Back-up ring Prädifa series N0300-90, nitrile-butadiene rubber, 90 Shore A, broad applicability, black, Parbak® | #180434N0300


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Back-up ring Prädifa series N0300-90, nitrile-butadiene rubber, 90 Shore A, broad applicability, black, Parbak® | #180434N0300

Hard NBR back-up ring used together with O-ring to prevent extrusion


Technical Specifications

  • Groove Depth (mm): 5.90
  • Minimum Working Temperature (°C): -55
  • Element Height (mm): 5.99
  • Maximum Working Temperature (°C): 105
  • Seal Material: N0300
  • Outside Diameter (mm): 149.05
  • Inside Diameter (mm): 144.17
  • Media: Hydraulic
  • Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR)
  • Minimum Operating Temperature: -55 °C
  • Maximum Operating Temperature: 105 °C
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Thermal Application Type: Low Temperature (< -35 C)
Safety Warning

Item Information

Parbak® back-up rings are made from hard elastomers and prevent migration of O-rings into the sealing gap when subjected to high pressures.
Parbak® is a Parker standard rubber back-up ring of contoured design which improves the sealing effect and increases service life. It is intended for use in dynamic and static seal applications.

Features of Parbak® back-up rings:
• Elastic memory permits Parbak® rings to be stretched into place for assembly without preconditioning or cutting
• Continuous construction prevents damage to the O-ring seal
• Lubrication is enhanced by rubber which absorbs system fluid and does not plate out on rubbing surfaces
• For a wide temperature range from -55 °C to 105 °C
• Compatible with a wide range of fluids such as Skydrol, Pydraul, Houghto-Safe, HydroDrive

Radius of the groove bottom r1 = 0.2 - 0.4 mm

Parbak® back-up ring Praedifa series is available in the following compounds:
N0300-90
V0709-90



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Where to Buy

Local Contact

South Africa Headoffice

Parker Hannifin (Africa) Pty LTD

Sales Company South Africa

10 Berne Avenue

Aeroport

Kempton Park

Gauteng

South Africa

1620

Phone

0027 11 961 0700

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