Hallite PME back-up rings are uncut back-up rings made from specific conditioned PTFE to be assembled into one-piece external grooves. PME back-up rings are designed to support o-rings mainly in static applications. The cold flow feature of the specially conditioned virgin PTFE grade reliably closes the extrusion gap and protects the o-ring from extruding into the gap and helps to reasonably increase the acceptable system pressure. Hallite PME back-up rings are produced from stocked material and can be supplied on short notice.
- Not Suitable
* For fluid types marked as possible, please call our team of experts on +49 (0)40 73 47 48-0 to talk through your requirements and determine if this seal is the most suitable for your needs.
|Dynamic application||Static application|
|Fluids based on mineral oil|
|HFA (5/95)||Not suitable||Recommended|
|HFB (60/40 invert emulsion)||Not suitable||Recommended|
|HFC (water glycol)||Not suitable||Recommended|
|Other fluid types|
|HFD (Phosphate ester ARYL Type)||Not suitable||Recommended|
|Synthetic esters (HEES, HFDU)||Not suitable||Recommended|