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

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Outside Diameter (mm)

Element Height (mm)

Groove Width

Minimum Working Temperature (C)

Maximum Working Temperature (C)

Seal Material

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

Symmetrical Rod and Piston Seal Prädifa series SA , 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. Short axial assembly length.

Technical Specifications

  • Inside Diameter: 5 to 279.4 mm
  • Outside Diameter: 12 to 298.5 mm
  • Thermal Application Type: Expanded Low and High Temperature (< -35 to 140°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), Ethylene Propylene Rubber (EPM, EPR, EPDM)
  • Maximum Operating Pressure: 350 bar
  • Minimum Operating Temperature: -50 to -20 °C
  • Maximum Operating Temperature: 80 to 150 °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 SA 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.
• Short axial assembly length.
• 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 SA 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
SAA03100030 101.6 111.1 4.8 5.3 -30 80 P5004
SAA09100030 101.6 133.4 15.9 17.5 -30 80 P5004
SAB22800030 114.3 127 6.4 7 -30 80 P5004
SAC01800030 120 140 10 11 -30 80 P5004
SAD02800030 130 150 10 11 -30 80 P5004
SAD04000030 130 160 15 16.5 -30 80 P5004
SAD16900030 133.4 152.4 9.5 10.5 -30 80 P5004
SAE01600060 140 160 10 11 -35 100 W5032
SAL00900030 200 220 10 11 -30 80 P5004
SAL19000030 209.6 235 12.7 14 -30 80 P5004
SA016300030 5 12 4 4.5 -30 80 P5004
SA020300030 6.4 12.7 3.2 3.5 -30 80 P5004
SA027200030 7.9 14.3 3.2 3.5 -30 80 P5004
SA033000570 9 15 3 3.3 -20 100 P5000
SA037500030 9.5 15.9 3.2 3.5 -30 80 P5004
SA111100030 12 20 4.5 5 -30 80 P5004
SA124000030 14 22 5 5.5 -30 80 P5004
SA249000030 25.4 34.9 4.8 5.3 -30 80 P5004
SA316700030 31.8 44.5 6.4 7 -30 80 P5004
SA324700030 32 40 4.5 5 -30 80 P5004
SA340700030 35 45 5 5.5 -30 80 P5004
SA341800030 35 50 8 9 -30 80 P5004
SA400800030 40 50 5 5.5 -30 80 P5004
SA400900030 40 50 5.7 6.3 -30 80 P5004
SA423900030 45 55 5.7 6.3 -30 80 P5004
SA536300030 56 71 8.6 9.5 -30 80 P5004
SA603400030 60 80 11.4 12.5 -30 80 P5004
SA636900030 65 80 7.5 8.5 -30 80 P5004
SA800700030 80 90 5 5.5 -30 80 P5004
SA804100030 80 100 11.4 12.5 -30 80 P5004
SA838100030 85 100 8.6 9.5 -30 80 P5004
SA861900030 88.9 101.6 6.4 7 -30 80 P5004
SA258600030 27 33.3 3.2 3.5 -30 80 P5004
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