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Line which returns leaked fluid to the container. Its dimensions should ensure this is possible at all times with hardly any pressure — even at low temperatures.

Since the pressure in a fluid is the same at every point (laws of hydraulics), the force generated is solely dependent on the size of the area on which the pressure is acting. It is possible therefore

Graphically represented mutual dependency between two operating variables, with one or more variable parameters being used as parameters. This kind of performance map can provide a complete overview o

Increasing a value by 1, i.e. counting up to higher values in individual steps.

Non-standardised short term used for hydraulic oils with additives designed to provide protection against ageing, corrosion and wear, as well as an additive with emulsifying (dispersing) and detergent

The control element is a flat plate that moves in the housing. Valves with flat slider are primarily used as directional valves.

Throttle valve that due to suitable formation of the control edge (e.g. by means of notches) has very good resolution in the low flow range.

Periodic change in the pressure in a device from values above atmospheric pressure to values below atmospheric pressure (e.g. on pumps between the suction and pressure phase).

Changes in the pressure due to a change in the inlet pressure with a given flow.

Valve with a rotating shaft as the control element that houses the control bores (Figure D 39) . Rotary valve are only used infrequently because their actuation is difficult to automate.