030 260.4 279.4 12.7 14 -30 80 P5004
BAO29800030 279.4 304.8 19.1 21 -30 80 P5004
BAP01600030 280 310 22.7 25 -30 80 P5004
BAP19600030 290 320 22.5 25 -30 80 P5004
BAQ12600030 311.2 342.9 25.4 28 -30 80 P5004
BAQ19000030 317.5 342.9 19.1 21 -30 80 P5004
BAQ38500030 360 385 20 22 -30 80 P5004
BAT02500010 700 725 20 22 -35 100 P5001
BA700600030 70 80 11.4 12.5 -30 80 P5004
BA701300030 70 82 8.7 9.6 -30 80 P5004
BA701700030 70 82 9.5 10.5 -30 80 P5004
BA702600030 70 85 9.5 10.5 -30 80 P5004
BA702800030 70 85 11.4 12.5 -30 80 P5004
BA705400030 70 90 12 13 -30 80 P5004
BA705900030 70 90 14.5 16 -30 80 P5004
BA707300030 73 82.6 6.8 7.5 -30 80 P5004
BA708200030 73 85.7 9.5 10.5 -30 80 P5004
BA712100030 75 85 10.5 11.600 -30 80 P5004
BA713200030 75 90 11.4 12.5 -30 80 P5004
BA716200030 76.2 85.7 7.9 8.700 -30 80 P5004
BA717600030 76.2 92.1 9.5 10.5 -30 80 P5004
BA800700030 80 88 6.5 7.2 -30 80 P5004
BA801000030 80 90 10 11 -30 80 P5004
BA801400030 80 90 11.4 12.5 -30 80 P5004
BA802200030 80 92 9 9.9 -30 80 P5004
BA803400030 80 95 11.4 12.5 -30 80 P5004
BA805100030 80 100 12 13 -30 80 P5004
BA810500030 82.6 101.6 12.7 14 -30 80 P5004
BA815600030 85 95 9.5 10.5 -30 80 P5004
BA816300030 85 100 9.5 10.5 -30 80 P5004
BA816700030 85 100 12 13 -30 80 P5004
BA816700042 85 100 12 13 -35 100 P5008
BA821800030 88.5 108.5 15 16.5 -30 80 P5004
BA200500030 20 28 5.5 6 -30 80 P5004
BA200900030 20 28 5.7 6.3 -30 80 P5004
BA201200030 20 28 6.5 7.2 -30 80 P5004
BA201900030 20 30 7.3 8 -30 80 P5004
BA203200030 20 32.7 9.5 10.5 -30 80 P5004
BA207600030 22 30 5.7 6.3 -30 80 P5004
BA208700030 22 32 7.3 8 -30 80 P5004
BA214200030 24 30 5 5.5 -30 80 P5004
BA215100030 24 32 7 7.7 -30 80 P5004
BA216900030 25 33 5.7 6.3 -30 80 P5004
BA218200030 25 35 7 7.7 -30 80 P5004
BA218600030 25 35 7.3 8 -30 80 P5004
BA219200030 25 40 10 11 -30 80 P5004
BA221600030 25.4 31.8 4.5 5 -30 80 P5004
BA221600575 25.4 31.8 4.5 5 -30 105 P5030
BA226200030 28 35 6.5 7.2 -30 80 P5004
BA226800030 28 36 5.7 6.3 -30 80 P5004
BA227300030 28 38 7.3 8 -30 80 P5004
BA227500042 28 43 11.4 12.5 -35 100 P5008
BA229800030 28.6 41.3 9.5 10.5 -30 80 P5004
BA300400030 30 38 5.7 6.3 -30 80 P5004
BA300800030 30 38 7 7.7 -30 80 P5004
BA301200030 30 40 7 7.7 -30 80 P5004
BA301600030 30 40 7.5 8.5 -30 80 P5004
BA302300030 30 42 10 11 -30 80 P5004
BA302300042 30 42 10 11 -35 100 P5008
BA301600120 30 40 7.5 8.5 -50 150 E0540
BA305800030 31.8 38.1 4.5 5 -30 80 P5004
BA823300030 88.9 101.6 9.5 10.5 -30 80 P5004
BA825400030 88.9 108 15.9 17.5 -30 80 P5004
BA900500030 90 100 6.5 7.2 -30 80 P5004
BA900600030 90 100 11.4 12.5 -30 80 P5004
BA902700030 90 105 11.4 12.5 -30 80 P5004
BA907100030 90 110 12 13 -30 80 P5004
BA907800030 90 110 14.5 16 -30 80 P5004
BA914900030 94 108.5 12.7 14 -30 80 P5004
BA916500030 95 105 11.4 12.5 -30 80 P5004
BA917800030 95 110 11.4 12.5 -30 80 P5004
BA917800042 95 110 11.4 12.5 -35 100 P5008
BA944200030 98.4 123.8 19.1 21 -30 80 P5004
BAA00700030 100 107 4.5 5 -30 80 P5004
BAA01500030 100 108 6.5 7.2 -30 80 P5004
