Product Overview

The Single-Pump Variable Frequency Pump Unit is an intelligent variable frequency water supply unit designed for energy-efficient pressure boosting and stable water delivery applications. The unit integrates a single centrifugal pump with a variable frequency drive (VFD) and an intelligent control system that automatically adjusts pump speed based on real-time water demand, providing stable pressure output while minimising energy consumption.

The intelligent hibernation function automatically stops the pump when water demand drops below a threshold, further reducing energy consumption. Depending on regional terminology, it may also be referred to as a VFD Single-Pump Unit, Variable Frequency Water Supply Unit, Single-Pump Variable Frequency Pump Unit or Variable Frequency Water Supply Equipment.

Key Features

• Intelligent variable frequency control automatically adjusts pump speed based on real-time water demand
• Intelligent hibernation function stops the pump when water demand drops below a threshold, reducing energy consumption
• High operating efficiency with optimised hydraulic design and VFD speed regulation
• Stable water supply pressure with minimal pressure fluctuations
• Simple and rational structural design with compact footprint
• Straightforward installation and commissioning procedures

Applications

• Temporary construction site water supply
• Industrial water circulation systems
• Water treatment plant water supply and pressurisation
• Cooling system water supply and circulation
• Air conditioning water system pressure boosting
• Small to medium building water supply and pressure boosting

Customer Benefits

Intelligent Energy Saving

The variable frequency drive automatically adjusts pump speed based on real-time water demand, reducing energy consumption by 20-50% compared to traditional direct-on-line pump systems. The intelligent hibernation function further reduces energy consumption during low-demand periods.

Stable Water Supply Pressure

The VFD-based control system continuously monitors system pressure and automatically adjusts pump speed to maintain the required pressure, eliminating pressure fluctuations and ensuring consistent water supply to all endpoints.

Simple and Space-Saving Design

The single-pump configuration and rational structural layout provide a compact footprint, making the unit suitable for installations with limited pump room space.

Easy Installation

The straightforward structural design and pre-assembled configuration simplify installation and commissioning procedures, reducing installation time and costs.

Extended Equipment Service Life

The soft-start capability of the variable frequency drive eliminates the mechanical stress associated with direct-on-line starting, reducing pump and motor wear and extending equipment service life.

Wide Operating Range

With flow rates from 2 to 200 m3/h and heads from 10 to 140 m, the unit covers a broad spectrum of water supply and circulation requirements.

Technical Specifications

Parameter	Specification
Product Type	Single-pump variable frequency pump unit
Flow Rate	2-200 m3/h
Head	10-140 m
Motor Power	0.55-45 kW
Rotational Speed	2900 r/min (variable via VFD)
Control Mode	Automatic variable frequency with intelligent hibernation

Selection Guidance

To select the appropriate single-pump variable frequency unit, please provide the following information:

• Required flow rate (m3/h)
• Required system pressure (MPa or bar)
• Available voltage and frequency
• Installation space constraints
• Operating conditions and duty cycle

Final model selection should be confirmed according to the actual system requirements and project conditions.

Installation and Maintenance

Installation Guidance

The unit should be installed on a level, stable foundation with adequate clearance for inspection and maintenance. The inlet and outlet piping must be properly supported to prevent load transfer to the pump connections. Electrical connections must be made by qualified personnel.

Pre-Start Inspection

Before commissioning, confirm the following:

• Unit is securely mounted and level
• Inlet and outlet piping connections are complete and leak-free
• Electrical connections are correct and terminals are secure
• VFD parameter settings are configured for the required system pressure
• Intelligent hibernation threshold is correctly set

Routine Maintenance

Regular inspection should include:

• Checking VFD parameter settings and fault history
• Monitoring pump performance and pressure output
• Inspecting mechanical seals for leakage
• Verifying intelligent hibernation function
• Inspecting all piping connections for signs of leakage

Available Configurations

• Flow rates from 2 to 200 m3/h
• Heads from 10 to 140 m
• Motor powers from 0.55 to 45 kW
• Automatic variable frequency control with intelligent hibernation
• Integrated pressure transmitter and VFD control panel

FAQs

What is a single-pump variable frequency pump unit?

It is an intelligent water supply unit integrating a single centrifugal pump with a variable frequency drive and intelligent control system that automatically adjusts pump speed based on real-time water demand.

What is the flow range?

The unit offers flow rates from 2 to 200 m3/h, suitable for small to medium water supply applications.

What is the head range?

Available heads range from 10 to 140 m.

What is intelligent hibernation?

Intelligent hibernation automatically stops the pump when water demand drops below a threshold, reducing energy consumption during low-demand periods such as nighttime.

Where can this unit be used?

It is suitable for temporary construction site water supply, industrial water circulation, water treatment plant supply, cooling system supply, air conditioning water systems and small to medium building water supply.

How much energy can be saved?

Typical energy savings of 20-50% compared to traditional direct-on-line pump systems, depending on the system load profile and operating hours.

Contact Chaodun

For product selection, technical data, performance information or project quotations, please contact Shanghai Chaodun Machinery Manufacturing Group Co., Ltd.

Website: https://chaodunpump.com

Email: Suzion@chaodunpump.com

WhatsApp: +44 751 8050 473