Characteristics and performance

Ideal for light duty one piece piston applications, the Hallite 77 seal is a simple, effective and economical design. Its compact dimensions enable the designer to keep the length of the piston to a minimum. It is an assembly of a continuous rubber seal and two scarf cut bearings.

The nitrile rubber seal is designed to be pre-loaded by the housing to ensure an effective seal at low pressure. The outward thrust of the rubber seal on the bearings as it reacts to increasing pressure prevents any extrusion damage in the sealing area.

The pair of polycetal bearings are proportioned to support the piston and its side load.

Product details

Ask an expert

Max pressure *

350 Bar

Temp range

-30°C
100°C

Max speed

0.5m/sec

* Max pressure stated is dependant on the material variant selected. Please consult the datasheet for further information.

Key:
  • Recomended
  • Possible
  • Not suitable

* For fluid types marked as possible, please call our team of experts on (02) 8886 1600 to talk through your requirements and determine if this seal is the most suitable for your needs.

 Dynamic applicationStatic application
Fluids based on mineral oil  
AnyRecommendedRecommended
Waterbased fluids  
HFA (5/95)PossibleRecommended
HFB (60/40 invert emulsion)RecommendedRecommended
HFC (water glycol)RecommendedRecommended
WaterPossiblePossible
Other fluid types  
Air/NitrogenNot suitablePossible
HFD (Phosphate ester ARYL Type)Not suitableNot suitable
Synthetic esters (HEES, HFDU)PossiblePossible