Quanzhou Ausenist Technology Co., Ltd Booster Pump VFD with PID Pressure Sensor Feedback
A booster pump VFD uses pressure sensor feedback to control motor speed automatically. The PID loop compares actual pressure with the setpoint, then increases or reduces pump speed to keep water pressure stable.
Recommended Configuration
| Item | Reference Selection |
|---|---|
| Pump | Vertical multistage booster pump |
| Sensor | 4-20mA pressure transmitter |
| Control | Built-in PID pressure control |
| Setpoint | Based on building pressure demand |
| Functions | Sleep, wake, dry-run and fault protection |
| VFD | AUSENIST pump VFD selected by output current |
What Must Be Confirmed?
- Pressure transmitter range and wiring method.
- Target pressure and maximum safe pipe pressure.
- Motor current, voltage and frequency.
- Minimum pump speed and cooling requirement.
- Sleep frequency and wake pressure difference.
Selection Logic
The pressure transmitter should cover the working range without being too large. A 0-10 bar sensor is not ideal for every building. PID gain, integral time, sleep frequency and wake threshold should be tuned on site to avoid pressure oscillation.
Common Mistakes
- Using the wrong sensor signal type.
- Setting the pressure target above pump capability.
- Tuning PID before air is removed from the system.
- Making sleep pressure too close to the running setpoint.
AUSENIST Solution
AUSENIST can provide VFD selection and basic PID parameter guidance for booster pump panels. The drive can be supplied for OEM installation or retrofit projects.
FAQ
Is 4-20mA better than 0-10V?
4-20mA is usually preferred for industrial pump sites because it resists noise better.
Why does pressure oscillate?
Common causes include aggressive PID settings, wrong sensor range or unstable pipe flow.
Can the VFD stop automatically at low demand?
Yes. Sleep and wake functions can reduce unnecessary running.
Related AUSENIST Pages
Send AUSENIST your pressure sensor range and pump nameplate for PID setup support.