A submersible pump has a hermetically sealed motor close-coupled to the pump body. The entire assembly is submerged in the fluid to be pumped. Submersible pumps traditionally do not require priming due to being constantly submerged in fluid. Moreover, insufficient fluid could seriously damage the device.
How Does a Submersible Pump Work?
A submersible pump converts rotary energy into kinetic energy by using pressure energy pulled in from the pump. As the fluid proceeds through the pump, it goes through the intake valve and is then pushed through the impeller and into the diffuser. The fluid will then flow to the surface.
Hence, submersible pumps are considered multistage centrifugal pumps. The hydraulic motor inside of the pump is often a closed cycle pump, though it may also be an open cycle in some instances. The differences between the two aren’t that important to consider because both operate similarly.
Submersible pumps, hence their name, must be submerged in fluid at all times to perform properly and may overheat if not submerged.
A typical submersible pump also has a multitude of different operational applications, including sewage, pond maintenance, and hydrocarbon extraction.
Submersible Pump Highlights
Operation – easier operation and lower operational costs
High Efficiency – high efficiency with low energy consumption
Configurations – expansive customization
Sound – quiet
Seal corrosion – if the pump seal corrodes, fluid will seep into the motor and cause severe damage
Overheating – low fluid levels can trigger overheating
Maintenance –The pump seals should be replaced annually and appropriate water levels should be maintained to properly operate submersible pumps.