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The efficiency of a valve is determined by the pressure losses and the leakage losses . In most cases, the pressure losses Δp dr, which are comprised of form-related losses (form drag ratio) and throt

Ratio between the direction of the controlled hydraulic fluid flow and the direction of the electrical input flow for continuously adjustable valves.

The statement of a nominal size for valves is essentially only a reference value, which - contrary to the previously used "nominal width (NW)" - does not provide any indication of the cross-sections a

Over the years, several different processes have been developed for the spatial arrangement of the valves ( controls ) in a system, some of which still exist side by side. In hydraulics: A distinction

Piston pumps, in which the flow rate is pressure-controlled by suction and pressure valves . Here the suction valve opens when facing a weak spring force as soon as the returning piston creates negati

The positive displacement principle states that the space required to generate a flow rate during a function period is geometrically reduced (pressure period) and increased again (suction period). The

Noises created when switching and flowing through valves . As opposed to the switching and oscillation noises, the flow noises are the main sources of noise in valves. Oscillation noises primarily ari

Ability of a valve to transfer signals at a defined frequency. To quantify the valve dynamics, it was agreed to investigate the valve system with sinusoidal signals. Thus valve dynamics can be describ

Often, the entire is labelled as the controller. In a more narrow sense, this is only understood as the computing element (device, program ) within the which continuously compares the control variable

Theoretical preliminary work for the construction of a controller. An analysis is performed of the dynamic of the system. Then a search is conducted to find a controller that can provide this data and