Xylem Wastewater (Technical Manual) - Manual (Page 10)

PAGE 10
Wastewater
Goulds Water Technology, Bell & Gossett,
Red Jacket Water Products, CentriPro
Basin Sizing
CALCULATING BASIN SIZE
1. Choosing Diameter
A minimum of 24" is required for simplex. Duplex stations
normally start at 36", but require much larger for larger diam-
eter discharge pumps.
For example: A pump that flows 100 GPM, requires a 2-min-
ute run time. A duplex station with a diameter of 36" holds
4.4 gallons (see Chart A) per inch.
50 GPM x 2 minutes = 100 gallons
100 gallons / 4.4 gallons per inch 22.72" for pump down.
22.72" would be used for (E).
2. Sizing Depth
Inlet and Float Location Basin Sizing Method
1. Top of basin to bottom of the inlet (A) + in.
2. Inlet to "Alarm" float (B) + in.
3. "Alarm" to "Lag" float (C) + in.
4. "Lag" to "On" float (D) + in.
5. Pump down (E) + 17.86 in.
(Note A)
6. Floor of basin to top of pump case + 19.0 in.
(Note B)
Note A = Minimum suggested basin diameter for duplex configuration is 36".
Volume by inch of basin divided by 2 x's pumping rate.
Note B = Most pumps are approximately 19" tall. Pump should remain covered
during pumping.
CHART A
Dimensions Volumes
Diameter Depth Total Gallons
Gallons Per Inch
36 65 1.81
48 84 1.75
24 60 102 1.70
72 118 1.64
84 165 1.96
96 188 1.96
36 110 3.00
48 137 2.85
30 60 169 2.82
72 199 2.76
84 257 3.05
96 294 3.06
36 159 4.41
48 200 4.17
36 60 246 4.10
72 291 4.04
84 370 4.40
96 423 4.40
48 274 5.71
60 339 5.65
42 72 402 5.58
84 504 6.00
96 576 6.00
48 361 7.52
60 446 7.43
48 72 529 7.34
84 658 7.83
96 752 7.83
78 955 12.24
60 84 1028 12.23
96 1175 12.23
78 1375 17.62
72 84 1481 17.63
96 1692 17.63
Finished Floor
A
B
C
D
E
19”
Basin