By South Bend Lathe Works
A reprinted e-book from the massive number of small manuals that have been written by way of South Bend.
34 invaluable specialist targeted pre-computer computing device store plans incorporated, starting from punches and hammers to a grinder and a small petrol engine.
Many Machinist initiatives, would receive advantages from interpreting this booklet.
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Sample text
A lower value. Therefore, in selecting the driver motor size, the pump power requirement over the entire capacity range must be determined, rather than that at the maximum capacity. 7) where K is a constant. 7), we can rewrite the BHP equation as follows: BHP Q(a 0 a1Q a 2 Q 2 )Sg/[K (b 0 b1Q b2 Q 2 )] 36 Working Guide to Pumps and Pumping Stations By suitable mathematical manipulation, we can reduce this equation to a simpler equation as follows: BHP (c 0 c1Q c 2 Q 2 )Sg where c0, c1, and c2 are constants to be determined from the pump curve data.
What size electric motor driver should be selected? 10/kWh. 5), we calculate the BHP1 through BHP7 for the preceding seven sets of data. 325) 1123 (rounded up) Repeating the preceding calculations for the remaining six sets of H, Q, and E values, we can develop the following data set for the BHP curve (note that all BHP values have been rounded off to the nearest whole number): Q gpm 1000 2000 3000 4000 5000 6000 7000 BHP 1123 1403 1696 2020 2334 2574 2720 The BHP versus capacity Q curve can now be plotted from the preceding data.
1 A 5-stage centrifugal pump has the following H-Q and E-Q data taken from the pump curve with water as the liquid pumped.