When Cooling Towers with common supply and return are installed in parallel, special consideration should be given to the piping design in order to maintain balanced water flow through each tower. If the levels are not equal, one tower could overflow while the other tower will draw air through the circulating pump. Equalizing lines serve to correct a difference between water levels that may develop during operation.
|
Flow to Tower (gpm)
|
Equalizer Size (in)
|
|
Up to 120
|
3”
|
|
121-240
|
4”
|
|
241-630
|
6”
|
|
631-1150
|
8”
|
|
1150-1900
|
10”
|
|
1901-2800
|
12”
|
|
2801-3500
|
14
|
|
3501-3800
|
16”
|
|
3801-5600
|
18”
|
