Characteristics and performance
The Hallite 755 double-acting piston seal is a compact, low friction seal for light to medium duty applications designed originally to fit North American NFPA groove standards.
Comprised of a tough, wear-resistant thermoplastic elastomer face seal which is pre-loaded by a square cross-section NBR expander, the face material comes in a number of material options to extend operating conditions. The housing width allows a narrow width piston to be used.
We recommend that an adequate bearing, such as the Hallite 506 or 87 bearing strip or the Hallite 533 molded bearing, is mounted on one or both sides of the seal. For further details of bearing grooves, please refer to the appropriate product data sheet.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 +86 (0)21 3351 7272 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)||Possible||Recommended|
|HFC (water glycol)||Not suitable||Not suitable|
|Other fluid types|
|HFD (Phosphate ester ARYL Type)||Not suitable||Not suitable|
|Synthetic esters (HEES, HFDU)||Recommended||Recommended|