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What is a centrifugal water pump?

A centrifugal water pump is a type of pump that operates based on centrifugal force to draw in and discharge water. When the motor rotates, the impeller generates a thrust force that causes water to move continuously from the pump center outward, creating stable pressure and water flow.

This is a widely used water pump today thanks to its simple design, ease of operation, high durability, and low maintenance. It is commonly applied in residential, agricultural, water supply and drainage systems, and many other industrial fields.

What is a centrifugal water pump
What is a centrifugal water pump

Structure of a centrifugal water pump

A centrifugal water pump is designed with multiple components working together to create continuous water suction and discharge. Basically, the pump structure consists of the exterior casing and the internal operating details.

  • Pump head: The outer casing of the pump chamber, usually made of cast iron or stainless steel to increase rigidity and pressure resistance. This component protects internal parts and guides the water flow during operation.
  • Electric motor: This component generates rotational movement for the pump. The pump motor can use 1-phase or 3-phase electricity depending on usage requirements, transmitting power to the pump shaft and impeller to create water pressure.
  • Impeller: The most important part of the centrifugal water pump. When rotating, the impeller creates centrifugal force that draws in water and discharges it outward at high pressure. The impeller is typically made of cast iron, stainless steel, or bronze to enhance wear resistance.
  • Pump shaft: Responsible for transmitting motion from the motor to the impeller. The shaft is usually made of alloy steel or stainless steel to ensure rigidity and durability during continuous operation.
  • Suction eye: The location where water is drawn into the pump chamber before passing through the impeller. This component helps create a stable flow for the entire system.
  • Suction pipe and discharge pipe: This system guides water from the source into the pump and delivers it to the required location. Depending on the capacity and application, pipe dimensions will vary.
  • Mechanical seal: These supporting components help the pump operate stably, limit water leakage, and reduce friction during the rotation of the pump shaft.
Centrifugal pump structure
Centrifugal pump structure

Operating principle of a centrifugal pump

A centrifugal pump operates based on the principle of generating centrifugal force to draw in and push water. When the pump motor starts, the pump shaft rotates and drives the impeller to move at high speed inside the pump chamber. During rotation, water is drawn into the center of the impeller through the suction eye. Under the action of centrifugal force, water is thrown out to the outer edge of the impeller and moves into the discharge chamber with higher pressure. This process takes place continuously, creating a stable flow to transport water from the storage source to the required location. Depending on the impeller design, motor capacity, and piping system, the water flow rate and pressure will vary.

Classification of centrifugal water pumps

Classification by electrical phase

1-phase centrifugal water pump: Uses 220V household power supply, usually installed for households, rental housing, small farms, or medium-scale water supply systems. This pump series has the advantages of ease of use, low investment cost, and convenience during installation.

1-phase centrifugal water pump
1-phase centrifugal water pump

3-phase centrifugal water pump: Operates on a 380V industrial power supply, suitable for workshops, production systems, agricultural irrigation, or projects requiring continuous operation with large flow rates. This pump series generally offers more powerful and stable performance.

3-phase centrifugal water pump
3-phase centrifugal water pump

Classification by capacity

Centrifugal water pump under 3.7kW: This is the small and medium capacity group, suitable for domestic water supply, plant watering, pond water pumping, or small-scale cooling systems. The pump has the advantages of power saving and easy maintenance.

Centrifugal water pump under 3.7kW
Centrifugal water pump under 3.7kW

Centrifugal water pump over 3.7kW: A large-capacity pump series specialized for industrial use, water supply and drainage systems, firefighting, factory cooling, or large-area irrigation. The equipment is capable of operating with higher pressure and flow rates.

Centrifugal water pump over 3.7kW
Centrifugal water pump over 3.7kW

Classification by flow rate

Centrifugal water pump under 50m3/h: Suitable for residential water supply systems, small and medium farms, or applications that do not require excessively large water flow rates. This is a fairly popular pump series today.

Centrifugal water pump under 50m3/h
Centrifugal water pump under 50m3/h

Centrifugal water pump over 50m3/h: Commonly used in infrastructure projects, industrial water supply systems, water treatment, or areas requiring continuous transfer of large water volumes over long periods.

Centrifugal water pump over 50m3/h
Centrifugal water pump over 50m3/h

Centrifugal water pump price list at Thanh Thai Motor

Below is the centrifugal water pump price updated in 10/2026 at Thanh Thai Motor for your convenience in referencing, comparing, and selecting products that fit your usage needs.

Notes when using a centrifugal pump

Before operation, ensure that the pump is fully primed with water to avoid dry running, which causes overheating and damages the impeller. At the same time, check that the water supply source is stable for the pump to operate more efficiently.

