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Fluid devices and systems are always given a load from zero to the maximum, i.e. they are subject to a pulsating load. Therefore, either the fatigue strength under fluctuating stress or the fatigue li

. Cutting ring systems in accordance with DIN 2353, various forms of cutting rings are standardised in DIN 3861.

Velocity error

Refers to the frequency of a coupled system, in which the external periodic excitation in the system brings about the maximum amplitudes, i.e. where the exciter amplitude is most amplified.

Moving parts of devices are fixed in one or more positions by a detent and can be moved to another position given an increased shifting force.

Allows moving to a certain point on the level, without needing to define a functional relationship along the movement path in the individual path axes. The movements may be performed simultaneously or

English unit of pressure. Conversion: 1 bar = 14.5 psi and 1 psi = 0.07 bar (i.e. 1 000 psi = 70 bar).

Filter whose filter element contains paper made of natural or artificial fibres. Depending on the form involved, a distinction is made between star-shaped paper filters and wound paper filters.

All oscillations which are not harmonic, i.e. which are not periodic sine oscillations with a given frequency. A typical form of anharmonic oscillation is noise .

Flow control valve