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A Pistonless pump is a type of pump designed to move fluids without any moving parts other than three chamber valves.
The pump contains a chamber which has a valved inlet from the fluid to be pumped, a valved outlet - both of these at the bottom of the pump, and a pressurant inlet at the top of the pump. A pressurant is used, such as steam or pressurized helium, to drive the fluid through the pump.
Additional recommended knowledge
The cycle is as follows:
Application in rocketry
It is most commonly used to supply propellants to rocket engines. In this configuration there are often two pumps working on opposite cycles to ensure a constant flow of propellants to the engine.
The pump has the advantage over a presure-fed system in that the tanks can be much lighter. Compared to a turbopump the pistonless pump is a much simpler design and has less stringent design tolerances.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Pistonless_pump". A list of authors is available in Wikipedia.|