Cushioning seal Prädifa series PP | Product Series

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Outside Diameter (mm)

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Minimum Working Temperature (C)

Maximum Working Temperature (C)

Seal Material

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Cushioning seal Prädifa series PP Cushioning seal Prädifa series PP

Cushioning seal Prädifa series PP

Where to Buy

Cushioning seal for pneumatic cylinders with incorporated venting channels. Robust design.

Technical Specifications

  • Media: Pneumatic
  • Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM), Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®), Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN)
  • Maximum Operating Pressure: 16 bar
  • Minimum Operating Temperature: -50 to -20 °C
  • Maximum Operating Temperature: 80 to 200 °C
  • Maximum Surface Speed: 1 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: Yes
  • Thermal Application Type: Standard Moderate Temperature (-35 to 100°C), Expanded Low and High Temperature (< 205°C), High Temperature (< 205°C), Low Temperature (< -35 C)
  • Pressure Rating: Pneumatic Pressure (< 16 bar)
Safety Warning

Full Product Description

The Ultrathan® PP cushioning ring is used for sealing cushioning pistons in pneumatic cylinders in the end position. By means of the sealing lip its special shape provides sealing toward the cushioning piston and concurrently acts as a valve during the return stroke. The combination of geometry and material ensures high wear resistance.

• No mechanical check valves required since their function is performed by the cushioning rings.
• High cushioning consistency due to automatic centering, even in the case of misalignment of the cushioning spear and the cylinder head.
• Optimum use of design-related cushion travel.
• Robust seal profile for harshest operating conditions.
• Immediate response to reversed direction thanks to incorporated venting channels.
• Extreme wear resistance.
• Easier installation.
• Excellent media resistance in case of suitable compound selection.
• Installation in closed housings.

Range of application:
For pneumatic cylinders with end-position cushioning.

