To determine the actual transfer rate and horsepower required for a selected model pump, the variables shown and described to the left and page bottom may be placed into each performance formula box.
Please click here for help in using our formula calculator.
Two variables that must always be manually keyed into the boxes of the performance formulae are Actual Drive Speed, Nd, and the Differential Pressure, Pd. All other variables may be either hand-typed into the formula, or for best accuracy follow the directions below.
Once all variables are located in the performance formulae boxes, click on the Calculate GPM box and the expected transfer rate is shown. Then, click on the Calculate Horsepower box and the answer is shown.
Smith performance formulae give a very accurate representation of field performance of a selected pump model due to the viscosity changes of the fluid being transferred at various temperatures. A performance curve can easily be drafted by determining the flow rate and horsepower requirement at three different differential pressure points, such curve showing the expected flow rate and horsepower at the differential pressure required.
For Propane/Butane pumps, performance curves are published in Catalogue CP-3, available for download from this site.
For inlet line recommendations, download Manual AL-3
|Model||Rated Transfer Capacity (GPM)||Rated Shaft Speed (RPM)|