Need to find out if one can control the level in the Vessel and the flow from the pump (downstream the GFUs/Vessel) independently.

These issues are:

4 vessels has a level control valves on the main suction side of header to the transfer pumps.

and there exist no surge tank transfer pumps discharge control to keep the pumps from running off their curves.

I am thinking of installing a flow control upstream the pump and a Flow Control Valve downstream the pump to control the flow and protect the pump from running off its curve, this will be independent of the Level control since we have many vessels feeding the pumps.

Just want to find out if this will work

 

Its hard to say from your description. So the answer is "it depends".

If you have 4 storage vessels and you don't care what level is in each vessel, then yes, this will likely work reasonably easily.

Alternatively, if the level of each vessel must be tightly controlled, and you don't care what downstream flow you get, again, yes, this will probably work quite easily.

However, if you want Tight level control in the vessels AND Tight control over the flows, then No, this isn't going to work.

The Level in each of the vessels and the input and output flows are tightly connected. You must have some degree of freedom in one or the other in order to be able to control them both at the same time. The more that you can allow one measurement to change, the easier it will be to control the others. Ultimately you will need to understand what compromises you have to make or can live with to get this to work. Ultimately, what you are trying to do can be made to work - but how well it works will depend on what your control requirements are and how well designed, implemented and tuned your final solution is.

Rob
www[.]lymac.co.nz