This document contains operating data for a GMF feed pump including: - The pump operates at a flow rate of 1519 L/s. - The maximum frequency is 50 Hz and maximum speed is 592 rpm. - It provides a static head of 15 m to a discharge pipe that is 120 m long with a diameter of 2 m. - The total head required is 15.047 m when operating at 33 Hz (390.72 rpm) and 151.6 L/s flow rate. - Charts show the pump curves at different frequencies and the system curve.

1. GMF
Operating point
Q 1519 L/s
CCT GMF Feed pump H 19.8 m
Max freq 50 Hz
Max speed 592 rpm
a -0.00000239
Input frequency 33 Hz b -0.00472942
Pump speed 390.72 rpm c 32.27508198
Flow 151.60 L/s b1 -0.00000842
c1 0.00010219
Static head 15 m
Discharge pipe diameter 2 m
Velocity 0.05 m/s
Length of discharge pipe 120 m
c = Hazen-Williams roughness constant 140
Friction head loss per 100 m pipe length 0.000 m Hazen-William equation
Friction head loss over entire discharge pipe 0.000 m
Coefficient for other head loss 20
Head loss other than friction 0.05 m
50 Hz 40 Hz 34 Hz 27 Hz Total head required 15.047 m
592 rpm 473.6 rpm 402.56 rpm 319.68 rpm Flow at total head 151.60 L/s
Q H Q H Q H Q H Q H
100.00 35.29 100.00 22.50 100.00 16.20 100.00 10.15 100.00 15.02
150.00 35.01 150.00 22.27 150.00 16.00 150.00 9.99 150.00 15.05
200.00 34.72 200.00 22.03 200.00 15.79 200.00 9.81 200.00 15.08
300.00 34.10 300.00 21.51 300.00 15.33 400.00 8.98 400.00 15.33
400.00 33.44 400.00 20.94 400.00 14.82 600.00 7.97 600.00 15.73
500.00 32.73 500.00 20.33 500.00 14.27 800.00 6.76 800.00 16.30
750.00 30.73 750.00 18.59 750.00 12.68 1000.00 5.37 1000.00 17.03
1000.00 28.44 1000.00 16.55 1000.00 10.78 1200.00 3.78 1400.00 18.98
1250.00 25.86 1250.00 14.21 1200.00 9.06 1300.00 2.91 1600.00 20.20
1519.00 22.74 1500.00 11.57 1400.00 7.14 1400.00 2.00 1800.00 21.58
2000.00 16.30 1800.00 8.01 1600.00 5.03 1500.00 1.04 2000.00 23.12
H Q H Q H Q H Q
31.57 161 31.57 158 31.56 151 31.56 154
29.55 415 29.56 467 29.56 446 29.56 437
27.57 676 27.59 725 27.59 725 27.87 716
25.61 919 25.63 974 25.63 982 25.62 954
23.65 1116 23.67 1154 23.66 1136 23.66 1130
21.68 1268 21.71 1313 21.7 1296 21.69 1281
19.78 1501 19.8 1529 19.79 1517 19.8 1519
19.84 1666 17.84 1673 17.84 1667 17.84 1664
15.89 1798 15.91 1829 15.9 1814 15.91 1818
13.96 1936 13.98 1963 13.97 1949 13.96 1947
12.00 2041 12.03 2071 12.02 2063 12.02 2065
a -0.00000235 a -0.00000244 a -0.00000246 a -0.00000234
b -0.00466 b -0.00460 b -0.00461 b -0.00489
c 32.02 c 32.29 c 32.23 c 32.31
H Q H Q H Q H Q
31.57 185 31.56 149 31.57 162 31.56 157
29.56 448 29.56 458 29.57 473 29.56 450
27.59 728 27.58 718 27.59 735 27.59 724
25.63 961 25.63 964 25.64 989 25.64 989
23.66 1135 23.66 1143 23.67 1158 23.66 1143
21.69 1289 21.7 1305 21.72 1327 21.7 1297
19.8 1524 19.79 1513 19.8 1533 19.79 1503
17.84 1665 17.84 1662 17.85 1686 17.84 1665
15.91 1824 15.91 1820 15.92 1841 15.9 1810
13.97 1960 13.97 1952 13.99 1977 13.96 1946
12.03 2072 12.02 2061 12.04 2089 12.01 2058
a -0.00000218 a -0.00000243 a -0.00000239 a -0.00000251
b -0.00522 b -0.00468 b -0.00461 b -0.00458
c 32.50 c 32.25 c 32.33 c 32.26
System curve
Pump 1 Pump 2 Pump 3 Pump 4
Pump 5 Pump 6 Pump 7 Pump 8
25
34.85
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
0 200 400 600 800 1000 1200 1400 1600 1800 2000
H(m)
Q (L/s)
GMF Feed pump curves
50
40
34
27
System curve
H = aQ2 + bQ + C
= aQ2 + b1NQ + c1N2