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The most common application of a charge pump in hydraulic systems is "charging" a pump in the open circuit (due to improved filling in the priming phase, it can be run at a higher rotation speed) and

Electronic control amplifier for proportional valves ; often installed on a European circuit board . A specific electronic amplifier card is allocated to a specific type of proportional device: valves

Axial circular sealing gap : Gap created when a piston runs inside a bore (e.g. pump pistons, valve control spools in valves). Providing a centric gap is involved, the leakage will depend on the follo

Copying valve

The flow rate in a hydraulic system with a variable pump and appropriate adjustment corresponds to the requirements in accordance with which the adjustment functions. The term impressed, i.e. pre-defi

cf. viscosity

With all hydraulic motors of the vane and piston type that have an odd number of displacement chambers, the smaller and larger section will find themselves within the pressure range on an alternating

Pressure transducer that can measure the absolute pressure . For this purpose the side opposite the pressure to be measured is hermetically sealed as a reference chamber (e.g. with a glass plate or gl

Between the shear stress τ = F/A and the velocity gradients in a moving fluid (Figure D 93) the following relationship applies: The proportionality factor η is called the dynamic viscosity . It is a m

The cumulative efficiency of a filter describes how effective a filter is in retaining solid particles. According to ISO 4572 it is defined by ε x = filter cumulative efficiency for particles larger t