The Flometrics pistonless rocket fuel pump increases safety, reliability and performance while reducing cost and development time. The pistonless pump uses only a few valves and pump chambers to achieve better performance than current rocket fuel pump design.  Compared to the turbopump, the pistonless pump lasts 100 times longer and costs less to develop and fly. Unlike the other pump technology where the whole fuel tank is pressurized to 2-7MPa, only the pistonless pump main tank is pressurized to 100-400kPa, and then the pump chamber is pressurized to deliver fuel to the engine.  An auxiliary chamber supplies fuel while the main pump chamber is being refilled.  This type of pump has benign failure modes, and can be installed in to the fuel tank to minimize vehicle size. It uses an inexpensive material sand process in its construction.

Pistonless rocket fuel pump advantages:

Improved Performance:

The system uses less than 1% of the fuel mass of the fuel used as pressurant which offers a performance compared to the 2-3% used by turbopump rockets.

Failure Tolerant

The system has few failure modes, which fail benignly.  For instance a  small leak  in one of the check valves will only increase the pressurant consumption of the pump; it will not cause a pump failure.

Easy To Implement

The rocket fuel pump is easier to integrate than turbopumps because it can be easily scaled up or down and still provide constant, controllable pressure, regardless of flow.

Increased Safety

The rocket fuel pump is easy to start up and shut down with no spool up time required.  Also there is a negligible chance of catastrophic failure because typical failures modes are benign.

High Reliabilty

The pistonless pump is not susceptible to contamination, contains no sliding parts or lubrication, and may be started after extended periods of quiescence. Also the simplicity of the pistonless pump pneumatic operating system reduces the risk of fluid cavitation during operation.


The pump uses inexpensive materials and processes in construction which can be easily scaled up or down, keeping engineering and test costs low