Tag:pump_mechanism=piston
 pump_mechanism = piston
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| Description |
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| A positive displacement pump in which a reciprocating piston alternately plunges in the fluid and pushes it out |
| Group: man made |
| Used on these elements |
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| Useful combination |
Status: approved
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| Tools for this tag |
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A piston pump involves a reciprocating plunger that sucks the fluid into the pump chamber to push it out. It also covers plunger pumps and beam engines which are usually seen over petroleum wells.
Two valves alternately open and close along the plunger movement to let the fluid enter the chamber and then going out.
Such pumps are different from a diaphragm pump as the diaphragm doesn't plunge into the fluid and doesn't move like a piston. See pump_mechanism=diaphragm for those.
Biger pumps should be driven by mechanical_driver=electric_motor but you may find them on drinkable water fountains as well, like illustration below.
Examples
| Photo | Location | Tagging | Comments |
|---|---|---|---|
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Germany |
man_made=pump
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A piston pump used to get water by manually raising and lowering the lever. The piston is located underground and move water towards the faucet and then outside of the well |
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USA | A wind pump in a farm in USA involving a piston pump (apparently, on the ground) driven by a windmill and possibly actuated by hand with the help of a lever as well in case of lacking wind. | |
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Mali |
man_made=water_well
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A manual piston pump installed on a water well head in Mali. Water well, piston pump and manual driver (with handle) are 3 independent objects described on the same OSM node here |