The Back-up Ring BB has a closed profile with a concave groove. Due to its accessibility, it is particularly suitable for split grooves. It has a very good O-ring support at very high und pulsating pressures through the concave design.
Back-up Rings are exactly adapted to the groove height and are turned with standard PTFE virgin material. The required groove width increases by the width of the Back-up Rings.
Back-up Ring BB – concave unslotted
Fields of application
static
dynamic
single acting
double acting
Linear
Rotating
oszilating
Main use
protective element for elastomeric sealants against gap extrusion
Materials
PTFE, PTFE with filling material
Technical values
Materials
PTFE
Pressure
static up to 250 MPa
linear up to 40 MPa
rotatory up to 15 MPa
linear up to 40 MPa
rotatory up to 15 MPa
Temperature
-200°C / +260°C (material dependent)
Speed
linear up to 0,5 m/s
rotatory up to 2 m/s
rotatory up to 2 m/s
Maximum values temperature, speed and pressure are simultaneously not applicable! The values vary in dependence of material and media. For technical queries please contact our application consultants – we have the right solution for you.
Downloads
More Back-up Rings
Further to Back-up Ring BC – concave slotted
Your contact person for
Technology - General sealing topics, special constructions
Mr. Andreas Raidt
Head of Engineering
Head of Engineering
Do you have any questions, ideas, or suggestions? We are more than happy to assist you with advice. In person, over the phone, or digitally.
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