Elmore County Republican. [volume] (Mountain Home, Idaho) 1910-1915, 1911-08-05

IN nelgnt and this water should b
lifted at the rate of at least 450 t
o00 gallons per minute in order Il
keep the storage reservoir full il
case OF long use for a hard fire. /
would be better to operate the al
compressor by proper betting than b,
direct connection through reduction
gearing and pinions. The air shoul,
be furnished at the rate of about 2Ol
cubic feet OF free air per minut.
under a pressure of from rs to 81
pounds per square inch.
The process of lifting water BY
| compressed air is still In its infancy
and while much is claimed by the
manufacturers OF air compressors an,
air lifts, the fact remains that there
is still a great deal to be learned a
bout the economic application ol
compressed air in pumping water es
peclally In connection with public
water supplies. believe Ii can be
developed into very satisfactory
method and one that should be low
In operating cost when cheap power
Is available. 1t Is not yet in use in
any great number of public water
supplies in the United States. The
flow OF water to the point where the
compressed air Is supplied must be
free and should come to that point
with as much upward pressure as
possible throughout the period of ap-
pllcation Of the compressed air.
Taking into account the mechanical
efficiency of the air compressor, the
inevitable losses in the air receiver
where the compressed air is stored
before and during its use, the pow
er loss In the belt transmission and
the efficiency of the motive power,
do not believe that for this case,
less than from go to rs rated horse
power should be provided. The plant
should be installed in two units,
each one capable of furnishing 10
the total required quantity Of com
pressed air at the full pressure. In
ordinary use only one unit would be
operated but both would be operat-
ed together when necessary. This
plan would give the town an auxil-
iary unit In case of break or injury
to one which would be the wisest
plan to adopt for a pumping plant of
this nature. A duplicate pumping un-
It should always be installed when
possible. In this case, probably $50
horse power motors and 2-Sx10 air
aompressors would be satisfactory.
each air compressor to have Its awn
air receiver.
Inasmuch as the storage reservoir
and pumping plant would be together
probably storage capacity of 1000 i
,OO gallons would be amply suffici-
INT. 1t Is not comparable to the
hammond Springs supply with its 81
niles OF high pressure piping between
he source and the storage reservoir.
lhis reservoir would have to be |
covered as in the other case.
The supply main from the reser- |
,oir to the town must be In duplicate
o meet the rather rigid require |
nents OF the Board of Fire Under |
writer's with regard to gravity sup
'lies. The combined capacity of the
Wo lines of pipe must be at least |
40 gallons per minute as In the case
II the Hammond supply and this
must be delivered with as
title friction loss as possible. An 81
nch pipe will deliver from the
swan location 250 gallons per minute
n the town under pressure of a.
out 80 to 65 pounds per square inch.
his constitutes good working fire
ressure for any present sized build
ngs In the town and is about the
ame quantity and pressure as the
inch pipe lines would deliver In the
hammond supply.
II this supply from the Swan loca.
ION We're installed, the following a.