Page 805 - Fundamentals of Water Treatment Unit Processes : Physical, Chemical, and Biological

760 Pre-Appendix Tables

TABLE CDQR.2 (continued)
Units and Conversions—Quick Reference
Quantity Symbol From Units Factor To Units Values
Pressure p Pa 1 N m 2
atm 101325 Pa
atm 1.013 bar
atm 10.3327 m water
bar 100 000 Pa
mm Hg 08C 133.322 Pa
psi 6894.757 Pa
kgf=m 2 9.80665 Pa
N=m 2 1 Pa
m water 9.806 246 kPa
Pa 101 325 atm
Pa 100 000 bar
torr 1.00 atm
Revolutions revolution 360 degree
revolution 2p radians
rpm 0.104 719 8 rad=s
Surface tension g N=m J=m 2
(8F) (8C)
Temperature 8F 5=9(8F-32) 8C 50 10.0
8C 8Cþ273.15 K 60 15.6
8C 9=58C þ 32 8F 70 21.1
80 26.7
Velocity v mi=h 1.609 344 km=h 90 32.2
0.447 0400 m=s 95 35.0
ft=s 0.304 8 m=s 110 43.3
knots 0.514 444 m=s 120 48.9
1.85 km=h 130 54.4
140 60.0
1 1
Viscosity, dynamic m poise 1 g cm s
poise 0.1 Pa s
poise 0.1 N s=m 2
cP 0.001 Pa s
Lbf s=ft 2 47.880 26 Pa s
2 1
Viscosity, kinematic n stoke 1 cm s
2
stoke 0.0001 m =s
Volume V gal 0.003 785 412 m 3
acre-ft 1233.489 m 3
barrel 42 gal 0.158 9873 m 3
ft 3 0.028 316 85 m 3
yd 3 0.764 5549 m 3
ounce (US liq) 2.957353 10 5 m 3
Parameters
1 2
Hydraulic loading rate HLR gal min ft 0.000679023 m=s
¼ Q=A(cross section) 0.0407417 m=min
2.444502 m=h
58.667 616 m=d
3 2
ft =min=ft 0.3048 m=min
mgad 0.038 970 574 m=h
2
0.015 9422 gal=min=ft
m=s 1472.7035 gal=min=ft 2
Porosity P 0.35–0.45
Permeability D Darcy 0.987 10 12 m 2
3
2
Overflow velocity v o gpd=ft 2 4.074 14 10 2 m =m =d