PME
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.
Temp range
-30°C
200°C
Key:
- Recomended
- Possible
- Not Suitable
* For fluid types marked as possible, please call our team of experts on +44 208 941 2244 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 | ||
| Any | Not suitable | Recommended |
| Waterbased fluids | ||
| HFA (5/95) | Not suitable | Recommended |
| HFB (60/40 invert emulsion) | Not suitable | Recommended |
| HFC (water glycol) | Not suitable | Recommended |
| Water | Not suitable | Recommended |
| Other fluid types | ||
| Air/Nitrogen | Not suitable | Possible |
| HFD (Phosphate ester ARYL Type) | Not suitable | Recommended |
| Synthetic esters (HEES, HFDU) | Not suitable | Recommended |