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The displacement units in a hydrostatic displacement machine (pistons or rigid vanes) are supported by a cam (eccentric) in an eccentric position on the shaft. The size of the stroke determines the le

Pressure difference between the inlet and outlet on the filter (test standard ISO 3968). The initial pressure difference is a key parameter for the design of a filter. The is not a constant parameter

Due to the high flow forces pilot-controlled directional valves for high flow rates are not returned with springs but with hydraulic pressure to the centre position and centred there. This action is a

Illustration of the states of the signal element (as signal inputs) and the (as signal outputs) of a system. In doing so, the changes or specifications which are used to trigger or end a process cycle

When the input signal changes, the output signal switches in a single, unambiguous move from one signal state to the other (DIN 19 237).

Assembly option for hydraulic valves whereby the required valves for a function — e.g. directional valve, flow valves , high response proportional valves are assembled on top of each other on a base p

Controller concepts

Control unit of a machine tool, which only issues an output signal if it is actuated with both hands simultaneously. Two-hand controls are mandatory for manually operated presses.

If the oil in a system is intended to remain practically free from air (e.g. in aircraft hydraulics), the entire circuit must be placed under a slight excess pressure (approx. 0.3-0.4 bar). This happe

Only for continuously adjustable valves: Degree of deviation of the average flow rate signal transfer factors of the positive and negative signal range. It is determined using the difference of both a