Hi all, about to set up a flow loop in our garage that will be mixing oil and water for some water cut testing. In the past we've basically put a hand valve right after the pump to control rate (ghetto). This time we're going to have one pump per phase. We were going to use control valves behind each pump to control individual rates, but now that I'm getting more familiar with drives, thinking I'll put a small VFD on each pump instead and control rate that way. The VFDs are much cheaper than the control valves for the size pumps we're using.
Anyway, wondering if we should still have valves in place or if I should just rely solely on the VFDs to control rate for each phase. Any opinions from previous experiences would be appreciated.
Anyway, wondering if we should still have valves in place or if I should just rely solely on the VFDs to control rate for each phase. Any opinions from previous experiences would be appreciated.