I was hoping to get some confirmation on some minor pressure loss calculations I am doing, seeing as how I am getting wildly different values depending on whether I try to use the minor loss coefficient, or the equivalent length method.

The minor loss system components are:
5 threaded, line flow tees
4 threaded, 90 degree elbows
2 fully open ball valves

I was using this reference from the Engineering Toolbox:
I'm not sure if the correct way is simply to add the minor loss coefficients in order to get a total coefficient value, but that was the approach I used... I came up with a coefficient of 10.6.

I've attached a copy of the spreadsheet I am using for my calculations, so you can see all the values I am using.
Here is a copy of the link:
Any confirmation on either of these calculations, or maybe a helpful link with reliable information or a detailed example,would be very helpful.Chemical pumps

2011-06-09

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