2025 Nelsen Corporation Catalog - Catalog - Page 448
17 Conversion Tables & Formulas
Technical & Engineering
Volume
Length
231.0 in
0.137 ft3
3.785 liters
.00379 meters3
0.833 Imp gal
0.238 42-gal barrel
1.2 U.S. gal
7.48 U.S. gal
0.0283 meter3
0.2642 U.S. gal
35.314 ft3
264.2 U.S. gal
43,560 ft3
325,829 U.S. gal
3,630 ft3
27,100 U.S. gal
3
1 U.S. Gallon
1 Imperial Gallon
1 Cubic Foot
1 Liter
1 Cubic Meter
1 Acre Foot
1 Acre Inch
1 Inch
1 Foot of Water
1 Rod
16.5 feet
1 Mile
5280 Feet (1.61 Kilometers)
1 U.S. Gallon of Water
8.33 lb
1 Cubic foot of Water
62.35 lb
1 Kilogram or Litre
2.2 lb
1 Imperial Gallon
10.0 lb
Water H.P.
Equals
227 gpm
2.04 in. mercury
1 Acre Inch Per Hour
454 gpm
0.07 kg/cm2
1 Cubic Meter Per Minute
264.2 gpm
0.433 lb/in
1,000,000 Gal. Per Day
595 gpm
Horsepower required to lift
water at a definite rate to
a given distance assuming
100% efficiency
H.P. delivered by motor
H.P. input x motor
efficiency
10.35 meters of water
3.28 feet of water
1.34 x KW input x motor
efficiency
Brake H.P.
Equals
Water horsepower
Pump efficiency
G.P.M. x total head (ft.)
3960 x pump efficiency
G.P.M. x total head (lbs/in2)
103,000 x pump efficiency
Efficiency
34.0 ft of water
Efficiency
Equals
Power Output
Power Input
Motor
Efficiency
Equals
H.P. Output
K.W. input x 1.34
20,000 grains/cu. ft.
6 lbs. salt
24,000 grains/cu. ft.
9 lbs. salt
Pump
Efficiency
Equals
G.P.M. x total head (ft.)
103,000 x B.H.P.
30,000 grains/cu. ft.
15 lbs. salt
Height of
Tank
x
Resin Exchange Capacity
Note:
7.48
To convert parts per million
(ppm) or milligrams per liter
(mgl) to grains divide by 17.1.
Example: Water Hardness of 250 ppm
To Find Capacity of a Tank or Cistern
x
1.34 x kilowatts
input to motor
G.P.M. x total head (in ft.)
3960
.885 in. mercury
.7854
Horsepower input to motor
H.P. required by pump
14.7 lb/in2
x
H.P. Input
Equals
Capacity
1 Acre Foot Per Day
14.22 lb/in2
33,000 ft lbs per minute
550 ft lbs per second
Weight
2.31 ft. head of water
1 Kilogram Per
Square Cm
Diameter
of Tank in
Square Feet
.746 kilowatts of 746 watts
1 H.P.
Equals
39.37 inches
449 gpm
1.132 ft of water
1 Meter of Water
3.28 feet
1 Cubic Foot Per Second
(2nd foot) (C.F.S.)
1 Inch of Mercury
(or vacuum)
1 Atmosphere
(at sea level)
2.54 centimeters
1 Meter
Head
1 Pound Per
Square Inch
(p.s.i.)
Horsepower
=
Capacity in
U.S. Gallons
(250 ppm ÷ 17.1 ppm/gr) = 14.6 gr.
Conversion Factors
GPG (grains per gallon)
=
.7854
PPM (part per million)
=
MG/L (milligrams/liter)
PSI
=
Rise in Feet X .434
=
50 feet x .434
=
22 PSI loss on 5th Floor
=
D2 x .785
i.e.: 5 story building
Square Foot of Bed Area
17 - 28
For more information visit – NelsenCorp.com • NelsenWaterSolutions.com • VESTAwater.com
All prices and products subject to change without notice. ©Nelsen Corporation
