This is opposite of the trend with radial flow pumps, which require an increasing horsepower at higher flow rates. Axial flow pumps are used in applications that require very high flow rates and very low amounts of pressure head. They are useful as circulating water pumps in power plants. And they are useful in flood dewatering applications where large quantities of water need to be moved a short distance, such as over a levee or dyke. These applications are not nearly as common as applications for radial flow pumps, so there are not nearly as many axial flow pumps as there are radial flow pumps.
These heavy-duty pumps are widely used for irrigation, flood control, drainage projects, industrial process, large scale primary water supplies, power plant condensing and other circulating systems. The axial flow propeller is positioned in an individual housing just above the suction bell and close to the pump inlet.
Water enters the pump through the suction bell, is discharged by the impeller into a guide vane section or diffuser, and then is pumped through the outer column to the discharge connection of the pump elbow.
These pumps generally operate in a submerged state with suction entrances flooded. Horizontal units are installed with a positive suction head. The pumps all have a vertical arrangement and are made for applications that require large volumes of water with low head. The company designed its VAF model axial flow pump for the waste water, flood control, irrigation, dewatering applications and much more. The pump has a flow capacity to , gpm and 60 feet of head.
The VAF can also handle solids up to 14 inches in diameter and pressures to 26 psi. Centrifugal pumps can sometimes be noisy, perform poorly, break shafts, and cause other problems. Axial flow pumps operate like the propeller in boats and can also be called as propeller pumps. Axial flow pumps apply the centrifugal force to the fluids moving across the impeller.
When the centrifugal force becomes greater than the gravitational force holding the fluid, the fluid rises and flows outside the pipe. Here the conversion of energy is done using the angular momentum principles. The axial flow or propeller pump is the converse of the axial flow turbine and is look alike in appearance. When selecting an axial flow pump, we have to consider the following key specifications as follows.
Axial flow pumps are found mainly in sewage treatment plants and agricultural irrigation. They are also used in fisheries flood control operation, chemical industries, power plants, etc. One of the simplest application used in our day to day life is the hand pump through which we get the water supply from the underground. Here our human effort is the power supply which drives the water supply from the underground. They can give a large flow of water from nearby waterway to crops. In East Asia, smaller farmers use this kind of pumps for crop irrigation, drainage, and fisheries.
In sewage treatment plant, they are used for transfer of fluids across the different conveyors and reservoirs. The direction of the flow is easily reversed in these types of pumps. Axial flow pumps circulate large amounts of liquid in evaporators and crystallizers in chemical industries. They are also used in flood disaster management system because they can pump out a large amount of the water during crises time. One such example was they are used in flood control system in New Orleans, Louisiana where the stormwater is stored in a canal and later pumped to the nearby lake.
Thereby saving thousands of lives and helping in water storage also. There are many different types of pumps on the market, this article will help you understand the differences between each pump type.
But it can be difficult to know exactly which pump you should choose. There are so many designs and niches that identifying the pump which will meet these three needs can be confusing. To simplify things when trying to select your pump, there are two types of pump which work in very different ways and broadly encapsulate most pump designs. This type of pump is one of the most common in use today. Like other pump designs, it uses an impeller, which is a rotating blade to generate suction which then moves fluid through pipes.
The rotating impeller creates what is known as centrifugal force, giving this pump design its name. The pump can be driven by an electric motor or engine. Centrifugal pumps are usually used for liquids which are low in viscosity and low in solid concentration.
However, there is a centrifugal slurry pump which can move liquids with a large amount of particles. This type of pump creates an expanding cavity on the suction side of the pump and a contracting cavity on the discharge outlet. This difference creates pressure which pulls and pushes a fluid simultaneously, exerting enough force to create flow. Due to the design, positive displacement pumps are better at handling viscous material.
There are many different types of positive displacement pumps, such as:.
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