Centrifugal Pumps
Monoblock, End-Suction and Closed-Impeller Industrial Water Pumps
Centrifugal Pumps are high-performance pumping systems used to transfer, pressurise and circulate clean water and low-viscosity liquids within installations. In the monoblock design, the pump and motor are combined on the same housing, creating a compact, durable and easy-to-install structure.
The end-suction hydraulic design enables the fluid to reach the impeller in a regular manner, providing stable flow and pressure. It can be used in booster systems, mechanical installations, industrial processes, agricultural irrigation, cooling water and domestic-water applications.
Monoblock Design
Combining the pump and motor in the same housing simplifies installation and eliminates the need for coupling alignment.
2.2 kW / 3 HP
The example product option can be used in industrial applications with a 380 V three-phase electric motor.
Cast Housing
The durable cast housing improves mechanical strength and helps limit vibration.
Mechanical Seal
The stainless-steel shaft and mechanical seal system support long-term leak-tightness.
What Is a Centrifugal Pump?
A centrifugal pump is a type of pump that transfers mechanical energy from an electric motor to the fluid through a rotating impeller. As the impeller rotates, the liquid moves from the centre outward, and velocity energy is converted into pressure energy in the volute casing.
In end-suction models, the liquid enters the impeller centre parallel to the pump shaft and is transferred from the impeller periphery to the discharge line. This structure is widely used for clean water, cooling water, domestic water and similar low-viscosity liquids.
How Do Centrifugal Pumps Work?
Fluid Suction
The liquid reaches the impeller centre through the suction line and pump suction flange.
Impeller Rotation
The motor rotates the closed impeller, imparting velocity and centrifugal force to the fluid.
Pressure Generation
The fluid’s velocity energy is converted into pressure energy in a controlled manner inside the volute casing.
Transfer to the Discharge Line
The pressurised liquid is conveyed to the installation or process line through the discharge flange.
Sample Monoblock Centrifugal Pump Technical Specifications
| Technical Feature | Value | Description |
|---|---|---|
| Pump size | 32-160 | Pump designation indicating the discharge diameter and nominal impeller size. |
| Pump type | Monoblock end-suction centrifugal | The pump and motor are combined in the same construction. |
| Motor power | 2.2 kW / 3 HP | Motor power alone does not determine pump flow rate and head. |
| Supply voltage | 380 V | Used with a three-phase electrical supply. |
| Rotational speed | Approximately 2900 rpm | Operating speed dependent on mains frequency and motor pole count. |
| Housing material | Cast iron | Can be used in clean-water and suitable industrial-water applications. |
| Shaft material | Stainless steel | Provides corrosion resistance and mechanical strength. |
| Seal type | Mechanical seal | Limits fluid leakage around the pump shaft. |
| Suction diameter | DN50 | The suction pipe should be selected according to suitable velocity and NPSH conditions. |
| Discharge diameter | DN32 | The discharge line diameter should not be determined solely by the pump flange. |
| Impeller type | Closed impeller | Suitable for clean and low-viscosity liquids. |
| Connection type | Flanged | Provides a secure connection to industrial piping systems. |
| Motor protection class | IP55 | Provides a specified level of protection against dust and water jets. |
| Insulation class | F | Indicates the temperature-resistance class of electric motor windings. |
| Fluid temperature | 0°C to +90°C | The final limit depends on seal, gasket and fluid characteristics. |
Actual pump flow rate, head, efficiency and motor-load values should be verified at the selected operating point using the manufacturer’s performance curve.
Design and Construction Features
As the pump and motor are installed in one structure, coupling alignment and separate bearing requirements are reduced.
The fluid enters the impeller centre in a direction parallel to the pump shaft.
Enables efficient transfer of clean, particle-free liquids.
Creates a rigid construction for mechanical strength and stable operation.
Supports corrosion resistance at the shaft surface and mechanical service life.
The seal material should be selected according to the temperature and chemical composition of the fluid.
Centrifugal Pump Applications
Advantages of Centrifugal Pumps
Installation and Operating Recommendations
Compatible Equipment
Frequently Asked Questions About Centrifugal Pumps
They can be used with clean, low-viscosity liquids that do not contain solid matter large enough to damage the pump.
If the pump curve meets the required flow rate and pressure, they can be used in booster systems together with a suitable control panel and balance tank.
They can be used in continuous-operation applications at the correct operating point and under adequate cooling and suitable maintenance conditions.
They can be operated with frequency control by considering the permitted minimum and maximum speed limits of the motor and pump.
The liquid inside the pump helps cool and lubricate the mechanical seal. Dry running can cause rapid damage to the seal and pump components.
Pump Selection Note
When selecting a centrifugal pump, design flow rate, total dynamic head, static elevation difference, pipe and equipment pressure losses, fluid temperature, density, viscosity, suction conditions and available NPSH value should be evaluated together.
A 2.2 kW motor power rating alone does not indicate the flow rate and pressure that the pump will provide. The final operating point should be verified together with the system curve on the pump performance curve. Different impeller and pump constructions should be selected for liquids containing solid particles, fibres or abrasive materials.
Get Technical Support for Centrifugal Pump Selection
Pump selection should be based on system flow rate, pump head, fluid temperature, suction conditions and daily operating time.
You can receive technical support in determining the suitable centrifugal pump and motor power for clean water, booster, mechanical installation, irrigation, HVAC and industrial process applications.
