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Widely used term, although not formally standardised or defined, for hydraulic components with nominal widths of up to around 3 mm and flow rates of up to around 20 l/min. Pressures of up to around 30

Digital computer system where a shared functional unit controls two or more central units, each of which has at least one processor. (EDIN 44 300, Part 5).

Relationship between the change in output power and the corresponding change in input (control) power.

Combination of constant pumps comprising n individual pumps that are geometrically tiered such that 2n—1 delivery flow steps are obtained. By enabling and disabling (unpressurised idle circulation) in

Signal element which specifies a signal for a specific process. (DIN 19 226)

Signal processing with switching elements such as contactors among others. This technology is outdated, complex and slow. It is therefore only used for small, relatively simple systems. Exception: Saf

Damped movements

Seal that has to seal a moving surface. Although the expression is often used, it is incorrect, as the seal is not "dynamic", but only seals a moving surface. Opposite: " static" seal .

Spatial propagation of a pressure change (DIN 24 312).

Multiple pumps