Related Documents

Literature and Reference Materials
Pneumatic Seals--PTD3351
Compound Data Sheet NBR N3589
Compound Data Sheet TPU P5008
Cushioning seal PP--PTD3351
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
Communities, Blogs & Industry Links
Industry Pneumatics
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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
PP3040V3839 30 40 7.8 7 -20 200 V3839
PP3242N3589 32 42 7.8 7 -20 100 N3589
PP3242P5008 32 42 7.8 7 -35 100 P5008
PP3242V3681 32 42 7.8 7 -20 200 V3681
PP3242V3839 32 42 7.8 7 -20 200 V3839
PP3646N3589 36 46 7.8 7 -20 100 N3589
PP3646P5008 36 46 7.8 7 -35 100 P5008
PP3646P5009 36 46 7.8 7 -45 95 P5009
PP3646V3681 36 46 7.8 7 -20 200 V3681
PP3646V3839 36 46 7.8 7 -20 200 V3839
PP4050N3589 40 50 7.8 7 -20 100 N3589
PP4050P5008 40 50 7.8 7 -35 100 P5008
PP4050P5009 40 50 7.8 7 -45 95 P5009
PP4050V3681 40 50 7.8 7 -20 200 V3681
PP4050V3839 40 50 7.8 7 -20 200 V3839
PP5060N3589 50 60 7.8 7 -20 100 N3589
PP5060P5008 50 60 7.8 7 -35 100 P5008
PP5060P5009 50 60 7.8 7 -45 95 P5009
PP5060V3681 50 60 7.8 7 -20 200 V3681
PP5060V3839 50 60 7.8 7 -20 200 V3839
PP5067N3589 50 67 11 12.5 -20 100 N3589
PP5067N8602 50 67 11 12.5 -50 80 N8602
PP5067V3839 50 67 11 12.5 -20 200 V3839
PP5774N3589 57 74 11 12.5 -20 100 N3589
PP5774N8613 57 74 11 12.5 -50 80 N8613
PP5774P5008 57 74 11 12.5 -35 100 P5008
PP5774V3839 57 74 11 12.5 -20 200 V3839
PP7087N3512 70 87 11 12.5 -20 150 N3512
PP7087N3589 70 87 11 12.5 -20 100 N3589
PP7895N3589 78 95 11 12.5 -20 100 N3589
PP7895P5008 78 95 11 12.5 -35 100 P5008
PP7895V3839 78 95 11 12.5 -20 200 V3839
PP0408N3589 4.5 8 3.5 3.3 -20 100 N3589
PP0509N3589 5 9 4.1 3.700 -20 100 N3589
PP0509V3839 5 9 4.1 3.700 -20 200 V3839
PP0610N3589 6 10 4.1 3.700 -20 100 N3589
PP0811N3589 8 11.6 3.5 3.3 -20 100 N3589
PP0811P5008 8 11.6 3.5 3.3 -35 100 P5008
PP0811P5009 8 11.6 3.5 3.3 -45 95 P5009
PP0811V3664 8 11.6 3.5 3.3 -20 200 V3664
PP0811V3839 8 11.6 3.5 3.3 -20 200 V3839
PP0915N3589 9.5 15 4.6 4.5 -20 100 N3589
PP0915P5008 9.5 15 4.6 4.5 -35 100 P5008
PP0915P5009 9.5 15 4.6 4.5 -45 95 P5009
PP0915P5010 9.5 15 4.6 4.5 -30 100 P5010
PP0915V3664 9.5 15 4.6 4.5 -20 200 V3664
PP0915V3839 9.5 15 4.6 4.5 -20 200 V3839
PP1018N3589 10 18 7.8 7 -20 100 N3589
PP1018V3839 10 18 7.8 7 -20 200 V3839
PP1218N3589 12 18 5 4.8 -20 100 N3589
PP1218P5008 12 18 5 4.8 -35 100 P5008
PP1218P5009 12 18 5 4.8 -45 95 P5009
PP1218V3664 12 18 5 4.8 -20 200 V3664
PP1218V3839 12 18 5 4.8 -20 200 V3839
PP1220N3589 12 20 7.8 7 -20 100 N3589
PP1422N3589 14 22 7.8 7 -20 100 N3589
PP1422P5008 14 22 7.8 7 -35 100 P5008
PP1422P5009 14 22 7.8 7 -45 95 P5009
PP1422V3681 14 22 7.8 7 -20 200 V3681
PP1422V3839 14 22 7.8 7 -20 200 V3839
PP1622N3589 16 22 5.5 5.2 -20 100 N3589
PP1622P5008 16 22 5.5 5.2 -35 100 P5008
PP1622P5009 16 22 5.5 5.2 -45 95 P5009
PP1622V3681 16 22 5.5 5.2 -20 200 V3681
PP1622V3839 16 22 5.5 5.2 -20 200 V3839
PP1624N3589 16 24 7.8 7 -20 100 N3589
PP1624P5008 16 24 7.8 7 -35 100 P5008
PP1624V3681 16 24 7.8 7 -20 200 V3681
PP1624V3839 16 24 7.8 7 -20 200 V3839
PP1826N3589 18 26 7.8 7 -20 100 N3589
PP1826P5008 18 26 7.8 7 -35 100 P5008
PP1826V3681 18 26 7.8 7 -20 200 V3681
PP2028N3589 20 28 7.8 7 -20 100 N3589
PP2028P5008 20 28 7.8 7 -35 100 P5008
PP2028P5009 20 28 7.8 7 -45 95 P5009
PP2028V3681 20 28 7.8 7 -20 200 V3681
PP2028V3839 20 28 7.8 7 -20 200 V3839
PP2230N3589 22 30 7.8 7 -20 100 N3589
PP2230P5008 22 30 7.8 7 -35 100 P5008
PP2533N3589 25 33 7.8 7 -20 100 N3589
PP2533P5008 25 33 7.8 7 -35 100 P5008
PP2533P5009 25 33 7.8 7 -45 95 P5009
PP2533V3664 25 33 7.8 7 -20 200 V3664
PP2533V3681 25 33 7.8 7 -20 200 V3681
PP2533V3839 25 33 7.8 7 -20 200 V3839
PP2836N3589 28 36 7.8 7 -20 100 N3589
PP2836P5008 28 36 7.8 7 -35 100 P5008
PP2836V3664 28 36 7.8 7 -20 200 V3664
PP2836V3681 28 36 7.8 7 -20 200 V3681
PP3040N3589 30 40 7.8 7 -20 100 N3589
PP3040P5008 30 40 7.8 7 -35 100 P5008
PP3040P5009 30 40 7.8 7 -45 95 P5009
PP3040V3664 30 40 7.8 7 -20 200 V3664
PP3040V3681 30 40 7.8 7 -20 200 V3681
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