This air-operated pump is remarkably simple
and adaptable. It has no diaphragms, seals or bearings. The only parts that move
are the intake and outlet valves, and the air valves.
The pump uses compressed
air passing through a nozzle to create lower pressure in the main chamber (80
PSI needed). The lower pressure draws water into the chamber.
When the chamber
is full an air valve changes position, and the air pressure is then used to push
the fluid out of the main chamber, at 80 PSI. When the fluid is emptied the valve
switches back again and the cycle repeats.
This pump's simplicty and safety
(no electricity, no rotating or sliding parts) are its major strong points.