Additional protection element (without sealing function) to prevent gap extrusion with sealing components. To be used for pressures above 5 MPa.
Back-up Ring BS - spiral form
The Back-up ring BS has a spiral profile and because of its assembly ease, it is particularly suitable for all groove types. At pressurization, the spiral support ring presses against the groove flank.
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.
|pressure||static up to 250 MPa
linear up to 40 MPa
rotatoy up to 5 MPa
|temperature||-200°C / +260°C (material dependent)|
|speed||linear up to 0,5 m/s
rotatory up to 2 m/s