Nominal flow rate
under nominal operating conditions. These are the conditions for which a device has been designed based on its application and when not subjected to a load (CETOP RP 100). For continuously adjustable d
Filter size
The required filter size is based on the permissible flow resistance of the oil filter at the nominal flow rate. The selection of the filter size is affected by: The selected filtration grade , The flow
Hydrostatic laws
The technical processes in hydraulics are essentially based on the following basic laws of physics: Pascal's law : (Blaise Pascal, 1623—1662). Every force acting on a stationary fluid generates a pressure [...] same magnitude. This the basic law of hydrostatics . All force and pressure processes in fluids are based on this law. As the hydraulic fluid must be transported from the place it is generated (pump) to the
Single or separate drive for machines
even every cylinder , provided its movements overlap with others, has a dedicated pump with a size based on the highest load speed v k required (Figure E 13) . This means that high speeds require correspondingly
Beta value (β value)
x = 10 μm is standardised. For all other particle sizes the boundary conditions must be selected based on this standard.
Solenoid actuation
Actuation of a fluid-based device by a solenoid with a stroke that is transferred directly to the device and triggers there an actuation (e.g. switching directional valve ) (Figure E 24) . In this way
Hydraulic fluids
fluids can be produced from mineral oil or using renewable materials. They are also referred to as bio-based hydraulic fluids.
Measuring range
the input signal (the measured variable). It is possible to specify different error limits (e.g. based on sections) within the same measuring range (VDI 2600). As far measuring instruments with displays
Relative delivery fluctuation δ
pistons, δ is around twice as high as in the case of an uneven number. The kinematic delivery flow based on the relative delivery function is also responsible for moment fluctuations in hydraulic motors
Reference variable
the control or feedback control is intended to follow with the stipulated dependency (DIN 19 226). Based on this definition, the reference variable is the same as the setpoint . In fact these two terms often