4 If a pump A and B were operating in Parallel lift a What i

4. If a pump A and B were operating in: Parallel. lift? a. What is the flow rate (individually and together) that can be provide 250\' of b. Series. What is the head added in meters when 750 cms flows through the pumps? 5. The pump station configuration for pump A (above) has a sharp edged entrance, gate valve for isolation, a 90° bend and a reducer from a 10 ft. long, 10\" cast iron to a 6\" impeller eye on the suction side of the pump On the discharge side of the pump, the 8 ft, 10 inch cast iron pipe contains a check valve, gate isolation valve and a fully open globe valve. a) b) Compute the net head gain (modified pump curve point) at a flow rate of 4000 gpm. Compute the NPSHA for water at 70F if the pump is 10 feet above the wet well water surface elevation for Q = 4000 gpm. Compare it with the NPSHR.

Solution

4) If parallel then flow rate will be double than the normal for the pump which is together.

If series, Flow rate will be normal but head will be increased to double.