Hand Pump
Hand pumps are manually operated pumps; they use human power and mechanical advantage to move fluids or air from one place to another. They are widely used in every country in the world for a variety of industrial, marine, irrigation and leisure activities. There are many different types of hand pump available, mainly operating on a piston, diaphragm or rotary vane principle with a check valve on the entry and exit ports to the chamber operating in opposing directions. Most hand pumps have plungers or reciprocating pistons, and are positive displacement.
Read more about Hand Pump: Hand Pumps and Access To Clean Water, Gallery
Famous quotes containing the words hand and/or pump:
“We have a man who does not boast, but whose hand sees what must be done.”
—Aeschylus (525–456 B.C.)
“Vivacity, leadership, must be had, and we are not allowed to be nice in choosing. We must fetch the pump with dirty water, if clean cannot be had.”
—Ralph Waldo Emerson (1803–1882)