Piston sealing set Prädifa series N0 | Product Series

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Outside Diameter (mm)

Inside Diameter (mm)

Element Height (mm)

Groove Width

Minimum Working Temperature (C)

Maximum Working Temperature (C)

Seal Material

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Piston sealing set Prädifa series N0 Piston sealing set Prädifa series N0

Piston sealing set Prädifa series N0 OBSOLETE

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Technical Specifications

  • Thermal Application Type: High Temperature (< 205°C), Standard Moderate Temperature (-35 to 100°C)
  • Media: Hydraulic
  • Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM)
  • Maximum Operating Pressure: 500 bar
  • Minimum Operating Temperature: -40 to -20 °C
  • Maximum Operating Temperature: 100 to 150 °C
  • Maximum Surface Speed: 1 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Pressure Rating: Extremely High Pressure (< 800 bar)

Full Product Description

The two-piece N0 sealing set for hydraulic cylinders is made of a rubber/rubber-fabric U-cup and a pressure ring of a fabric-reinforced laminate. The U-cup has an integral spacer element eliminating the need for a separate spacer ring that is normally required for chevron packings. The fabric-reinforced laminate retainer ring prevents damage to the U-ring at the gap between the piston and cylinder wall (gap extrusion). It is extremely resistant against wear and pressure peaks and delivers reliable performance even in the most adverse conditions (water or particle contamination).

• High resistance to extrusion through a massive fabric reinforced back-up ring.
• Due to the favorable profile design there is no dynamic pressure build-up between the sealing elements in double-acting cylinders.
• Through the choice of suitable materials the seal is adapted for various working media.
• Excellent sealing function at high surface speeds or under high pressures.
• Long working life keeps maintenance costs down.

Range of application:
Sealing of pistons in hydraulic cylinders. For double-sided pressure loading the seal profile must be used in a back-to-back arrangement.

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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
N0003200361 32 20 7.5 7.5 -40 100 Q5021
N0004000361 40 25 9.5 9.5 -40 100 Q5021
N0005000361 50 35 9.5 9.5 -40 100 Q5021
N0006400361 63 48 9.5 9.5 -40 100 Q5021
N0008000361 80 60 12.5 12.5 -40 100 Q5021
N0009000361 90 70 12.5 12.5 -40 100 Q5021
N0010000361 100 80 12.5 12.5 -40 100 Q5021
N0011400361 115 90 15.5 15.500 -40 100 Q5021
N0012500361 125 100 15.5 15.500 -40 100 Q5021
N0013600361 140 110 20 20 -40 100 Q5021
N0014000361 140 115 15.5 15.500 -40 100 Q5021
N0016000361 160 130 19 19 -40 100 Q5021
N0017200361 170 140 20 20 -40 100 Q5021
N0018000361 180 150 19 19 -40 100 Q5021
N0019000361 190 160 20 20 -40 100 Q5021
N0020000361 200 170 19 19 -40 100 Q5021
N0022000361 220 190 19 19 -40 100 Q5021
N0025000361 250 220 19 19 -40 100 Q5021
N0026000361 260 230 19 19 -40 100 Q5021
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