HydraCALC has a special tool to help you figure out where in your system losses are occuring. The Graphical Pressure Display (GPD) is that tool. In order to use it, one extra step is needed - you need to fill in the column named Input Type
This column specifies the role of each pipe in the system. It does not affect the calculation in any way. also, it is automatically filled in by the AutoCalc process and it is also filled in if you bring in the job from HydraCALC-Sizer. The Num. of Hds. column does not need to be filled out.
After a calc is run, pick the GPD button to see the tool.
This tool shows exactly where the losses occur in your system. Note the color coded relationship between the graph and the individual items listed at left. In this case, say we needed a 10 pound cushion. With only a 3 pound cushion right now, it would not make sense to increase the riser nipple size, since they are only losing 1.97 pounds, total.
Another special feature of this tool is the ability to change items in your input directly from here. To change the K-Factors of all the heads, or to simply see if changing them will help, hover over the E.H.Press (End Head Pressure) item at left and click on it. This will bring up a list of available K-Factors. To see how this part works, refer to this K-Factor Analysis post, which previously addressed that.
Comments