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Spiral PTFE back-up ring to prevent extrusion.
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.
No CAD files available
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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