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Should You Choose a Mono Pump or a Centrifugal Pump?

In industrial plants, infrastructure projects, and process applications, pump selection is a critical decision that directly affects system efficiency, energy consumption, and operating costs. One of the most frequently asked questions is whether to choose a mono pump or a centrifugal pump.

Both pump types have different operating principles and application areas. To make the right choice, the fluid properties, system pressure, and process requirements must be evaluated together.

What is a Mono Pump? How Does it Work?

A mono pump, also known as a progressive cavity pump, belongs to the class of positive displacement pumps. These pumps operate by a helical rotor rotating inside an elastomer stator. Thanks to this structure, the fluid moves in fixed-volume chambers.

The most distinctive feature of mono pumps is their ability to generate high pressure at low speeds and transfer fluid without altering its structure. Therefore, they provide a significant advantage in transporting sensitive and viscous fluids.

The prominent advantages of mono pumps:

Ability to easily pump high-viscosity fluids
Flow rate does not change depending on pressure
Stable performance in liquids containing solid particles
Low vibration and quiet operation

Thanks to these features, mono pumps are frequently preferred in mud, chemical dosing, wastewater, food and industrial processes.

What is a Centrifugal Pump? How Does it Work?

Centrifugal pumps belong to the dynamic pump group and their working principle is based on the principle of giving kinetic energy to the liquid thanks to the rotating impeller. The liquid is conveyed from suction to discharge by centrifugal force.

This type of pump offers ideal solutions especially for low-viscosity and clean liquids. The ease of installation and the relatively low initial investment cost are among the factors that make centrifugal pumps widespread.

Key advantages of centrifugal pumps:

Simple and compact design
Efficient operation at high flow rates
Low maintenance requirements
Wide range of applications

Centrifugal pumps are commonly used in water supply, cooling systems, HVAC applications, and industrial circulation lines.

Key Differences Between Mono Pumps and Centrifugal Pumps

Clarifying the differences between the two pump types makes it easier to make the right choice.

Fluid type:

Mono pumps are suitable for viscous, solid-particle, and sensitive fluids.
Centrifugal pumps, on the other hand, are more efficient in low-viscosity and clean fluids.

Pressure-flow rate relationship:

In mono pumps, the flow rate is constant and unaffected by pressure.
In centrifugal pumps, the flow rate varies depending on the system pressure.

Energy efficiency:

Mono pumps operate more efficiently in high-viscosity fluids.
Centrifugal pumps offer an advantage in low-viscosity fluids.

Maintenance and operation:

Mono pumps require periodic maintenance due to stator wear.
Since centrifugal pumps contain fewer moving parts, maintenance processes are simpler.

Which Pump Should Be Preferred for Which Application?

When selecting a pump, the concept of "more suitable for the application" should be prioritized over "better".

Mono pump for mud, dense chemicals, viscous liquids, and sensitive processes
Centrifugal pump for water, low-density liquids, and circulation applications
Mono pump for systems requiring constant flow rate
Centrifugal pump for high-flow, low-pressure systems

Incorrect pump selection can lead to energy losses, equipment failures, and process inefficiency. Therefore, accurate analysis of system needs is crucial.

Correct Pump Selection Determines Efficiency

There is no single correct answer to the question of whether to choose a mono pump or a centrifugal pump. The selection should be made according to the fluid properties, operating pressure, flow rate requirement, and process conditions.

Correct pump selection not only improves system performance but also significantly reduces operating costs in the long run.