BAA03700030 100 110 11.4 12.5 -30 80 P5004
BAA04300030 100 112.5 12 13 -30 80 P5004
BAA05700030 100 115 11 12.1 -30 80 P5004
BAA05800030 100 115 12 13 -30 80 P5004
BAA07800030 100 120 12 13 -30 80 P5004
BAA09600030 100 120 14.5 16 -30 80 P5004
BAA16000030 101.6 114.3 9.5 10.5 -30 80 P5004
BAA27200030 105 115 10 11 -30 80 P5004
BAA28400030 105 120 11.4 12.5 -30 80 P5004
BAA32000030 105 125 14.5 16 -30 80 P5004
BAA37100030 108 120.7 9.5 10.5 -30 80 P5004
BAA48100030 108 127 15.9 17.5 -30 80 P5004
BAB00000030 110 120 10.5 11.600 -30 80 P5004
BA306700030 31.8 41.3 6.8 7.5 -30 80 P5004
BA307100030 31.8 41.3 7.9 8.700 -30 80 P5004
BA307700030 31.8 44.5 9.5 10.5 -30 80 P5004
BA309200030 32 40 5.7 6.3 -30 80 P5004
BA309800030 32 40 6 6.5 -30 80 P5004
BA310500030 32 42 7.3 8 -30 80 P5004
BA315300030 34.9 44.5 7.9 8.700 -30 80 P5004
BA315900030 35 43 5.7 6.3 -30 80 P5004
BA316200030 35 43 6.5 7.2 -30 80 P5004
BA316700030 35 45 8 8.8 -30 80 P5004
BA316900030 35 45 10 11 -30 80 P5004
BA317600030 35 47 10 11 -30 80 P5004
BA318300030 35 50 11.4 12.5 -30 80 P5004
BA318700030 36 44 5.7 6.3 -30 80 P5004
BA319000030 36 46 7.3 8 -30 80 P5004
BA319000070 36 46 7.3 8 -20 100 W5035
BA323800030 38 50 7 7.7 -30 80 P5004
BA322900120 38 48 9.5 10.5 -50 150 E0540
BA326800030 38.1 47.6 6.4 7 -30 80 P5004
BA327100030 38.1 47.6 7.4 8.1 -30 80 P5004
BA327500030 38.1 47.6 9.5 10.5 -30 80 P5004
BA400600030 40 48 5.7 6.3 -30 80 P5004
BA400800030 40 48 8 8.8 -30 80 P5004
BA402100030 40 50 7.3 8 -30 80 P5004
BA402600030 40 50 10 11 -30 80 P5004
BA403200030 40 52 10 11 -30 80 P5004
BA403900030 40 55 10 11 -30 80 P5004
BA405100030 40 55 11.4 12.5 -30 80 P5004
BA407900030 41.7 50.7 7.1 7.800 -30 80 P5004
BA408700030 42 50 6.5 7.2 -30 80 P5004
BAB02600030 110 125 11.4 12.5 -30 80 P5004
BAB06400030 110 130 14.5 16 -30 80 P5004
BAB08300030 110 135 18.2 20 -30 80 P5004
BAB17700030 114.3 127 9.5 10.5 -30 80 P5004
BAB28600030 115 125 11.4 12.5 -30 80 P5004
BAB30900030 115 130 11.4 12.5 -30 80 P5004
BAC01500030 120 130 11.4 12.5 -30 80 P5004
BAC02500030 120 135 11.4 12.5 -30 80 P5004
BAC04800030 120 140 15 16.5 -30 80 P5004
BAC04800060 120 140 15 16.5 -35 100 W5032
BAC06500030 120.7 133.4 9.5 10.5 -30 80 P5004
BAC17600030 125 135 11.4 12.5 -30 80 P5004
BAC19700030 125 140 11.4 12.5 -30 80 P5004
BAC21000030 125 145 14.5 16 -30 80 P5004
BAC23000030 125 150 18.2 20 -30 80 P5004
BAC25400042 127 139.7 9.5 10.5 -35 100 P5008
BAD01600030 130 145 9 9.9 -30 80 P5004
BAD03400030 130 145 14.5 16 -30 80 P5004
BAD14800030 133.4 152.4 15.9 17.5 -30 80 P5004
BAD16600030 135 155 14.5 16 -30 80 P5004
BAD25200030 139.7 152.4 14.3 15.700 -30 80 P5004
BA412200030 44.5 54 6.8 7.5 -30 80 P5004
BA413200030 44.5 57.2 9.5 10.5 -30 80 P5004
BA416100030 45 53 7.3 8 -30 80 P5004
BA416800030 45 55 7.3 8 -30 80 P5004
BA417200030 45 55 8 8.8 -30 80 P5004
BA417400030 45 55 10 11 -30 80 P5004
BA417900030 45 57.7 9.5 10.5 -30 80 P5004
BA418700030 45 60 11.4 12.5 -30 80 P5004
BA422100030 47.6 57.2 7.3 8 -30 80 P5004
BA423500030 47.6 63.5 9.5 10.5 -30 80 P5004
