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Reflects the ability of a hydraulic fluid to reduce mechanical wear on moving parts of a hydraulic system which it comes into contact with. To improve the wear protection capacity, wear protection age

Casual term for laying the pipelines necessary for a system. As a rule, it is performed by the assembly operator after a visual inspection during assembly or pre-assembly. In the case of complex syste

Control , in which the signal action is synchronised with a clock signal (DIN 19 237). The clock signal comes from a clock device (clock, clock amplifier). This means that changes to the input signals

Abstract illustration in the form of graphical symbols, which display the function of a fluid device (not its construction design) in accordance with a standard or a key. The symbols were previously k

Adjustment system for double pumps with an equally high flow rate, whose adjustment devices are mechanically or hydraulically coupled and which transport the flows in two different circuits with diffe

In general : Sum of pressure in the operating ports of a (continuously adjustable directional valve, hydraulic motor). For valves : Sum of pressure p A and p B in the operating ports A and B with a co

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

Hydraulic pump , consisting of several single pumps working in series. The aim is to achieve a higher pressure than permitted by the single pump. Sample application: Internal gear pump , which reaches

Element which prevents the axial displacement of a seal in its installation nut. Supporting rings are made primarily of elastic materials and can be loose in the seal or can be vulcanised into the sea

Valves for the control or feedback control of a flow rate. They are therefore used to control the velocity of cylinders and motors. A differentiation is made between: Throttle valves , which are press