Back-up rings
![Bagues anti-extrusion - Back-up rings - 420 x 185](/media/bagues_anti_extrusion_back_up_rings_420_185__077977100_1551_11052015.jpg)
The back-up rings are generally combined with primary seals (or O'Rings) and are used to help the O'Rings resist the effects of extrusion. A back-up ring is required for increased pressures or significant extrusion gaps in the system. Several types of back-up rings are available - concave, single spire, double spire - cut or uncut - in rubber, PTFE, POM and PA, among others.
BECA 008
![BECA 008](/media/thumbnails/beca_008_profil__000145400_1603_25112013.gif)
BECA 008
Materials: NBR/FKM
Temperature:
-30°C / +200°C
Pressure:
20 MPa alternating
Speed:
2 m/s alternating
BECA 008P Piston
![BECA 008 PTFE](/media/thumbnails/beca_008_ptfe__070869800_1506_02102014.gif)
BECA 008P Piston
Materials: PTFE
Temperature:
-200°C / +260°C
Pressure:
20 MPa alternating
Speed:
2 m/s alternating
BECA 008P Rod
![BECA 008 PTFE](/media/thumbnails/beca_008_ptfe__070869800_1506_02102014.gif)
BECA 008P Rod
Materials: PTFE
Temperature:
-200°C / +260°C
Pressure:
20 MPa alternating
Speed:
2 m/s alternating
BECA 011 Piston
![BECA 011](/media/thumbnails/beca_011_profil__073065900_1603_25112013.gif)
BECA 011 Piston
Materials: PTFE
Temperature:
-200°C / +260°C
Pressure:
40 MPa alternating
Speed:
2 m/s alternating
BECA 011 Rod
![BECA 011](/media/thumbnails/beca_011_profil__073065900_1603_25112013.gif)
BECA 011 Rod
Materials: PTFE
Temperature:
-200°C / +260°C
Pressure:
40 MPa alternating
Speed:
2 m/s alternating
BECA 012 Piston
![BECA 012](/media/thumbnails/beca_012_profil__006276100_1603_25112013.gif)
BECA 012 Piston
Materials: PTFE
Temperature:
-200°C / +260°C
Pressure:
40 MPa alternating
Speed:
2 m/s alternating
BECA 012 Rod
![BECA 012](/media/thumbnails/beca_012_profil__006276100_1603_25112013.gif)
BECA 012 Rod
Materials: PTFE
Temperature:
-200°C / +260°C
Pressure:
40 MPa alternating
Speed:
2 m/s alternating