PROPANE SYSTEMS — 7
150
20 08 CONTESSA
Tank Operation
Manually open the primary shut-off
valve located on the propane tank.
Turn off the primary valve on the
propane tank when the tank is being
lled, when driving, in between trips and
when in storage.
Hand-tighten the primary valve only.
DO NOT use a wrench or pliers. This
will over-tighten the valve. The primary
valve is designed to be closed by hand.
Over-tightening may permanently
damage the valve seat.
NOTE:
In some States and Canadian provinces,
it may be illegal to drive the motorhome
while primary valve on the propane
tank is open.
PROPANE FUNDAMENTALS
The above capacities allow for 20% vapor space on each cylinder.
Data taken from the National Fire Prevention Association (NFPA).
Pamphlet #58-1998.
#Capacity
Gallon
Capacity
BTU Capacity
5 1.18 107,909
10 2.36 215,807
11 2.59 237,387
20 4.72 431,613
30 7.08 647,420
40 9.43 863,226
NOTE:
Propane fundamental information is not a complete
guide for the use of propane tanks or appliances. In
cold climates keep propane level above 50% to keep
vaporization of propane at the highest level.
020155b
050272b
Located in Curbside Fuel Bay
PROPANE STATISTICS
Pounds Per Gallon 4.24
Specic Gravity of Gas 1.50
Specic Gravity of Liquid .504
Cubic Feet Gas Per Gallon of Liquid 36.38
Cubic Feet Gas Per Pound
8.66
BTUs Per Gallon
91,502
BTUs Per Gallon
21,548
Dew Point in Degrees Fahrenheit
-44˚ F
Vapor Pressure at 0
˚ F 31
Vapor Pressure at 70
˚ F 127
Vapor Pressure at 100
˚ F 196
Vapor Pressure at 110
˚ F 230
Flash Point
842˚ F
BASIC FACTS ABOUT PROPANE
Propane detectors are a federal requirement
on all propane equipped recreation vehicles.
Propane is a by-product produced by rening oil.
Odor is added to propane after the rening
process for the purpose of detection.
Each liquid gallon of propane produces 91,502
BTUs (British Thermal Units).
Temperature affects pressure of propane.
Internal tank pressure can exceed 200 psi.
Tanks or valves contain pressure relief valves.
The relief valve opens at 125% above tank rating.
Propane stops vaporizing at -44˚ F.
Standard propane operating pressure is 11" of
Water Column or approximately 6 ¼ ounces
per square inch.
An inch of Water Column is a measurement
of applied pressure to one side of a U-Tube
½ filled with water at sea level. The amount of
pressure required to raise the water level 11",
represents 11" of Water Column.
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