Characteristics and performance
The Hallite 657 overcomes high pressure and shocking loading which commonly cause pumping problems when using O-rings in flange sealing applications preventing reliable sealing. It is moulded in Hythane® 181, Hallite’s high-performance polyurethane, for easy installation and excellent low temperature performance.
Product details
The Hallite 657 is also offered in an industrial standard grade of polyurethane. Also listed are two non-SAE seal sizes for metric flanges.
Ask an expert
Max pressure *
Temp range
* Max pressure stated is dependant on the material variant selected. Please consult the datasheet for further information.
- 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 | Possible |
| HFB (60/40 invert emulsion) | Not suitable | Possible |
| HFC (water glycol) | Not suitable | Possible |
| Water | Not suitable | Possible |
| Other fluid types | ||
| Air/Nitrogen | Not suitable | Possible |
| HFD (Phosphate ester ARYL Type) | Not suitable | Not suitable |
| Synthetic esters (HEES, HFDU) | Not suitable | Recommended |
