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Minimum Pressure Tank and Supply Pipe Sizing
A VFD system needs only a small pressure tank to maintain constant pressure, although a larger tank may
be used.
•
If adding a drive to a system with an existing large tank, refer to
Position 5)" on page
•
The pressure tank pre-charge setting should be 70% of the targeted system pressure.
NOTE: The included transducer measures up to 200 PSI, ensure that the pressure tank is rated adequately.
Refer to the following recommendations for best performance.
Maximum Pump Flow
10 GPM
20 GPM
30 GPM
40 GPM
Over 40 GPM
For larger flow rates, consult pressure tank manufacturer for tank size selection.
Minimum Supply Pipe Sizes
The minimum supply pipe diameter past the pressure sensor (transducer) should be selected not to exceed
a maximum velocity of 8 feet per second (2.4 m/s) based on the flow rate of the system.
IMPORTANT: Water system piping should be performed by an experienced professional to ensure adequate
flow.
Maximum GPM (lpm)
11.0 (41.6)
19.6 (74.2)
30.6 (115.8)
44.1 (166.9)
78.3 (296.4)
122.4 (463)
176.3 (667)
240.0 (908)
313.3 (1186)
396.6 (1501)
489.6 (1853)
24.
Minimum Tank Size
2 gallons (7.6 liters)
4 gallons (15.1 liters)
4 gallons (15.1 liters)
8 gallons (30.3 liters)
20 gallons (75.7 liters)
Minimum Pipe Diameter
0.75"
1"
1.25"
1.5"
2"
2.5"
3"
3.5"
4"
4.5"
5"
Minimum Pressure Tank and Supply Pipe Sizing
"Bump Mode Configuration (DIP SW1 –
INSTALLATION AND SETUP
13
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