180276N0300 - Back-up ring Prädifa series N0300-90, nitrile-butadiene rubber, 90 Shore A, broad applicability, black, Parbak® | Parker NA

Back-up ring Prädifa series N0300-90, nitrile-butadiene rubber, 90 Shore A, broad applicability, black, Parbak® | #180276N0300

Back-up ring Prädifa series N0300-90, nitrile-butadiene rubber, 90 Shore A, broad applicability, black, Parbak® | #180276N0300

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


Technical Specifications

  • Groove Depth (mm): 2.90
  • Minimum Working Temperature (°C): -55
  • Element Height (mm): 3
  • Maximum Working Temperature (°C): 105
  • Seal Material: N0300
  • Outside Diameter (mm): 281.9
  • Inside Diameter (mm): 279.86
  • 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

Parker Hannifin Manufacturing Germany GmbH & Co. KG

Packing Division Europe

Arnold-Jäger-Str. 1

74321 Bietigheim-Bissingen

Germany

Phone

+49 (0) 7142 351-0

Fax

+49 (0) 7142 351-293

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