Hallite 668 twin lip static seal is designed to seal the joint between the gland and the cylinder bore or between the rod and the piston. The sealing element is a very effective replacement for the conventional O-ring and back-up ring combination in heavy-duty applications.
The main advantage is its high groove stability compared to a conventional O-ring thus reducing fluid transfer caused by pumping.
Every nominal diameter of the Hallite 668 is suitable for a range of bore diameter, ØD₁ , or rod diameters, Ød₁.
The Hallite 668 is moulded in Hythane® 181, Hallite’s high-performance polyurethane, for easy installation and excellent low temperature performance.
The Hallite 668 is generally supplied as a bespoke part. Contact your local Hallite sales team for details.
- 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|
|HFA (5/95)||Not suitable||Recommended|
|HFB (60/40 invert emulsion)||Not suitable||Recommended|
|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|