NBR 90 Contoured Backup Rings BS309 to BS395 Cross Section 4.65mm
£0.04 – £6.90
NBR 90 Contoured Backup Rings
Back up rings are commonly used with O-rings, lip seals, and as reciprocating shaft seals. They are also used for piping connections joining two different materials – typically one flexible and one rigid.
90 shore Nitrile (Buna-N) provides sufficient elasticity to allow stretching over the major diameter of a piston and then snapping back into the gland groove cut into the piston. NBR90 Backup rings offer sufficient hardness to resist extrusion of the softer elastomeric O-ring performing the actual sealing function against the high pressure liquid or gas.
|Material||NBR (Nitrile) 90 shore|
|Back-up type||British Standard (imperial)|
|Maximum Temperature (°C)||+120°C|
|Minimum Temperature (°C)||-30°C|