Quote:
Originally posted by m3_arun
how bout a white-water block anda chevette heater core with 5/8id tubing (what im planning for my system).
|
I think you'd find that there's minimal difference between a 1/2" and 5/8" system for flow rates less than about 12lpm if the tubing length is less than a few meters in total.
I'm not familiar with the Chevette heater-core, but I'll assume it has roughly the same flow resistance as the heater-core I'm using.
White Water + Heatercore in a 1/2" system gives
around 1.0m of head loss at 5.0lpm, and
around 4.0m of head loss at 10.0lpm. I say "around" 'cos I'm just back-extrapolating from the PQ curves of the pumps that I'm using.
Here's a graph of Iwaki PQ curves (note - you want to be looking at the USA 60Hz graphs)
So with a US version of the Iwaki MD20-RZ this would translate to roughly 9.5lpm flow rate.
With an Iwaki MD20-R this would give roughly 9.0lpm.
With an Iwaki MD20-RX this would result in roughly 7.5lpm
So clearly the RZ is the better pump here.
For the MD30 series:
MD30-RZ -> ~11.5lpm
MD30-R -> ~10.5lpm
MD30-RX -> ~9.5lpm
I assumed that you were looking at Iwaki pumps from your earlier posts.