Basic Facts; Pressure Equivalents - Landa VLP3-1100 Operator's Manaul

VNG/VLP SERIES PRESSURE WASHER
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BASIC FACTS

BASED ON 60 o F
Formula
o
Vaporization Point ( F)
Specific Gravity (Vapor)
Specific Gravity (Liquid)
Lbs. Per Gallon (Liquid)
B.T.U. Per Cubic Foot (Vapor)
B.T.U. Per Lb. (Vapor)
B.T.U. Per Gallon (Liquid)
Cubic Feet Per Lb. (Liquid)
Cubic Feet Per Gallon (Liquid)
Octane Number
Molecular Weight
To calculate running cost:
1 cubic Ft./1,000 B.T.U.
100 cubic Ft./Therm
Therm/Hour
50¢ Therm
Example:

PRESSURE EQUIVALENTS

Simply stated, pressure is the force exerted by a gas or liquid attempting to escape from a container. It is useful to
know how strong this "attempt to escape" is. Pressure can be measured with a manometer or with a pressure gauge.
At the lower levels, it is expressed in "inches of water column" i.e. 1" w.c. Higher pressures are expressed in terms of
the force exerted against a square inch of area. For example, 125 lbs. per square inch (125 psi).
1" Water Column
11" Water Column
1 Lb./Sq. In.
1 Std. Atmosphere
Using natural gas
400,000 BTU Machine
400 cubic feet
4 Therms/hour
4 x .50 = $2.00/hour to run
= 50 Oz./Sq. In.
= 4 Lb./Sq. In.
= 2.04" Mercury
= 14.73 Lbs./Sq. in
PROPANE
C3H8
-43.7
1.522
0.508
4.23
2.563
21.663
91.74
8.607
3.45
125
44.09
11" Water Column
1 Lb./Sq. In.
1" Mercury
OPERATOR'S MANUAL
BUTANE
C4H10
31.1
2.006
0.584
4.87
3.39
21/3-9
1-3/93
7/53
31/9
1
58.12
= 6.35 Oz./Sq. In.
= 27.71" Water Column
= .39 Lb./Sq. In.