A pump pumps water between two large open tanks through 30 m of 20 cm diameter pipe. The pipe contains four regular flanged 90 elbows, a forward flow check valve, and a fully open globe valve. Other minor losses are negligible. Assume the friction factor f-0.02 for the 30 m section of pipe. If the static head (difference in height of fluid surfaces in the two tanks) is 9 m, what type of pump should be used to pump the water at a rate of 6.5 m3 /min? Assume rotational speed n=800 rpm. Component a. Elbows Table 6.1 Loss coefficients for pipe components. K Regular 90, flanged Regular 90, threaded Long radius 90, flanged Long radius 90, threaded Long radius 45, flanged Regular 45, threaded b. 180 return bends 180 return bend, flanged 180 return bend, threaded c. Tees Line flow, flanged Line flow, threaded Branch flow, flanged Branch flow, threaded d. Union, threaded *e. Valves Globe, fully open Angle, fully open Gate, fully open Gate, closed Gate, closed Gate, closed Swing check, forward flow Swing check, backward flow Ball valve, fully open Ball valve, closed Ball valve, closed 0.3 1.5 0.2 0.7 0.2 0.4 0.2 1.5 0.2 0.9 1.0 2.0 0.08 10 2 0.15 0.26 2.1 17 2 00 0.05 5.5 210 IFFU