*TM 5-813-1/AFM-88-10, Vol. 1
(2)
Choice. Domestic systems commonly
motors. A number of pump bowls may be mounted in
employ jet pumps or small submersible turbine pumps
series, one above the other to provide the necessary
for lifts under 25 feet. For deeper wells with high
discharge pressure. Characteristics for various types of
capacity requirements, submersible or lineshaft turbine
pumps used in wells are listed in table 5-5.
pumps are usually used and are driven by electric
Table 5-5. Characteristics of pumps used in water supply systems.
Source: Manual of Individual Water Supply Systems, UDHEW.
Practical
Usual well-
Usual
Type of Pump
suction
pumping
pressure
Advantages
Disadvantages
Remarks
lift
depths
heads
Reciprocating:
1. Shallow well...
22-26 ft.
22-26 ft
100-200 ft
1. Positive ac-
1. Pulsating dis-
1. Best suited for
2. Deep well...
22-25 ft.
Up to 600
Up to 600
tion.
charge.
capacities of 5-25
feet
feet above
2. Discharge
2. Subject to vi-
gpm against moder-
cylinder.
against variable
bration and
ate to high heads.
heads.
noise.
2. Adaptable to
3. Pumps water
3. Maintenance
hand operation.
containing sand
cost may be high.
3. Can be installed
and silt.
4. May cause de-
in very small diame-
4. Especially
structive pres-
ter wells (2" cas-
adapted to low
sure if operated
ing).
capacity and high
against closed
4. Pump must be
lifts.
valve.
set directly over
well (deep well
only).
Centrifugal:
1. Shallow well
20 ft. maxi-
10-20 ft.
100-150 ft.
1. Smooth, even,
1. Loses prime
1. Very efficient
a. straight centrifu-
mum
flow.
easily.
pump for capacities
gal (single stage)
2. Pumps water
2. Efficiency de-
above 50 gpm &
containing sand
pends on operat-
heads up to about
and silt.
ing under design
150 feet.
3. Pressure on
heads & speed
system is even &
free from shock.
4. Low-starting
5. Usually relia-
ble and good ser-
vice life.
b. Regenerative
28 ft. maxi-
28 ft.
100-200 ft.
1. Same as
1. Same as
1. Reduction in
vane turbine type
mum
straight centrifu-
straight centrifu-
pressure w/in-
(single impeller)
gal except not
gal except main-
creased capacity not
suitable for
tains priming
as severe as
pumping water
easily
straight centrifugal.
containing sand
or silt.
2. They are self-
priming.
2. Deep well
Impellers
50-300 ft.
100-800 ft.
1. Same as shal-
1. Efficiency de-
a. Vertical line
submerged
low well turbine.
pends on operat-
shaft turbine
ing under design
(multi-stage)
head & speed.
2. Requires
straight well
large enough for
turbine bowls
and housing.
3. Lubrication &
alignment of
shaft critical.
4. Abrasion from
sand.
5-17
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