Cylinder specificationLight dutyMedium dutyHeavy duty
PressureMax350 bar5000 psi500 bar7500 psi700 bar10000 psi
Normal160 bar2300 psi250 bar3600 psi400 bar6000 psi
WorkingNo pressure peaksIntermittent pressure peaksRegular pressure peaks
DesignLower 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 fluidGood system filtration no cylinder contamination likely.Good system filtration but some cylinder contamination likely.Contamination unavoidable from internal and external sources.
Working environmentClean 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.
UsageIrregular with short section of stroke at working pressures. Regular usage 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 applicationsMachine tools
Lifting equipment
Mechanical handling
Injection moulding machines
Control and robot equipment
Agricultural machinery
Packaging 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.