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Feedback of the position of the control spool of a continuously adjustable valve by centring the control spool with spring action (item 8 and 9 (Figure B 3) ).

Combination of high pass and low pass that is so designed that only signal frequencies in a defined frequency range (frequency pass) are allowed to pass largely unchanged; on the other hand elements o

Ring made of a particularly wear-resistant elastomer or thermoplastic that is applied to the side of a seal away from the pressure to prevent the seal material wandering into the clearance gap under p

Axial piston pumps have several pistons that are arranged parallel to the drive shaft. They are available as either variable pumps or constant pumps. Axial piston variable pumps operate, for example,

As with axial piston pumps, axial piston motors are also available in the bent axis and swash plate designs; both variants with fixed and adjustable displacement. The following sectional drawing shows

Pump (motor) with several pistons (as rule 7 to 11) that are arranged parallel to the drive shaft. The pistons are actuated by a swash plate or a drive flange ( inclined axis ). These two designs diff

Gear pumps have two sliding-contact areas (sealing areas): at the periphery as well as the two sides of the gear wheels, i.e. in the axial direction. The pressure-controlled leakage that occurs here c

Statement list

Triggers the control process. It can be provided manually or by a process variable. In relation to its magnitude and its change over time, agreement is required in both cases (DIN 19 226).

Pressure that is defined by the person planning a device or installation to fulfil the intended functions. It corresponds to the nominal basis according to DIN 40 200 (DIN 24 312).