Global Pump (from Internet Glossary of Pumps)
Global Pump
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.

(This is a still representation and possibly also a low-resolution image of a pump which is fully animated in the CD-ROM version of this glossary.)

Go to web page describing Statistics Explained

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Last modified February, 2002
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