Figure P4.41 shows a system curve overlaid on a set of Bell & Gossett Series e-1531 Model 4x4x7B at 3550 rpm pump curves. The flow requirement for the system is 150 m3/h.

a. Specify the pump’s impeller diameter for this application For the impeller size specified in part (a), determine:

b. The capacity (m3/h) and head (m) of the pump/pipe system?

c. The power input to the pump (kW)

d. The hydraulic power input to the fluid (kW)

Transcribed Image Text:

Total head 75 60 45 250- 200-7" O.L 150- 30 100- 15 50 0 0 6.5" 6" 5.5" 5" Series e-80 200 50 51% 58% -65% 400 70% 100 Capacity FIGURE P4.41 System curve overlaid on pump performance curves. 74% 76% 77% 600 77.5% 65% 15HP 150 Bell & Gossett 4 x 4 x 7B 3550 RPM 77% 76% 20HP 74% 25HP 800 70% 40HP 30HP NPSHr Date: 7/31/2015 200 1000 NPSHr (ft) (M) 60 0 15 10 5 0 (GPM) (M/H)