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Resistance of a seal material to mechanical abrasion. The abrasion resistance depends largely on the material and its hardness. However, it is also affected by the temperature and the degree of exposu

Characterises the area of hydraulics in which pressurised water ( HWBF ) is used as the medium. As the water does not have the necessary viscosity or lubrication properties, often special devices and

High-precision measuring instrument which determines pressure by "weighing" it whereby the force on the piston is compared with the force exerted by calibrated weights. In order to eliminate friction,

Theoretical methods for the studying static and dynamic behaviour of , e.g. differential equations, Nyquist plots, frequency response , root locus as well as digital or analogue simulation.

Sum of the measures and processes that are necessary for a drive to place itself in operation automatically. These include: measuring system polling as whether all systems are operational, Undertaking

Control whose program is specified by the type of functional elements and their connections (DIN 19 237). With hard-wired controls, application-specific logical connections are made by individual pipe

Symbolic representation of functional interactions between the signals of a system or a number of interacting systems. The functional dependence of the output signals on the input signals is shown as

Valve that switches the pump to a pressure-free circulation as soon as its flow rate is no longer needed in the circuit. Special 2/2 directional valves or pressure valves are suitable for use as a shu

Of a characteristic curve : A curve ( characteristic curve ), whose course deviates continuously or intermittently from a straight, line is approached by straight line at a certain operating point. Su

Describes the flow rate through laminar flow resistors ( capillary tube , gap). It is assumed, based on a steady-state laminar flow and a constant cross section flow, that the compressive force will b