The Hallite 652 is a rod seal designed designed to provide a dry sealing solution specifically for heavy-duty longwall mining applications using water-based fluids. The design is also suitable for standard hydraulic oil applications.
The seal is manufactured in a polyurethane shell energised by a high quality O-ring, or in some cases a profiled NBR energiser as used in the Hallite 621 twin lip rod seal. The Hallite 652 also incorporates an acetal anti-extrusion ring to withstand side loads and extreme pressure peaks even with the extrusion gaps, which are the result of using remote plastic bearing strips like the Hallite 506 or 708.
The Hallite 652’s seal shell is moulded in Hythane® 181, Hallite’s high-performance polyurethane, for easy installation.
- Not Suitable
* For fluid types marked as possible, please call our team of experts on +44 208 941 2244 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|
|HFB (60/40 invert emulsion)||Recommended||Recommended|
|HFC (water glycol)||Possible||Possible|
|Other fluid types|
|HFD (Phosphate ester ARYL Type)||Not suitable||Not suitable|
|Synthetic esters (HEES, HFDU)||Recommended||Possible|