Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE - Manual (Page 182)

10-20 Reference
Engineering Constants (cont.) Weight
16 oz. = 1 lb.
2.2046 lb. = 1 kg.
2.309 ft. water at 6 ° F = 1 PSI
28.35 gm = 1 oz.
59.76 lbs. = Weight of 1 Cu. ft. of water at 21 ° F
0.062428 lb. per cu. ft. = 1 kg/cu. m
62.355 lbs = Weight of 1 cu. ft. water a t 6° F
8 (8.32675) lbs. = Weight 1 gal. water at 62 ° F
Power
1.3410 HP = 1 kW
2.545 BTU per hr. = 1 HP
33,000 ft.-lb. per min. = 1 HP
550 ft.-lb. per sec. = 1 HP
745.7 W = 1 HP
Area
10.764 sq. ft. = 1 sq. m
1,273,239 circular mils = 1 sq. in.
144 sq. in. = 1 sq. ft.
645 mm
2
= 1 sq. in.
9 sq. ft. = 1 sq. yd.
.0929 sq. m = 1 sq. ft.
Mathematic
1.4142 = square root of 2
1.7321 = square root of 3
3.1416 = p ratio of circumference of circle to diamete
= ratio of area of a circle to square of radius
57.296 degrees = 1 rad. (angle)
0.7854 X diameter squared = area of a circle
Pressure
14.223 PSI = 1 kg per sq. cm = 1 “metric atmosphere”
2.0355 in. Hg a t 3 ° F = 1 PS
2.0416 in. Hg a t 6 ° F = 1 PS
2,116.3 PSF = 1 in. water a t 6 ° F
760 mm Hg = atmospheric pressure at 0 ° C
.07608 lb. = weight 1 cu. ft. ai r a t 6° F and 14.7 PSI