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Counting-only measuring system in which first a reference point must be moved to such that a specific position can be determined by counting increments forward or backward (Figure D 29) . The position

Circuit arrangement to prevent undesired actuations or to protect against overloading. The safety elements required for this, such as valves with a redundant design, electrical monitoring of switching

Valve combining several functions (e.g. flow + pressure or direction + flow + pressure). Example: flow control valve or continuously adjustable valves where the size of the flow or pressure is recorde

In general : Summarises the type and scope of the effect of disturbance variables and describes their influence on the system. Interference response of a controlled subsystem : Transfer function of th

Flexible lines to supply moved components with liquid or gaseous media. Hoses in hydraulic systems, alongside transporting hydraulic fluid to moved consumers ( cylinders , motors ), often have the tas

The proportion of hydraulic fluid within the total volume of a hydraulic accumulator that can be removed without causing any damage.

Hydraulic pump in which the pressure fluid is displaced by one or more pistons . Pistons may be arranged in a row or aligned radially or axially in relation to the drive shaft.

A differentiation must be made between the efficiency η of the filter element and of the complete filter. The efficiency of the filter element is defined by: It is superfluous if the β value is used.

The power loss in hydraulic systems results in an inflowing heat flow W z, which partly fills the heat capacity C of the oil and the metal parts surrounding it (pipes, cylinders, motors): Another part

In general : Drive elements activated by an amplifying auxiliary force (e.g. power steering, servo brake). In fluid technology : Collective term for an automatic drive system, which contains a power a