Flow and pressure control
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How can one control the pressure of a liquid while also controlling its flow rate in a pipeline? What type of valve is needed to achieve this function?
It’s impossible to control both at the same time; you need at least two control valves for that. Of course, it’s also possible to use one control valve along with a pressure regulator, which is cheaper； .
It can be controlled by combining a matching cylinder with an automatic pressure regulator; a bypass valve is installed in the matching cylinder
Could you please explain it more clearly? I’m a beginner
There should be automatic control valves with pressure relief
Is it to prevent the evaporation of liquids? Or some other function! Just control the pressure at the outlet end!
It’s just tap water. We need to conduct experiments now, and we require adjustable pressure and flow rates. What you mentioned about controlling the pressure at the outlet seems to involve only pressure control, but the flow rate isn’t controlled, right? Please explain it
By closing the outlet valve, you control the flow rate, and thus the pressure behind the valve decreases, right?
The reflux back to the pump can be controlled, and it seems to work pretty well
What does \"backflow\" mean? Please explain it ?
It’s simple: just ensure that the pressure before the valve through which the liquid is pumped is raised to a level higher than the pressure after the valve. For example, if a pump is used for pumping, then a pump with a higher head capacity should be employed; this way, the pressure of the liquid after the valve can be maintained, while the flow rate is also ensured.