2023 Online Catalog - Flipbook - Page 490
17 Conversion Tables, Formulas
Volume
1 U.S. Gallon...
Length
Length
231.0 in3
0.137 ft3
3.785 liters
.00379 meters3
0.833 Imp gal
0.238 42-gal barrel
Horsepower
Horsepower
1 Inch ............................ 2.54 centimeters
3.28 feet
39.37 inches
1 Meter...........................
1 Rod .........................................16.5 feet
1 Mile........... 5280 Feet (1.61 Kilometers)
1 Imperial Gallon..................... 1.2 U.S. gal
1 Cubic Foot.............
7.48 U.S. gal
0.0283 meter3
1 Liter........................... 0.2642 U.S. gal
Weight
Weight
1 U.S. Gallon of Water .................. 8.33 lb
1 Cubic foot of Water .................. 62.35 lb
1 Cubic Meter...........
35.314 ft3
264.2 U.S. gal
1 Acre Foot...............
43,560 ft3
325,829 U.S. gal
1 Acre Inch...............
3,630 ft3
27,100 U.S. gal
1 Kilogram or Litre ........................... 2.2 lb
1 Imperial Gallon ........................... 10.0 lb
Capacity
1 Cubic Foot Per Second
(2nd foot) (C.F.S.) ...................................... 449 gpm
1 Acre Foot Per Day ................................ 227 gpm
1 Acre Inch Per Hour .............................. 454 gpm
1 Cubic Meter Per Minute ............ 264.2 gpm
1,000,000 Gal. Per Day......................... 595 gpm
Head
Electric
Electric Power
Power
1 Pound Per Square Inch (p.s.i.)..........
2.31 ft. head of water
2.04 in. mercury
0.07 kg/cm2
1 Foot of Water....................................
0.433 lb/in2
.885 in. mercury
1 Inch of Mercury (or vacuum) ....................... 1.132 ft of water
1 Kilogram Per Square Cm .......................................14.22 lb/in2
1 Atmosphere (at sea level)................
Technical & Engineering
6
14.7 lb/in2
34.0 ft of water
10.35 meters of water
1 Meter of Water ............................................3.28 feet of water
To Find Capacity of a Tank or
or Cistern
Cistern
Diameter
of Tank
In Feet
Squared
x .7854 x
Height
of Tank
In Feet
1 H.P. Equals…
.746 kilowatts of 746 watts
33,000 ft lbs per minute
550 ft lbs per second
H.P. Input Equals…
Horsepower input to motor
1.34 x kilowatts input to motor
Water H.P. Equals…
Horsepower required to lift water at
a definite rate to a given distance
assuming 100% efficiency
G.P.M. x total head (in ft.)
3960
Brake H.P. Equals…
H.P. delivered by motor
H.P. required by pump
H.P. input x motor efficiency
1.34 x KW input x motor efficiency
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
Capacity
x 7.48 = U.S. Gallons
Efficiency
AC
DC
E
I
W
KW
Apparent Power
Apparent Power
Useful Power W
Power Factor
Power Factor
=
=
=
=
=
=
=
=
=
=
=
=
KW Hr. =
Single Phase =
Power W =
3 Phase Power W =
Where E =
I =
Alternating Current Power
Direct Current
Volts
Amperes
Watts
Kilowatts
Volts x amperes = Volt amperes
EI
E I x P.F.
ratio of useful power to apparent power
W = PF
ei
Kilowatt Hour
E x I x PF
1.73 x E x I x PF
Average voltage between phases
Average current in each phase
Efficiency Equals .......................................... Power Output
.......................................................................Power Input
Motor Efficiency Equals ................................. H.P. Output
K.W. input x 1.34
Pump Efficiency Equals .........................G.P.M. x total head (ft.)
103,000 x B.H.P.
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