From Dr Georgi Bankov, who’s been advising a number of teams here in the DIY community:
I studied yesterday all prototypes here : https://docs.google.com/spreadsheets/d/e/2PACX-1vTYAfldxoIiO46VAWH1NlhrwFBn9mguqS2bh1spnLEu4AVVN1cj1vaEm6vOp5Z6UnaAbUwd8dslCXdM/pubhtml
For me this is the most promissing design and the parts are generally available
For me this the right choice and the best compromise between all requirements towards the situation
So, I have a couple of questions to the engeneers. Can this pump with debit 500-600 l/min /DC brush motor/ be controlled effectively in debit range 10-20 l/min?