H4U.app Pressure Flow
The "H4U.app pQ" software module controls the pressure (p) and the volume flow (Q) of a hydraulic system. It is used for the control of fixed displacement and variable displacement pumps and enables various flexible and hardware-independent control concepts to be implemented in your existing automation environment flexibly.
![](https://assets.new.siemens.com/siemens/assets/api/uuid:57569166-69f2-4c5d-b83f-1d5ec811f13e/width:100/quality:low/Bosch-Rexroth-H4U-app-pQ.jpg)
The "H4U.app pQ" software module controls the pressure (p) and the volume flow (Q) of a hydraulic system. It is used for the control of fixed displacement and variable displacement pumps and enables various flexible and hardware-independent control concepts to be implemented in your existing automation environment flexibly.