BA425800030 48 60 10 11 -30 80 P5004
BA500500030 50 58 7.3 8 -30 80 P5004
BA500900030 50 58 8 8.8 -30 80 P5004
BA501400030 50 60 7.3 8 -30 80 P5004
BA501700030 50 60 7.5 8.5 -30 80 P5004
BA501900030 50 60 10 11 -30 80 P5004
BA502000030 50 60 11.4 12.5 -30 80 P5004
BA502800030 50 62 9.5 10.5 -30 80 P5004
BA503400030 50 63 10 11 -30 80 P5004
BA505500030 50 65 11.4 12.5 -30 80 P5004
BA505500042 50 65 11.4 12.5 -35 100 P5008
BA507800030 50.8 60.3 7.9 8.700 -30 80 P5004
BA508400030 50.8 60.3 9.5 10.5 -30 80 P5004
BA509100030 50.8 63.5 9.5 10.5 -30 80 P5004
BA511600030 52 62 7.3 8 -30 80 P5004
BA512700030 53 63 7.3 8 -30 80 P5004
BA513800030 54 63.5 6.8 7.5 -30 80 P5004
BA516600030 55 65 7.3 8 -30 80 P5004
BA516900030 55 65 11 12.1 -30 80 P5004
BA517600030 55 70 11 12.1 -30 80 P5004
BA518000030 55 75 11.4 12.5 -30 80 P5004
BA518200030 55 75 14.5 16 -30 80 P5004
BAE01400030 140 150 10.5 11.600 -30 80 P5004
BAE03100030 140 150 11.4 12.5 -30 80 P5004
BAE05300030 140 160 14.5 16 -30 80 P5004
BAE08800030 140 165 18.2 20 -30 80 P5004
BAE19400030 145 165 14.5 16 -30 80 P5004
BAF01400030 150 160 11.4 12.5 -30 80 P5004
BAF07000041 150 170 14.5 16 -35 100 P5008
BAG02100030 160 180 15 16.5 -30 80 P5004
BAG04400030 160 185 18.2 20 -30 80 P5004
BAG17800030 165.1 177.8 14.3 15.700 -30 80 P5004
BAG28000030 165.1 190.5 19.1 21 -30 80 P5004
BAH00500030 170 180 11.4 12.5 -30 80 P5004
BAH01000030 170 190 15 16.5 -30 80 P5004
BAI01900030 180 190 11.4 12.5 -30 80 P5004
BAI05200030 180 200 15 16.5 -30 80 P5004
BAI19500030 184.2 203.2 15.9 17.5 -30 80 P5004
BAL01800030 200 210 11.4 12.5 -30 80 P5004
BAL03500030 200 220 15 16.5 -30 80 P5004
BAL06700030 200 225 18.2 20 -30 80 P5004
BAL12200030 203.2 215.9 14.3 15.700 -30 80 P5004
BAL12600030 203.2 228.6 19.1 21 -30 80 P5004
BAL26700030 210 230 14.5 16 -30 80 P5004
BAL34800030 215.9 228.6 14.3 15.700 -30 80 P5004
BA518400030 56 66 10 11 -30 80 P5004
BA518700030 56 71 11.4 12.5 -30 80 P5004
BA521800030 57.2 69.9 9.5 10.5 -30 80 P5004
BA600500030 60 68 7 7.7 -30 80 P5004
BA600700030 60 68 11.4 12.5 -30 80 P5004
BA601600030 60 70 7.3 8 -30 80 P5004
BA601700030 60 70 10.5 11.600 -30 80 P5004
BA601900030 60 70 12 13 -30 80 P5004
BA602700030 60 72 9 9.9 -30 80 P5004
BA603100030 60 72 10 11 -30 80 P5004
BA605800030 60 75 13.5 14.900 -30 80 P5004
BA607100030 60 80 12 13 -30 80 P5004
BA607700030 60 80 14 15.400 -30 80 P5004
BA610500030 62 70 7.3 8 -30 80 P5004
BA612200030 63 75 8.7 9.6 -30 80 P5004
BA613200030 63 78 11.4 12.5 -30 80 P5004
BA614300030 63 83 14.5 16 -30 80 P5004
BA615900030 63.5 73 9.5 10.5 -30 80 P5004
BA616600030 63.5 76.2 9.5 10.5 -30 80 P5004
BA620700030 65 73 7 7.7 -30 80 P5004
BA621600030 65 75 10 11 -30 80 P5004
BA622500030 65 80 11.4 12.5 -30 80 P5004
BA623400030 65 85 12 13 -30 80 P5004
BA625200030 66.7 76.2 6.8 7.5 -30 80 P5004
BA629200030 69.9 82.6 9.5 10.5 -30 80 P5004
BA629500030 69.9 85.7 12.7 14 -30 80 P5004
BA700300030 70 77 4.5 5 -30 80 P5004
BA700500030 70 80 10 11 -30 80 P5004
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