Characteristics and performance

The Hallite 83 Tri-Seal assembly offers the engineer many advantages when considering the design of cast iron, bronze, alloy etc. one-piece pistons in double-acting hydraulic cylinders, not the least being cost effectiveness with long and efficient seal life.

The Tri-Seal consists of two split plastic anti-extrusion rings and a nitrile synthetic rubber sealing member. Under pressure, the seal exerts a wedging action on the anti-extrusion ring, reducing the clearance between the cylinder bore and the piston, thus minimising the possibility of extrusion of the seal.

Wear rings are also available for this assembly, allowing the designer to benefit from the following advantages:

• Eliminate metal to metal contact in the bore
• One piece steel piston
• Improved alignment for optimum seal life
• Smoother operation

Product details

Note: For availability of sizes not listed please consult your local Hallite sales department.

When ordering Hallite 83 with wear rings please replace the last digit of the part number as indicated:

Without wear rings	Last digit of part no. _ _ _ _ _ _	0
With wear rings	Last digit of part no. _ _ _ _ _ _	9

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Product specification
Operating conditions
Fluid compatibility

Metric Inch

Max pressure *

400 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 +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
Any	Recommended	Recommended
Waterbased fluids
HFA (5/95)	Possible	Recommended
HFB (60/40 invert emulsion)	Recommended	Recommended
HFC (water glycol)	Not suitable	Not suitable
Water	Possible	Recommended
Other fluid types
Air/Nitrogen	Not suitable	Possible
HFD (Phosphate ester ARYL Type)	Not suitable	Not suitable
Synthetic esters (HEES, HFDU)	Possible	Possible

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83 – cost effective and long lasting double acting piston seal