Enthalpy; Force; Torque; Density - Honeywell AUTOMATIC CONTROL SI Edition Engineering Manual

GENERAL ENGINEERING DATA

ENTHALPY

Btu per lb of dry air x 2.3258 = kJ per kg of dry air
kJ per kg of dry air x 0.42996 = Btu per lb of dry air

FORCE

Existing Unit
Pound force (lbf)
Gram force (gf)
Kilogram force (kgf)
Newton (N)
EXAMPLE:
15 lbf x 4.448 = 66.72 newtons

TORQUE

Existing Unit
Kilogram Force Meter (kgf-m)
Ounce Force Inch (Ozf-in.)
a
Pound Force Foot (lbf-ft)
a
Pound Force Inch (lbf-in.)
Newton Meter (Nm)
a
Torque is a turning effort caused by a force acting normal to a radius at a set distance from the axis of rotation. The I-P unit
of torque is pound-foot (lbf-ft) or ounce-inch (Ozf-in.). One lbf-ft is equal to one pound acting at one foot from the axis of
rotation. See WORK/ENERGY for foot-pound.
EXAMPLE:
25 lbf-in. x 0.1130 = 2.83 newton meter

DENSITY

Existing Unit
Pounds per cubic foot (lb/ft
Pounds per gallon (lb/gal)
Grams per cubic centimeter (g/cm
Kilograms per cubic meter (kg/m
EXAMPLE:
8 pounds per cubic foot x 16.0185 = 128.15 kilograms per cubic meter
Table 15. Force Conversion Multipliers.
Pound force (lbf) Gram force (gf)
—
0.0022
2.2046
0.22487
Table 16. Torque Conversion Multipliers.
Kilogram Force
Meter
(kgf-m)
—
a
0.00072
0.138257
0.01152
0.10197
Table 17. Density Conversion Multipliers.
Pounds per
cubic foot
(lb/ft
3
) —
7.48055
3
) 62.428
3
) 0.062428
Desired Unit
Kilogram force (kgf)
453.6 0.4536
— 0.001
1000
101.97 0.10197
Desired Unit
Ounce Force Pound Force
Inch Foot
a
(ozf-in.) (lbf-ft)
1388.7 7.2329
— 0.00521
192.0 —
16.0 0.0833
141.61 0.7376
Desired Unit
Pounds per
gallon
3
) (lb/gal)
0.13368
—
8.34538
0.008345
ENGINEERING MANUAL OF AUTOMATIC CONTROL
472
Newton (N)
4.447
0.009807
— 9.807
Pound Force
Inch Newton Meter
a a
(lbf-in.)
86.795
0.0625
12.0
—
8.850
Grams per cubic Kilograms per
centimeter cubic meter
3
(g/cm )
0.016018
0.119827
— 1000
0.001 —
—
(Nm)
9.8067
0.0070618
1.3557
0.1130
—
3
(kg/m )
16.0185
119.827