Product Manual

Sizing and selection
SQ, SQE, CU 331, and SP
5
17
5. Sizing and selection
System sizing guide
Step 1
Calculate minimum head requirements at no flow conditions:
H
max
(required) = dynamic head + system pressure (in feet) + above grade elevation + friction loss
Step 2
Select pump from chart as follows:
• Choose model family based on the desired flow rate
(i.e. 15SQE for a flow rate of 15 gpm)
• Select the first model with a value in Column 2
greater than the H
max
calculated in Step 1 (For
example: the choice for a 22 gpm model with an
H
max
of 140 ft would be the 22SQE-160).
• Double check your selection in the performance
curves; see SQ, SQE curve charts on page 19.
Fig. 14 Recommended sizing
Note: All calculated head requirements must lie
between the selected pump models minimum and
maximum speed curves.
System sizing matrix
Column 1 Column 2
Pump type
Model B
Shutoff head (0 gpm)
@ 3000 rpm
min. speed
Head @ rated gpm
@ 10700 rpm
max. speed
TDH [feet] TDH [feet]
5SQE-90 11 86
5SQE-140 17 131
5SQE-180 22 177
5SQE-230 28 222
5SQE-270 34 270
5SQE-320 39 315
5SQE-360 45 360
5SQE-410 51 405
5SQE-450 56 450
10SQE-110 12 105
10SQE-160 17 164
10SQE-200 23 215
10SQE-240 29 267
10SQE-290 34 328
10SQE-330 40 390
15SQE-70 10 75
15SQE-110 14 123
15SQE-150 19 164
15SQE-180 24 205
15SQE-220 29 246
15SQE-250 33 287
15SQE-290 38 328
22SQE-40 5 36
22SQE-80 9 77
22SQE-120 14 117
22SQE-160 18 159
22SQE-190 23 200
22SQE-220 27 240
30SQE-40 5 33
30SQE-90 11 82
30SQE-130 16 126
TM01 8547 0400
Pump curve
at 10,700 ft
Pump curve
at 3,000 rpm
Max. head at rated flow
Max. head at no flow