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Controller on which three physical variables are either measured or otherwise acquired and fed back. It corresponds on 3rd order systems to a state controller . On higher order systems (e.g. 5th order

Collective term for seals with a low height compared to the sealing surface and that adapt to the sealing surface over their entire width. They therefore generally have a more or less rectangular cros

Construction design of an axial piston pump , in which the swash plate and the control disc are firmly connected to the drive shaft and rotate with it, while the cylinder block, which is firmly connec

cf. viscosity

With all hydraulic motors of the vane and piston type that have an odd number of displacement chambers, the smaller and larger section will find themselves within the pressure range on an alternating

Pressure transducer that can measure the absolute pressure . For this purpose the side opposite the pressure to be measured is hermetically sealed as a reference chamber (e.g. with a glass plate or gl

Between the shear stress τ = F/A and the velocity gradients in a moving fluid (Figure D 93) the following relationship applies: The proportionality factor η is called the dynamic viscosity . It is a m

The cumulative efficiency of a filter describes how effective a filter is in retaining solid particles. According to ISO 4572 it is defined by ε x = filter cumulative efficiency for particles larger t

Special pressure switch valve with the task of switching the constant pump, which charges a hydraulic accumulator , to pressure-free circulation as soon as it reaches its charging pressure and to swit

On reaching a set pressure these switches actuate a normally open or normally closed contact. Limit switches are predominantly installed in pressure gauges ( Contact pressure gauge ). A differentiatio