The Hallite 667 polyurethane, single-acting piston seal for pneumatic applications design incorporates buffers to provide additional cushioning for pneumatic cylinders to prevent metal-to-metal contact at the end of the stroke, particularly if the retardation of the piston by the pneumatic cushion is insufficient. In turn, this additional buffering will reduce end stroke noise.
The Hallite 667 is manufactured in Hythane® 181, Hallite’s high-performance polyurethane, for easy installation, excellent low temperature performance, and long service life.
The material combined with the design of the dynamic sealing lip offers low friction, significantly less than that of a rubber seal, and an ultra-long life.
- 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|
|Any||Not suitable||Not suitable|
|HFA (5/95)||Not suitable||Not suitable|
|HFB (60/40 invert emulsion)||Not suitable||Not suitable|
|HFC (water glycol)||Not suitable||Not suitable|
|Other fluid types|
|HFD (Phosphate ester ARYL Type)||Not suitable||Not suitable|
|Synthetic esters (HEES, HFDU)||Not suitable||Not suitable|