Rotary sealing set Prädifa series KA | Product Series

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Inside Diameter (mm)

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Maximum Working Temperature (C)

Seal Material

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Rotary sealing set Prädifa series KA Rotary sealing set Prädifa series KA

Rotary sealing set Prädifa series KA

Where to Buy

Rotary seal for rotary distributors. Dynamic function on inner diameter. Extremely robust fabric-reinforced design. Double-acting. For high-pressure applications.

Technical Specifications

  • Media: Hydraulic
  • Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR)
  • Maximum Operating Pressure: 400 bar
  • Minimum Operating Temperature: -30 °C
  • Maximum Operating Temperature: 100 °C
  • Maximum Surface Speed: 0.2 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Thermal Application Type: Standard Moderate Temperature (-35 to 100°C)
  • Pressure Rating: High Pressure (< 500 bar)
Safety Warning

Full Product Description

The KA rotary sealing set is a compact seal for sealing the high-pressure channels of rotary transmissions. It consists of a rubber element with a fabric-reinforced running surface and two anti-extrusion rings. They increase stability and prevent extrusion into the gap which – due to the rotary motion (eccentricity) – is variable in most cases. Due to the special shape of the dynamic sealing area, a lubricant deposit is formed which ensures the preservation of the liquid film and thereby prevents dry running.

• Enhanced sealing performance in non-pressurized conditions.
• Robust seal profile for harshest operating conditions.
• Extreme wear resistance.
• Insensitive to pressure peaks.
• High temperature resistance in case of suitable compound selection.
• Extremely high extrusion resistance.
• Installation in closed and undercut housings.

Range of application:
Mainly for applications where the pressure alternates from one side of the seal to the other, such as pivots for rotating track rings, swivel joints, hose reels, and in machine tool hydraulics.

Related Documents

Literature and Reference Materials
Hydraulic Seals--PTD3350
Rotary Shaft Seals From Parker--Landing Page
Installation Guidelines for Rotary Seals--PTD3350
Rotary sealing set KA--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
Parker Final Exam in Physics / Sealing Systems Put to the Test
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Products Outside Diameter (mm) Inside Diameter (mm) Element Height (mm) Groove Width Minimum Working Temperature (C) Maximum Working Temperature (C) Seal Material
KA003000650 42 30 6 7 -30 100 Q5024
KA005000650 62 50 7.5 8.5 -30 100 Q5024
KA008700650 112 95 8.5 9.5 -30 100 Q5024
KA008800650 115 95 11 12 -30 100 Q5024
KA009000650 110 90 10 11 -30 100 Q5024
KA009200650 106 90 10 11 -30 100 Q5024
KA009300650 110 90 12 13 -30 100 Q5024
KA010100650 120 100 12 13 -30 100 Q5024
KA010900650 129 109 11 12 -30 100 Q5024
KA011000650 130 110 10 11 -30 100 Q5024
KA016100650 180 160 10 11 -30 100 Q5024
KA018100650 200 180 10 11 -30 100 Q5024
KA020000650 220 200 10 11 -30 100 Q5024
KA021100650 235 210 12.5 13.5 -30 100 Q5024
KA008900650 89 106 8.5 9.5 -30 100 Q5024
KA012800650 145 130 10 11 -30 100 Q5024
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