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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.

Transfer elements

Device used to visualise and record the course of physical processes which change over time, and particularly those involving oscillation. The following distinction is made in terms of functionality:

Pump direction switching

Behaviour of a binary element or circuit associated with a stable state whereby a corresponding signal change at the input is needed to take the element out if its stable state for a specific period o

Hydraulic spring constant

Pressure-reducing valve

that has the task of adjusting the velocity in a system as a controlled variable as accurately as possible to a setpoint . For this purpose the actual velocity can be measured via a velocity transduce

proportional valve pilot-controlled plug-in valve that, unlike the 2-way plug-in valves permits, due to its 3rd port, the control of a single acting cylinder in the feed and reflux and if necessary, a

A distinction is made between analogue and digital processes ( Figure W 6 ). In analogue position measurement processes, the resistance position measurement (with potentiometer) is commonly used for l