4 m Pump 3 m 8 m 20 m 12 m Using the supplied pump (pump to use.pdf) with a 12.95" impeller, determine the flow rate in GPM. The pipe diameter is 8 cm and the pipe is cast iron. What is the efficiency of the pump at this operating point? How much power must be supplied to the pump? Using NPSH, determine restrictions on the placement of the pump (how close to the 2nd reservoir can it be?) Head, ft 100 Laco 10 Model 4013 FM Series 15 20 25 13- 3 150% T2.95 in 60% 65% 70% 74% 76% 80 189 12:50 in 12.00 in 11:50 in 60 11.00 in 10.50 in 10.00 to 40 20 Curves based on clear water with specific gravity of 1.0 0 100 200 5 bhp 1160 RPM Curve No. 806 Min. Imp. Dia. 10.0 Sizes 5 x 4 x13 30 35 Problems 811 40 45 L/s 50 S 6 - 30 NPSH, At 80% 79% 78% 76% -74% 70% 25 20 20 15 160% 10 50% 10 bhp 7.5 bhp 300 400 Flow, gal/min 500 600 700 800 P11.24 Performance data for a centrifugal pump. (Courtesy of Taco, Inc., Cranston, Rhode Island.) 5 Head, m