Quanzhou Ausenist Technology Co., Ltd Three-Phase Centrifugal Pump VFD for Flow Control
A three-phase centrifugal pump VFD changes motor speed to regulate flow or pressure. Compared with throttling valves, speed control can reduce energy use and mechanical stress when the pump often runs below full demand.
Recommended Configuration
| Item | Reference Selection |
|---|---|
| Pump | Centrifugal water pump |
| Motor | Three-phase induction motor |
| Control | Manual speed, PID pressure or flow control |
| Input | Match site supply voltage |
| Protection | Overload, dry-run and overpressure protection |
| VFD | AUSENIST general pump VFD selected by current |
What Must Be Confirmed?
- Motor rated voltage, current, power and frequency.
- Pump curve and expected operating point.
- Required flow range and pressure limit.
- Input power supply and cabinet environment.
- Whether bypass or local manual control is needed.
Selection Logic
Select the VFD according to motor current and application load. For centrifugal pumps, reducing speed can significantly reduce power demand, but minimum speed must still maintain motor cooling and process requirements.
Common Mistakes
- Oversizing the pump and using the VFD to hide the problem.
- Running too slowly without checking cooling and flow.
- Ignoring vibration at certain speeds.
- Selecting the drive only by motor kW.
AUSENIST Solution
AUSENIST YS620 and YS820 drives can be used for centrifugal pump speed control, pressure control and cabinet integration. Final model selection should be based on the motor nameplate current.
FAQ
Can a VFD replace a throttling valve?
Often yes, but the pump curve and process control requirement should be checked.
Does lower speed always save energy?
For centrifugal pumps, lower speed usually reduces energy use when flow demand is lower.
Is PID required?
PID is needed when the system must automatically hold pressure or flow.
Related AUSENIST Pages
Send AUSENIST your motor nameplate and pump curve for a suitable centrifugal pump VFD selection.