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Difference Between Centrifugal Pump and Reciprocating Pump

Difference Between Centrifugal Pump and Reciprocating Pump

Last Updated on October 14, 2024

When it comes to industrial growth, pumps play an important role. Centrifugal and Reciprocating pumps are some of the most commonly sought for pumps. In this blog, after covering the definitions and applications, we will try to understand the basic difference between centrifugal pump and reciprocating pump.

What are Centrifugal Pumps?

Pumps that work on the principle of centrifugal force are known as centrifugal pumps. When the impeller present in the pump rotates, a centrifugal force is generated. The rotation also creates low-pressure area that allows the liquid to be drawn in the pump. Now,  the fluid gains velocity and is discharged from the pump outlet. 

These pumps are also known as multi-stage pumps and can handle high flow rates with ease. Let us look at some of the applications of centrifugal pumps:

  • Municipal Water System: Centrifugal pumps find wide usage in municipal water supply systems where they transfer water to residentgial spaces from treatment plants.
  • Agriculture: Centrifugal pumps play a vital role in agricultural department where they are used to distribute water in the fields.
  • Industrial Process: Industries such as chemical manufacturing, pharmaceuticals and food processing units use centrifugal pumps to circulate chemicals and solvents. 

What are Reciprocating Pumps?

Pumps that use to and fro movement of the fluid are known as reciprocating pumps. The piston, diaphragm and plunger are the main components of reciprocating pumps. They displace the liquid from the pump in a controlled manner. They are great at places where the liquid has to be pushed with a significant force. 

These pumps are of two types: single-acting pumps and double-acting pumps. Some of their applications include:

  • Hydraulic Systems: Hydraulic systems use reciprocating pumps where they eject high-pressure fluid ready to operate a machiinery. 
  • Oil Well Drilling Systems: Reciprocating pumps are highly popular in drilling oil wells. 

Centrifugal Pumps Vs Reciprocating Pumps: Comparing Various Aspects

In the following paragraphs, let us try to understand the differences between centrifugal pumps and reciprocating pumps.  

1. Operating Principle:

  • Centrifugal pumps are based on the principle of centrifugal force. The use of an impeller lets the fluid flow in the desired direction. As mentioned above, centrifugal pumps work on the principle of centrifugal force.
  • Reciprocating pumps use the to-and-fro motion of the piston or diaphragm to displace the fluid. 

2. Capacity and Head (Pressure):

  • Centrifugal Pumps can provide different capacities. This is achieved by adjusting impeller size or rotational speed, resulting in increased head and flow rate. Centrifugal pumps are unsuitable for high-pressure jobs although they boast a high capacity-to-footprint ratio.  
  • In reciprocating pumps, the capacity can be increased by altering the size of the plunger and is well-suited for high-pressure jobs. 

3. Effect of Viscosity:

  • When pressure increases, fluid viscosity has less of an impact on flow rate, thus, centrifugal pumps exhibit a relatively constant flow rate throughout a larger pressure range.
  • High-viscosity fluids adversely affect reciprocating pump performance, resulting in decreased flow rate and higher power demands.

4. Performance:

  • There is a clear change in the performance of the centrifugal pump with the change in operating points. The fluid flow rate is directly affected with the change in operating points. 
  • In reciprocating pumps, a constant flow rate is maintained, whatever the operating point may be. Pressure levels in the pump might be different but the performance in regards to the flow rate remains the same. 

5. Area Required for Installation:

  • Centrifugal pumps have a compact size which enables them to be fitted in a small space. 
  • Reciprocating pumps are larger in size and include more and larger components. 

6. Cost of installation and operation:

  • As centrifugal pumps have a simple design with least moving parts, their initial cost of installation is low. 
  • Reciprocating pumps have a complex structure and more moving parts making their installation costlier than the centrifugal pumps.  

Difference Between Centrifugal Pump and Reciprocating Pump in Tabular Form

PropertiesCentrifugal PumpsReciprocating Pumps
Operating principleCentrifugal forceReciprocating piston motion
Flow of liquidHighLow
Pressure capabilityLower pressure capabilityHigher pressure capability
Efficiency of pumpsEfficiency for high-flow rates is highEfficiency is low due to reciprocation
MaintenanceMinimal maintenance, durableRequires more maintenance
MechanismLess complex mechanism with fewer moving partsComplex mechanism with pistons, valves, and other moving parts
Handling of fluidsCan handle several types of fluidsCan also handle different types of fluid preferably with low viscosity
CostLess installation and operational costsHigh initial cost
Dirty waterCan lift dirty waterCannot lift dirty water
Discharge patternContinuous and smoothFluctuating and pulsating
Handling abilityHandles massive volumes of liquidHandles small volumes of liquid
Application typeUsed for large discharge through small headsMeant for small discharges at high heads
Installation AreaNeeds smaller areaNeeds a larger floor area

Conclusion:

  • When used for low-pressure jobs, centrifugal pumps are highly energy-efficient and the opposite goes for reciprocating pumps that work extremely well with high-pressure jobs. 
  • Since reciprocating pumps have more moving parts, they require more maintenance than the centrifugal pumps. 
  • Centrifugal pumps are more appropriate for low-viscosity fluids while reciprocating pumps can handle a wider range of fluid types, including those with higher viscosity or abrasive properties.

FAQ’s

Q. Which is more efficient, the centrifugal pump and reciprocating pump?

Since reciprocating pumps can function well in all operating situations, they are better than the centrifugal pumps. 

Q. Where is the reciprocating pump used?

A reciprocating pump is used in all situations where the pressure rate is high. The fluid is moved with the movement of the piston. 

Q. Where is the Centrifugal pump used?

A centrifugal pump is used in domestic, agricultural and residential applications. 

Q. Which is heavier – centrifugal pump or reciprocating pump?

Since the reciprocating pumps have more moving parts, they are heavier than centrifugal pumps.

Q. What are the maintenance requirements for each type?

Maintenance requirements for Centrifugal Pumps:
– Ensure proper lubrication
– Monitor Noise Levels
– Check head pressure regularly
– Check pump & motor regularly

Maintenance of Reciprocating Pumps:
– Check regularly for any leaks
– Clean the dirt and debris
– Ensure proper lubrication

About Post Author

Diksha Ojha

Diksha is a graduate in English Literature from Delhi University, with a solid background in both technical and creative writing. She has accumulated 4+ years of experience in the field and is currently working as a content writer at Industrybuying. While Diksha is versatile in various writing forms, her true passion lies in creative content creation, where she continually seeks to innovate and engage through her work.