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Process, in which the velocity of a hydraulic drive element is controlled by changing the geometric displacement of a pump or motor . This includes the pump control (Figure V 10 a) and secondary adjus

Tabular summary of the dirt particles in a hydraulic fluid according to their particle size. The profile of contamination is increasingly being demanded of filter manufacturers by users as a purity re

Hydraulic motor with a larger number of displacement units , which are pooled into two or three groups and can be switched in order to achieve different displacement and therefore different speeds. Th

A controller, in fluid technology must be configured through fine tuning of the various parameters (e.g. P-component, I-component, etc.) or for state controllers of the amplifiers such that the system

Mechanical connection between the moving parts of a fluid power control device and the moving part of the device to be controlled for the purpose of . Example: Two stage servo valve with flapper-nozzl

Gap that is necessary to move a sliding element past a stationary element. In hydraulics the sliding gap plays an important role because on gap seals its magnitude defines to a significant extent the

In fluid technology electro-mechanical used to actuate valves are often referred to as solenoids. These are not permanent magnets, but are electromagnets. An electrical input signal (voltage or curren

Dynamic stabilisation method for oscillations based on the removal of energy by throttling, leakage (bypass) or also friction with the special feature that it can only be activated if oscillations occ

Distance that is required to form from a turbulent a laminar flow and vice versa. The formation of a laminar flow requires a significantly greater distance.

Valve which is open when at rest and is closed by actuation for the flow rate. Opposite: Normally closed (NC) valve .