Characteristics and performance
Hallite PME back-up rings are uncut back-up rings made from specific conditioned PTFE to be assembled into one-piece external grooves. They 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.
Product details
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Temp range
-30°C
200°C
* Max pressure stated is dependant on the material variant selected. Please consult the datasheet for further information.
Key:
- Recomended
- Possible
- 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 | ||
| 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 |