During use, it is necessary to monitor the inlet and outlet pressures of the system, avoiding letting the pump operate beyond the allowable pressure limit. In addition, suction and discharge pipes should also be checked regularly to limit blockages or back pressure that affect the pump’s lifespan.

Users should also periodically inspect components such as the pump shaft, bearings, impeller, and motor to detect early signs of wear or damage. Regular maintenance, machine cleaning, and timely oil changes will help the pump operate stably and durably.

Additionally, do not use a centrifugal pump for liquids with high viscosity or containing too many solid sediments, as this can easily cause clogging and reduce the machine’s operating efficiency.

You can visit the video compilation page under the water pump video category to view details of each product currently being traded and technical instructions performed by the Thanh Thai Motor team.

Frequently asked questions about centrifugal pumps [FAQ]

What should be noted when choosing a centrifugal water pump?

Users should pay attention to water flow rate, head, suction depth, motor power, and operating environment to select the right pump type.

Can a centrifugal pump run continuously?

Many centrifugal pump lines are designed for long-term continuous operation. However, a stable water source and proper cooling system must be ensured to avoid motor overload.

Does a centrifugal pump make loud noise?

When operating correctly according to technical guidelines, the centrifugal pump operates relatively stably and is not excessively noisy. However, if there is shaft misalignment, dry bearings, or cavitation, the noise level can increase significantly.

Máy bơm nước 1 pha công suất 1.1kW 1.5Hp chính hãng
Centrifugal1-Phase1.1kW - 1.5HP46m3/h
From 2.300.000₫
Máy bơm nước 1 pha công suất 0.37kW 0.5Hp chính hãng
Centrifugal 1-Phase 0.37kW - 0.5Hp 16 m3/h
From 1.300.000₫
Máy bơm nước 1 pha công suất 0.55kW 0.75Hp chính hãng
Centrifugal1-Phase0.55kW - 0.75HP21m3/h
From 1.700.000₫
Máy bơm nước 1 pha công suất 0.75kW 1Hp chính hãng
Centrifugal1-Phase0.75kW - 1HP20.5m3/h
From 1.800.000₫
Máy bơm nước 1 pha 1.5kW 2Hp chính hãng
Centrifugal1-Phase1.5kW - 2Hp54m³/h
From 3.400.000₫
Máy bơm nước 1 pha công suất 2.2kW 3Hp chính hãng
Centrifugal1-Phase2.2kW - 3HP60m3/h
From 4.050.000₫
Máy bơm nước 1 pha 3.7kW 5Hp chính hãng
Centrifugal 1-Phase 3.7kW - 5Hp 11.7m3/h
From 7.000.000₫
Máy bơm nước 1 pha 3kW 4Hp chính hãng
Centrifugal1-Phase3kW - 4Hp84m³/h
From 6.250.000₫
Máy bơm nước 3 pha 11kW 15Hp chính hãng
Centrifugal3-Phase11kW - 15Hp144m3/h
From 12.900.000₫
Máy bơm nước 3 pha 1.5kW 2Hp chính hãng
Centrifugal3-Phase1.5kW - 2Hp20m3/h
From 4.000.000₫
Máy bơm nước 3 pha 15kW 20Hp chính hãng
Centrifugal3-Phase15kW - 20Hp132m3/h
From 14.250.000₫
Máy bơm nước 3 pha 18.5kW 25Hp chính hãng
Centrifugal3-Phase18.5kW - 25Hp180m3/h
From 14.400.000₫
Máy bơm nước 3 pha 2.2kW 3Hp chính hãng
Centrifugal3-Phase2.2kW - 3HP24m3/h
From 4.900.000₫
Máy bơm nước 3 pha 22kW 30Hp chính hãng
Centrifugal3-Phase22kW - 30HP225m3/h
From 21.300.000₫
Máy bơm nước 3 pha 3.7kW 5Hp chính hãng
Centrifugal3-Phase3.7kW - 5HP39m³/h
From 5.900.000₫
Máy bơm nước 3 pha 30kW 40Hp chính hãng
Centrifugal3-Phase30kW - 40Hp225m3/h
From 27.900.000₫
Máy bơm nước 3 pha 37kW 50Hp chính hãng
Centrifugal3-Phase37kW - 50Hp144m3/h
From 29.500.000₫
Máy bơm nước 3 pha 5.5kW 7.5Hp chính hãng
Centrifugal3-Phase5.5kW - 7.5HP120m3/h
From 8.100.000₫
Máy bơm nước 3 pha 7.5kW 10Hp chính hãng
Centrifugal 3-Phase 7.5kW - 10Hp 132m³/h
From 8.400.000₫
Máy bơm nước Teco 0.75kW 1Hp chính hãng
TECO3-Phase0.75kW - 1Hp19.2m3/h
From 5.500.000₫
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