DEFO Catalogue-IN.qxd - Crystal Fountains

96
Engineering Data and Conversion Factors
Quick Conversion Factors
Convert From
Flow
Multiply By Convert Into
USGPM .0631 Litres/second
USGPM 3.785 Litres/minute
USGPM 227.3 Litres/hour
Litres/sec. 15.85 USGPM
Litres/min. .264 USGPM
Litres/hour .0044 USGPM
Cu Ft./sec. 448.83 USGPM
Cu M/min.
Pressure
264.2 USGPM
PSI 6.895 KPA
PSI 2.310 Ft. Head
KPA .145 PSI
KPA .334 Ft. Head
Ft. Head 2.990 KPA
Ft. Head 0.433 PSI
Ft. Head 0.305 Metric Head
Ft. Head
Volume
3.280 Ft. Head
U.S Gals. 231.0 Cu. In.
U.S Gals. .1337 Cu. Ft.
U.S Gals. 3.785 Litres
U.S Gals. .0038 Cu. Metres
Litres .2642 U.S. Gals.
Litres .0353 Cu. Ft.
Cu. Metres 35.311 Cu. Ft.
Cu. Metres 264.2 U.S. Gals.
Cu. Ft. 7.48 U.S. Gals.
Cu. Ft. 28.329 Litres
Cu. Ft.
Weight
0.028 Cu. Metres
U.S Gals. 8.35 Lbs.
Litres 2.2 Lbs.
Cu. Ft. Of Water 62.46 Lbs.
Cu. M.Water
Length
22.06 Lbs.
Inches 2.54 Centimeters
Feet .3048 Metres
Metres 39.37 Inches
Metres
Horsepower
3.28 Feet
HP .746 Kilowatts
HP 745.7 Watts
Kilowatts
U.S. Pump Charts
1.34 HP
GPM (60 cy) .80 GPM (50 cy)
Head (60 cy) .60 GPM (50 cy)
Pipe Flow Guide
Pipe sizes and capacities are those recommended
as good practice for fluid velocities on hydronic
applications.
pipe flow pipe flow
size lpm size lpm
40 mm 38 - 95 125 mm 757 - 1892
50 mm 76 - 189 150 mm 1249 - 3028
75 mm 208 - 511 200 mm 2649 - 4920
100 mm 435 - 1041 250 mm 4731 - 6624
Waterfall Requirements
(per lineal metre)
spill lpm maximum
thickness fall height
2.5 mm 62 0.30 m
5.0 mm 125 1.00 m
7.5 mm 187 1.25 m
10.0 mm 250 1.50 m
12.5 mm 312 1.75 m
15.0 mm 374 2.00 m
17.5 mm 436 2.25 m
20.0 mm 498 2.50 m
22.5 mm 558 2.75 m
25.0 mm 620 3.00 m
Example: To determine the lpm requirements
for a 3 metre long waterfall with a
1metre fall height and a 7.5 mm spill
thickness, multiply 3 x 187 = 561 lpm.
Note: Turbulent water may require greater flow.
Lower pool should be approximately two
times larger than upper pool to handle
start-up and shut-down variables.