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oil is lacking a series of characteristics for its tasks as a hydraulic fluid; these characteristics can be obtained by adding substances. These include substances for the improvement of the rust protection

position of the control element in the device. During this process mechanical or electrical feedback can be provided. Similar device-internal feedback controls are also used in flow valves or pump adjustments

filter element. Surface filters are designed with pores (gap) of a similar size, which means they can retain certain sizes of particle almost completely. However, they only have a small dirt holding capacity

Oldest form of elastic seals . They can be used as two lip seals for sealing at the inner and outer ring (Figure N 9 a) or as a single-lip ring with an adhesive section for single-sided sealing. The sealing

Controls can be designed in very different ways and with highly different controller structures to achieve a certain pilot control behaviour . It then becomes a case of control concepts. The control concepts

(rotation speed-dependent) residual flow is fed to the other consumers, a 3-way flow control valve can be used ( Figure S 107 )

incremental position encoder) and optically scanned (Figure I 9) . For absolute measurements, a zero mark can be added to the scale, with the counter returning to this each time.

lines) and the actual characteristic curve for the measuring instrument. The size of the deviation can be determined in various ways ( Figure L 22 ): Fixed point method: both end points are connected to

windings and with an output voltage that corresponds to the angular position of the rotor. The stator can comprise three separate windings offset by 120° (synchro) or two windings offset by 90° in relation

bushings (Figure B 25) . At the same time the bearing load becomes smaller because the suction chamber can be increased in size. At pressures of around 150 to 200 bar special gear pumps still have good efficiency