Drive power
Power drawn at the shaft of a hydraulic pump at a specific point in time or under specific load conditions. It differs from the hydraulic power by the sum of the pump losses ( volumetric efficiency, h
State equations
If the alignment of the output variables to the input variables in a transfer element is described by a system of differential equations or differential equations and standard equations, by introducin
Elbow fitting
Fitting , which forms an angle of normally 90° between the connection openings. It is offered as a pipe or screw-in fitting ( pipe screw connections ).
Transmission speed
The number of binary signals transferred over a data channel per unit of time (DIN 19 226 Part 5). At a cycle frequency of 1 kHz, in the case of series data transmission, this results in a transfer of
Flow machines
Collective term for pumps and devices, which work according to the hydrodynamic principle, i.e. in which the velocity element of the flowing fluid is decisive. For pumps, these are the centrifugal pum
Control instruction
The smallest independent unit of a program, which illustrates the work instruction.
Gap extrusion
Property of an elastomer seal to become squeezed behind the seal under the influence of pressure in the sliding gap, causing damage to the seal ( Figure S 65 ). Remedy: Another material back ring made
Signal path
Graphical representation of the transfer of a signal between two or more functional elements or operating materials (DIN 40 719 T 61).
Open-centre position
In the case of three-directional valves, in the centre position, all ports can be connected to one another –– and therefore with the workflow (requires negative overlap).
Closing pressure
Response pressure to close a device under defined conditions (DIN 24 312).