Recent content by help_pls

Ok, but it far from optimal right, due to poor efficiency, possible dmg to the pump etc., I'd be better off throttling the discharge?

So the system curve will shift left-ward depending on how much you close the valve right?

Hi all, I have a question about the effect of partially closing a pump discharge valve on the system curve, wondering if you guys can help me out. Right now I have the yellow pump curve and the orange 2 inch system curve , producing around 120 gpm against around 110 ft of head. If I expand...

Thank you so much! I think I got it.

Hi all, I am trying to wrap my head around how much air is needed to transfer liquid from one tank to another tank. Here is a sketch of the problem The valves at the bottom of the first tank opens up, and air is transferred to the first vessel to transfer the liquid completely to the...

I don't know if you can see the picture so here is the imgur url! http://imgur.com/a/Wsotz

Hi all, I am a student trying to figure out the system curve for a pipe line system. I know how to calculate friction loss for just one flow, but not for a system of branched flow! I read a short article online saying that for parallel pipes the friction head is the same for all branches, so...

Ok, thank you!

Hi all, I am trying to design a open circuit wind tunnel, and I've got to the point where a fan should be selected. However, I am not familiar with fans at all, so I am wondering if you could help me! My understanding is that the fan selection process is quite similar to the pump selection...