Consider the pump and piping system of Problem 10.50. Determine the volume flow rate and gate valve loss coefficient for the case of two identical pumps installed in parallel.

Data From Problem 10.50

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10.50 Performance data for a pump are H (ft) Q (gpm) 179 176 165 0 500 1000 1500 145 119 84 43 2000 2500 3000 Estimate the delivery when the pump is used to move water between two open reservoirs through 1200 ft of 12-in.-diameter commercial steel pipe containing two 90 elbows and an open gate valve if the elevation increase is 50 ft. Determine the gate valve loss coefficient needed to reduce the volume flow rate by half.