================+========+========+========+=========
Diameter | | | |
of Plungers | 2 | 2-3/4 | 3 | 3-3/4
----------------+--------+--------+--------+---------
Length | | | |
of Stroke | 4 | 4 | 4 | 4
----------------+--------+--------+--------+---------
Revolutions | | | |
per Minute | 45 | 45 | 45 | 45
----------------+--------+--------+--------+---------
Gallons | | | |
per Minute | 9.8 | 18.5 | 21.8 | 34.4
----------------+--------+--------+--------+---------
Maximum Water | | | |
Pressure in Lbs.| 150 | 75 | 60 | 40
----------------+--------+--------+--------+---------
Gallons per Hour| 500 | 1,000 | 1,200 | 1,800
----------------+--------+--------+--------+---------
Feet 1 H.P. Will| | | |
Pump Against | 175 | 80 | 70 | 50
----------------+--------+--------+--------+---------
Feet 2 H.P. Will| | | |
Pump Against | 300 | 175 | 140 | 100
----------------+--------+--------+--------+---------
The above useful table is inserted to show the capacities, revolutions,
size of plungers, etc., in these electrically driven pumps, the
automatic feature of which is truly admirable.
It must be remembered that the number of combinations between small
electric motors and proportionate pumps for water, gas, air, etc.,
afford an endless field for the exercise of engineering skill.