Originally Posted by stephenm
head pressure by itself is somewhat meaningless but still more important than max discharge. The reason for this is that most actual system flow rates are around 1 to 1.5 GPM, so practically about 1/4 (sometimes even less) of the maximum discharge (max flow rate), so just looking at the Max head pressure on different pumps does give a good idea of which will give the best actual flow rate.
Not really. Max values are meaningless because what matters is how the P/Q curve looks.
Originally Posted by Davron
Does this mean that there isn't any benefit to two pumps vs one like you have with your x2 product if you specify the design instead of repurposing the pump? I think I'm unclear as to the definition of static pressure in this case. Is this the 0 flow maximum lift? If so that is still just a bit more than half of what the x2 puts out. But pumps are all different, so that doesn't necessarily say what it would do at 1.5 gpm, right?
I'm glad you have taken charge of your own destiny by spooling up your own design and fabrication. I'm assuming that you are going to have some trouble meeting the initial demand of the H220 by itself, much less providing stand alone pumps. Do you think you'll get a handle of that by the middle of the year such that you can release the stand-alone? I'd love a second pump in my Switch 810 and if you can keep it quiet like this one, it would be a really good fit and just in time for my drain and fill.
Nope. Calculating the flow of any loop is not something easy. For any give flow you have, you will have a different restriction (restriction goes up with flow). So, the only way to calculate what kind of flow your loop will have would be to cross a P/Q curve from your loops restriction against a P/Q curve of a pump.
Having 2 pumps gives different benefits depending on how you have them.
a) Series. You have double max pressure. If the loop is very restrictive you will have a lot better performance... and, at the same time, you add redundancy to your loop (aka, if one pump dies water won't boil...)
b) Paralel. You have double max flow. If the loop isn't restrictive, you will have better performance. Same as before, you will have redundancy.
At this day and age, I'd get 2 pumps whenever I have a kinda big loop, if anything because of redundancy. At the end of the day, when you are expending like $500 in wcing parts, it would be stupid not to add another $60 for another pump and be totally safe.
Originally Posted by Avonosac
Yea, that is kinda why I'm so excited for this release, I think its going to be a very tight fit to get everything in, but I really wanna see it
The AD2, which was what I was looking at most before I saw this, was just too powerful and noisy. I didn't feel like the 150$ was worth it, for such a small simple loop I wanted to set up.
What?! AD2 is fully PWM capable. So, its as noisy and powerful as you want to make it.