4" Grundfos CU321 Constant Pressure SmartFlo Systems
Featuring Grundfos Stainless Steel 4" Pumps and Motors
The highly efficient, reliable, and proven drive is designed to extend the range of our SmartFlo family of Constant Pressure Systems from ½ hp through 5hp.
Main applications:
- Domestic and light commercial water supply
- Irrigation
- Livestock watering
- Water transfer
SmartFlo CU321 Constant Water Pressure System consists of:
- Compact, efficient, and reliable CU321 variable frequency drive
- Rugged stainless steel pump end and proven, reliable 3-phase 230V motor
- Pressure sensor
- Minimum 4 gallon diaphragm tank
CU321 features the following:
- A complete solution from one manufacturer
- Easy setup – simply select pump model and choose pressure set point
- System design approach – CU321 is calibrated to the Grundfos motor and pump, eliminating doubts about proper pump or motor selection
- Four pump choices – offered in most popular sizes, both 3 and 5hp: 16, 25, 40 and 75gpm
- Matched pump and motor – 3hp pump on 3hp motor and 5hp pump on 5hp motor.
- Respects original operating designs – operates pump and motor within its designed RPM and hp ratings
- Built-in protection features – Soft start, dry run, overload, over/under voltage, sensor alarm
- Wide voltage range – 3hp and 5hp input: single phase 208 – 240VAC
Click here to view the sizing table
| 1PH 3HP CU321 SmartFlo Systems | 1PH 5HP CU321 SmartFlo Systems |
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1PH 3HP 16S30-24 Smartflo System 16S30-24 Performance Graph $2729 |
1PH 5HP 16S50-38 Smartflo System 16S50-38 Performance Graph $3674 |
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1PH 3HP 25S30-15 Smartflo System 25S30-15 Performance Graph $2729 |
1PH 5HP 25S50-26 Smartflo System 25S50-26 Performance Graph $3674 |
|
1PH 3HP 40S30-9 Smartflo System 40S30-9 Performance Graph $2729 |
1PH 5HP 40S50-15 Smartflo System 40S50-15 Performance Graph $3674 |
|
1PH 3HP 75S30-5 Smartflo System 75S30-5 Performance Graph $2729 |
1PH 5H 75S50-8 Smartflo System 75S50-8 Performance Graph $3674 |