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Advantages of Utilizing an AODD Pump Over a Centrifugal Pump

 It can be very helpful in many ways to use an Air Operated Double Diaphragm Pump (AODD). In this article, we will discuss these advantages, especially emphasizing the excellent effectiveness of the AODD pumps in particular applications while recognising the shortcomings of centrifugal pumps. An air-powered diaphragm pump is known to manage the kinds of applications that a centrifugal pump does not support because of its design, like liquids holding abrasives, viscous liquids and solid-laden fluids.

AODD pumps would also be capable of managing applications that are deadly to most centrifugal pumps including self-priming, sea-less and dry-running. Moreover, AODDs are able to support deadheading the discharge or starving the suction causing no harm to the pump. The mobility as well as the portability of AODD pumps also give it an advantage over centrifugal pumps.

AODD pumps

AODD pumps are having various applications and the most popular are: 

  • Ceramic transfer

  • Washdown under-grade

  • Asphalt slurry

  • Clay slurry

  • Wastewater removal

  • Sump or pit transfer

Common Sources of Damage to Centrifugal Pumps

Liquids Containing Abrasives

In a centrifugal pump, any abrasive liquid would be able to destroy the mechanical sleeves, shaft and seals. These types of damages need costly pump repairs. This is so important to utilise costly as well as specific seal flush plans for also the smallest abrasives in centrifugal pumps.  

But on the other side, AODDs will be capable of easily handling these abrasive liquids as they are built with wide openings, flow paths as well as are outfitted with a diaphragm and check valve materials particularly built for controlling such fluids. 

Solid Laden Liquids

Solids in any centrifugal pump can be disastrous. Harm to the impeller as well as other internal rotating components would be certain together with the probability of burning up the motor.

This kind of damage can be avoided with an air-powered diaphragm pump as its design is able to pass solids. 3/8"-size solids will be able to pass within the pump because of its ball valve technology. Furthermore, 3"-line size solids move within the pump due to its flap valve technology. Shear-sensitive products such as live fish and eggs use a flap valve pump to transport without damage to the products.

Viscous Liquids

Centrifugal pumps are usually confined to viscosities of 2900 SSU, but when it comes to the AODDs, then they are able to handle well over 100, 000 SSU, thus making them a suitable choice to move these viscous materials. AODDs are very useful for sludges, wastewater as well as slurries with varying viscosities. More viscous consistent liquids like glues and pastes can be passed efficiently within these pumps too.

Complex Jobs for a Centrifugal Pump Are no Issue for the AODD

It is certain that no centrifugal pump will be able to operate dry for a very long time. As observed many times, a centrifugal pump in less than a minute of dry-run condition will normally seize up, thus totally destroying the mechanical seal. Furthermore, this can also make the motor overload or burning up.

 But on the other hand, an air-powered diaphragm pump will be able to operate effectively dry without seizing, which means that you would not lose a pump as well as a motor. 

It is essential to know that running a centrifugal pump dry tend to create an enormous heat production within the pump, so as a result of it leading to impeller damage and inevitable failure. 

When we compare the AODDs with the centrifugal pumps, then these are seal-less, self-priming as well as thought to be without any leaks. These are very efficient at clearing sumps or raising fluids from underground as these do not need any specific objects or characteristics to accomplish this. A centrifugal pump will need a specific priming chamber and will be able to only run in a self-priming application if it had no additional usage.

If you close a discharge valve on a centrifugal pump, then it would have malfunction to both the pump, motor as well as probably would have a harmful blow to various upstream system parts. 

But when we consider AODDs, then they will be able to endure a closed discharge or deadheading having definitely caused no harm to any internal object or its source of power: the air compressor. Moreover, a deadheaded AODD utilises no energy, which means that the pump would not undergo wear and also the organizations would not require to waste money on compressed air. 


WRS is a leading AODD pump supplier as our products are designed and built by specialised professionals who are having extensive knowledge about the growing needs and рrеfеrеnсеѕ оf valued сlіеntѕ. Our quality рumрѕ as well as accessories аrе distributed in 50 countries all over the world.


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