A system for testing variable-output pumps consists of the pump, four standard elbows, and an open gate valve forming a closed circuit as shown. The circuit is to absorb the energy added by the pump. The tubing is \(75-\mathrm{mm}\)-diameter cast iron, and the total length of the circuit is \(20 \mathrm{~m}\). Plot the pressure difference required from the pump for water flow rates \(Q\) ranging from \(0.01 \mathrm{~m}^{3} / \mathrm{s}\) to \(0.06 \mathrm{~m}^{3} / \mathrm{s}\).

Transcribed Image Text:

Pump Gate Valve P8.96