Cylinder Specification Light Duty Medium Duty Heavy Duty
Pressure Max 350 bar 5000 psi 500 bar 7500 psi 700 bar 10000 psi
Normal 160 bar 2300 psi 250 bar 3600 psi 400 bar 6000 psi
Working No Pressure peaks Intermittent Pressure Peaks Regular Pressure Peaks
Design Lower operating stresses. Rigid well aligned mounting. Minimal side loading. Steady operating stresses with intermittent high stress. Some side loading. High stressed for majority of its working life. Side loading common.
Condition of Fluid Good system filtration no cylinder contamination likely. Good system filtration but some cylinder contamination likely. Contamination unavoidable from internal and external sources.
Working Environment Clean and inside a building. Operating temperature variations limited. Mixture of indoor and outdoors but some protection from the weather. Outdoors all the time or a dirty indoor area. Wide variations in temperature, both ambient and working. Difficult service conditions.
Usage Irregular with short section of stroke at working pressures. Regular useage but at low pressure. Regular usage with most of the stroke at working pressure. Large amount of usage at high pressure with peaks throughout the stroke.
Typical Applications Machine tools
Lifting equipment
Mechanical handling
Injection moulding machines
Control and robot equipment
Agricultural machinery
Packging equipment
Aircraft equipment
Light duty tippers
Heavy duty lifting equipment
Agricultural equipment
Light duty off-road vehicles
Cranes and lifting platforms
Heavy duty machine tool
Injection moulding machines
Some auxiliary mining machinery
Aircraft equipment
Heavy duty tippers (telescopic)
Heavy duty mechanical handling
Foundry and metal fabrication plant
Mining machinery
Roof supports
Heavy duty earth moving machinery
Heavy duty off-road vehicles
Heavy duty presses

From many years of application experience with sealing hydraulic equipment, supported by the results from an extensive test programme, we know that it is necessary to link the three main operating features of speed, pressure, and temperature to achieve a satisfactory seal performance.

After carefully considering each product we are able to specify the maximum speed and pressure within a temperature range within which the seal will operate safely. If your operating conditions do not comply with those recommended please send your details to your local Hallite sales office.