Back-up ring Prädifa series XB, Polon® | #XB09200010902YH


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XB09200010902YH XB09200010902YH

Back-up ring Prädifa series XB, Polon® | #XB09200010902YH

Spliced PTFE back-up ring to prevent extrusion.


Technical Specifications

  • Outside Diameter (mm): 92
  • Minimum Working Temperature (°C): -190
  • Groove Depth (mm): 3.25
  • Element Height (mm): 1.5
  • Seal Material: 1
  • Maximum Working Temperature (°C): 230
  • Inside Diameter (mm): 85.5
  • Media: Hydraulic
  • Polymer Material Options: Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®)
  • Maximum Operating Pressure: 200 bar
  • Minimum Operating Temperature: -200 to -40 °C
  • Maximum Operating Temperature: 80 to 230 °C
  • Maximum Surface Speed: 0.5 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Thermal Application Type: Extremely High Temperature (> 205°C)
  • Pressure Rating: Medium Pressure (< 250 bar)
Safety Warning

Item Information

The XB Polon® anti-extrusion ring (single turn scarf cut version) is used in combination with O-rings, preferably in static applications, to prevent gap extrusion. XB anti-extrusion rings are suitable for high pressure loads. Due to the scarf cut, the rings are easy to install in closed grooves.

Polon® anti-extrusion rings are available in three versions:
XA: Single turn continuous
XB: Single turn scarf cut
XC: Spiral cut

• Insensitive to pressure peaks.
• High extrusion resistance.
• Excellent media resistance in case of suitable compound selection.
• Suitable compounds available for special requirements of the chemical process industry.
• Suitable compounds available for special requirements of the food processing industry.
• Any desired nominal diameter available due to use of machining technique.
• Installation in closed and undercut housings.

We recommend to specify back-up rings when at least one of the following working conditions is present in cases where the intention is to seal with O-Rings only:
• Pressure above 70 bar.
• Diametral clearance exceeding 0.25 mm at p > 10 bar.
• High stroke frequency.
• High temperatures.
• Contaminated medium.
• Strong pressure pulsing or pressure changes.

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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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