Page 95 - HVAC Pump Handbook

Rishel_CH04.qxd 20/4/06 6:01 PM Page 92

Basics of Pump Design
Basics of Pump Design
92 HVAC Pumps and Their Performance

Not here
Pump efficiencies – % Pumps must operate here
200
20%
180 30 40
160 50 60 70 74
140 77 80 82 84 85 86
Pump head—FT 120 85 84 82 80 77 Not here
100
80
59%
60 69
40
20
0
0 200 400 600 800 1000 1200 1400 1600
Pump flow—GPM
a. Typical pump head—flow curve for one pump size.

200
150
100
80
60
Pump head—FT 40

20

10
6
4
10 20 40 60 80 100 200 400 800 1000 2000 3000 4000 5000

Pump flow—GPM
b. Family of pump head—flow curves.
Figure 4.1 Typical pump head-flow curves.

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