Find products best meets your needs. No more worries about the authenticity of suppliers.Find Suppliers
Posted on Nov 23, 2020
An electric submersible pump, also known as a submersible pump, or sub pump, is one type of multistage pumps and, like any other type of multistage pump, is used for delivering fluids from one place to another by providing pressure to the fluids.
While unlike other types of multistage pumps, an electric submersible pump is submerged into the fluids instead of being set as an individual device. To achieve this, the materials that make up an electric submersible pump are robust iron castings with coated epoxy on the outside.
In order to prevent the electric submersible pump against corrosion or wear and tear from the fluids. In addition, since the electric submersible pump is operated by electricity, it is equipped with special electricity cables in order to conform to the moist environments where it is.
Generally, any fluid is stagnant, while if it is required to be used, then it should be running. To make the fluids run, there must be an external force to push the fluids, which is the reason why the multistage pumps exist. Since the multistage pumps are operated by the electricity, there is limitation of the places that they are set.
The multistage pumps are usually set beside or near the device that it is supposed to work for, while the electric submersible pumps can be totally placed right in the fluids, which not only perform their functions, but can also be rest in the fluids without priming beforehand, since it is the hydraulic pressure that promotes them to operate.
Looking from the exterior, an electric submersible pump is made as a cylinder, and doesn’t take up too much space. Inside the electric submersible pump, from the top to the bottom, there is a head that is connected with the pump shaft, which is use to keep and deliver the fluids, an upper bearing, several impellers and diffusers that make multiple stages, and a lower bearing at the bottom.
Around the whole setup inside the electric submersible pump, there is a casing that can effectively protect the components and make a hermetically sealed motor, which is close-coupled to the pump body.
For typical multistage pumps, the source of the fluids comes from the suction inlet, which draws the source of fluids by the device’s own force. However, since the electric submersible pump is set in the fluid, the source of fluid that is going to be delivered by the electric submersible pump is pushed by the hydraulic pressure of the fluid.
In other words, the electric submersible pump is operated by pushing instead of sucking, which is according to the hydrodynamic principle.
When the fluid is pushed into the electric submersible pump from the bottom, the impellers and diffusers would keep rotating by the mechanical power and transfer the fluid through the pump shaft and the upper bearing until the head. Then the pressurized fluid is pushed out of the electric submersible pump to be used for other application.
As far as we know, the electric submersible pump owns a lot of practical features that makes them be used in several applications. With the feature that they are submerged into the fluids, it not only reduces the costs that other multistage pumps may have, but also prevent cavitation, which is caused by the rapidly changing of the pressure, from happening, since the hydraulic pressure around them may maintain proper pressure that is given to the electric submersible pumps.
However, because that the electric submersible pumps can be set in the deep well or sea, it may be hard for taking them out for inspection and maintenance until they break down. In addition, placing a mechanical device into the fluids may turn out lead to corrosion, which is something that cannot be avoided.
In order to deal with this problem, the electric submersible pumps are usually made of corrosion-resistance material, but are also relatively expensive than the normal materials that make the multistage pumps. Therefore, using an electric submersible pump may be effective for many applications, while there are still some problems that you should take in to consideration when selecting the multistage pumps to use.
MTS gathered worldwide Submersible Pump manufacturers into this online platform. Browse and search for your next supplier with us.
Should you run into any difficulties, please do not hesitate to contact us.