Fire fighters need water - and lots of it.
For thousands of years the Ctesibian pump was commonly used to pump water onto
a fire. |
Now a PUMPER TRUCK is brought in, carrying a variety of pumps within it. Typical service requirements for each pump may be 1000 gallons per minute at a minimum pressure of 120 P.S.I. (pounds per square inch).
Such a pump might supply seven or eight fire hoses at once, each a thousand feet long.
A turret pipe nozzle such as that shown here can deliver water at upwards of 200 P.S.I.. This is possible because it doesn't have to be held, just aimed, and the water doesn't need to run through hoses.
Many types of pumps are used for fire pumper trucks including piston pumps, rotary pumps, and single- and multi-stage impeller pumps (serial and parallel centrifugal pumps).
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