Centrifugal Pumps and Its Types

CENTRIFUGAL PUMPS ARE ROTATING MACHINES, which use impeller force to trigger flow and pressure automatically to lift water and fluids to higher ground. This happens by converting kinetic energy to hydrodynamic energy of fluid flow. The rotational energy is brought about by the electric or engine mortar. FRANCESCO DI GIORGIO MARTINI, an Italian engineer in 1475, developed a mud-lifting machine, which was considered the first type of centrifugal pumps.

Let’s take a look at some of the common centrifugal pumps used today. Since they are used for different jobs, it’s important to know which one to use when.


AXIAL FLOW PUMPS

It uses a propeller in a pipe, which is driven by a motor inside the tube, attached outside the pipe or using a right angle drive shaft, which pierces the pipe. The propeller continuously puts pressure on the fluid or gas forcing their flow parallel to the axis of rotation. Power required increases as the flow decreases. The highest power is achieved at zero flow rate. Therefore, the power required increases with the increase in flow.


Advantages

  1. It has a high flow rate at a relatively low power.
  2. It is easily adjustable to run at peak efficiency by changing the pitch of the propeller.

The most common application of the axial-flow pump is the sewage niche ranging from commercial, industrial and municipal services. They are also used in transfer pumps to sail ballast. They can be used to lift water used for irrigation and pumping water from reservoirs.


MIXED/RADIAL FLOW PUMPS

This is a CENTRIFUGAL PUMP with a mixed impeller. The impellers for high-speed pumps are fitted with a diffuser and a tubular casing while those of relatively low speed are fitted with a volute casing. Fluids or gasses enter through the axial plane, and then it is moved by the impeller and exits at the right angle to the shaft radially. This kind of pump operates in higher pressures than the axial flow pumps and offers higher discharge than the radial flow pumps.


Advantages

  1. They are highly reliable and are not strenuous.
  2. They are best suited for industrial use since they are cost effective and require less power to move large volumes of fluid.
  3. This type of centrifugal pump is durable thus will be of great economic importance for an extended period.

This kind of pump is used in situations that require a high level of flow with low pressure applied. They are highly recommended for industrial use due to the low cost of operation and durability.


PERIPHERAL PUMPS

In this case, the peripheral impeller rotates in a large concentric casing channel with both an inlet and outlet. As the fluid repeatedly circulates between the impeller and the pipe surface, high energy is created. The energy created forces the fluid to move from the center of rotation to the outlet point. This KIND OF PUMP CAN PUMP FLUIDS with high gas content better than any other type of centrifugal pump.


Advantages

  1. They are not sophisticated and thus can be used in small scale pumping of water.
  2. They don’t use much energy as they utilize the momentum of the fluid.

Peripheral pumps are also used in pumping uncontaminated water or other uncontaminated fluids. They are mostly used for car-wash pumps or for pressure boosting purposes.

JET PUMPS

This is a type of pump that is controlled using a power switch. One will switch on the power switch in case water or fluid pumping is needed. It circulates water in loops when pumping and is available in several ranges of horsepower and performance rates. This type of pump is used to pump water from deep or shallow wells.

Advantages

  1. They are easy to operate.
  2. They are cheap.

They can be used to pump water to households or sprinklers used for irrigation.


For more info contact water pump suppliers in uae or call us at +971 4 252 2966


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