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This is understood as the part of the overall control system of a plant, which is to control the compressed air or hydraulic fluid. in terms of direction, strength and pressure potential from the pump

Disc-shaped or spherical functional element in axial piston machines , which has the task of reversing the rotating piston chambers from suction chambers to pressure chambers and vice versa ( Figure S

Hand-operated switch, which activates, converts or deactivates a signal or an action path (DIN 19 226).

Hydraulic fluid line for control tasks.

Power of the input signal, which is necessary to control a valve under defined conditions (DIN 24 311).

Control element in directional , pressure and flow valves with a piston shape, which is generally countersunk, i.e. sealed with gap seals .

In the case of a control, the signal is transferred only in one direction. There is always one open action flow or one open impact chain ( Figure S 87 a ). A control chain as a whole can always be con

Design of the necessary form of control edges in hydraulic valves necessary for the respectively desired manner of influencing the flow rate ( fine control ).

Devices, which control a power flow. In fluid technology these are the valves, which influence the flow rate in terms of direction ( directional valves ), size ( flow valves ) and pressure ( pressure

Ratio of the areas of valves subjected to the control pressure (hydraulic or pneumatic) Valve . The control surface ratio plays a particularly vital role in the case of 2-way plug-in valves ( Figure S