Pipe rupture protection
event that the supply line breaks.Burst pipe protection is mainly used in excavators and mobile cranes where the boom or load must not lower in an uncontrolled manner should the line rupture. Pipe rupture
Characteristic curve
the parameter. A linear characteristic curve applies if the relationship between two variables is represented as a straight line. In general, however, relationships tend not to be linear, which means it [...] relationship between the stationary value for the input signal and output signal variable. It is non-linear in general and, as such, is represented graphically in most cases. The linearised functional rel
Directional valve, 3-way valves
In general : Valve with three controlled ports. For directional valves : Valve with inlet, cylinder line, outlet (suitable to control a single action cylinder).
Operating point
transfer function for transfer elements , in particular with non-linear characteristic curves, the coefficients of the equivalent linear equivalent function are dependent on the operating point for which
Serial
bit. For example, a transfer is serial if the information is passed on one after another on the same line. Opposite: Parallel
Equivalent bulk modulus
of the pressure fluid also the elasticity of the surrounding components as well as the connection line between the valve and . The equivalent bulk modulus is not a constant magnitude, but instead a function [...] this relationship is the mostly unavoidable undissolved air content of the oil as well as the non-linear expansion of hoses (Figure E 35) .
Flow rate linearity
Maximum deviation of the average flow rate signal function from the straight line of the average flow rate amplification. Stated as a percentage of the nominal flow rate .
Negative-pulse control
Reversal of a pulse valve by purging (depressurising) the piloting line. Not used very often now, because switching may also occur in the event of an unintentional pressure drop.
Hose stretching
As hoses must be elastic in order to fulfil their task as a moving line connection, consideration must be taken to ensure that they also react elastically to excess pressure from the inside. Hoses for [...] hose and means an increase of the dead volume and a simultaneous reduction of the stiffness of the line ( Figure S 27 ).
Positive-pulse control
Reversal of a pulse valve by supplying air (pressurisation) to the piloting line. Since negative-pulse control is hardly used any more, the term used most often is simply pressure actuation.