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A submersible pump (or sub pump, electric submersible pump (ESP)) is a device which has a hermetically sealed motor close-coupled to the pump body. The whole assembly is submerged in the fluid to be pumped. The main advantage of this type of pump is that it prevents pump cavitation, a problem associated with a high elevation difference between pump and the fluid surface. Submersible pumps push fluid to the surface as opposed to jet pumps having to pull fluids. Submersibles are more efficient than jet pumps.
A sump pump is a pump used to remove water that has accumulated in a water collecting sump basin, commonly found in the basement of homes. The water may enter via the perimeter drains of a basement waterproofing system, funnelling into the basin or because of rain or natural ground water, if the basement is below the water table level.
(Chemical pumping) The removal of gas from a vacuum system by acting it with another to form a compound of very low vapor pressure.
A new, in-depth white paper featuring several blower technologies was developed and released by Aerzen USA entitled "Aeration Blowers in the Wastewater Industry in North America”. The paper presents four types of blowers: two dynamic and two positive displacement machines. By presenting how each technology has its place, a comparison is made specifically based on the treatment of wastewater.
A booster pump is a machine which will increase the pressure of a fluid, generally a liquid. It is similar to a gas compressor, but generally a simpler mechanism which often has only a single stage of compression, and is used to increase pressure of an already pressurised gas. Two-stage boosters are also made.