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.
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 *
* Max pressure stated is dependant on the material variant selected. Please consult the datasheet for further information.
- Not suitable
* For fluid types marked as possible, please call our team of experts on +39 (0)58 642 8287 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||Possible|
|HFB (60/40 invert emulsion)||Not suitable||Possible|
|HFC (water glycol)||Not suitable||Possible|
|Other fluid types|
|HFD (Phosphate ester ARYL Type)||Not suitable||Not suitable|
|Synthetic esters (HEES, HFDU)||Not suitable||Recommended|