Back-up ring Prädifa series XC, Polon® | #XC12500070903XH


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XC12500070903XH XC12500070903XH

Back-up ring Prädifa series XC, Polon® | #XC12500070903XH

Spiral PTFE back-up ring to prevent extrusion.


Technical Specifications

  • Inside Diameter (mm): 122
  • Outside Diameter (mm): 125
  • Minimum Working Temperature (°C): -190
  • Groove Depth (mm): 4.4
  • Element Height (mm): 1.5
  • Seal Material: 7
  • Maximum Working Temperature (°C): 230
  • Media: Hydraulic
  • Polymer Material Options: Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®)
  • Maximum Operating Pressure: 400 bar
  • Minimum Operating Temperature: -190 °C
  • Maximum Operating Temperature: 230 °C
  • Maximum Surface Speed: 0 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Thermal Application Type: Extremely High Temperature (> 205°C)
  • Pressure Rating: High Pressure (< 500 bar)
Safety Warning

Item Information

The XC Polon® anti-extrusion ring (spiral cut version) is used in combination with O-rings, preferably in static applications, to prevent gap extrusion. XC anti-extrusion rings are suitable for moderate pressure loads. Due to the spiral shape, 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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