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 (02) 8886 1600 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 |
