Minimum Pressure Tank And Supply Pipe Sizing - Franklin Electric SUBDRIVE UTILITY UT3P Manuel Du Propriétaire

Minimum Pressure Tank and Supply Pipe Sizing

A drive system needs only a small pressure tank to maintain constant pressure, although a larger tank may
be used. If adding a drive to a conventional system with an existing large tank, refer to
Mode Adjustments" on page
The pressure tank pre-charge setting should be 70% of the targeted system pressure. To check the tank's
pre-charge, de-pressurize the water system by opening a tap with the drive off. Measure with a pressure
gauge at the inflation valve and make any necessary adjustments.
Refer to the following recommendations for best performance.
Submersible Pump Applications
Pump Flow Rating
Less than 12 gpm (45.4 lpm)
12 gpm (45.4 lpm) and higher
Surface Pump Applications
Maximum Pump Flow
10 GPM
20 GPM
30 GPM
40 GPM
Minimum Supply Pipe Sizes
The minimum supply pipe inside diameter past the pressure sensor (transducer) should be selected to not
exceed a maximum velocity of 8 feet per second (2.4 m/s) based on the flow rate of the system.
Maximum GPM (lpm)
11.0 (41.6)
19.6 (74.2)
30.6 (115.8)
44.1 (166.9)
78.3 (296.4)
176.3 (667.4)
26.
Minimum Tank Size up to 1 HP
2 gallons (7.6 liters)
4 gallons (15.1 liters)
Minimum Tank Size
2 gallons (7.6 liters)
4 gallons (15.1 liters)
6
gallons (22.7 liters)
8 gallons (30.3 liters)
Minimum Pipe Diameter
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"
INSTALLATION PLANNING
Typical Surface Pressure Boosting Application
"Tank Size and Bump
Minimum Tank Size over 1 HP
4 gallons (15.1 liters)
8 gallons (30.3 liters)
13