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VAPOR WITHDRAWL
With a vapor withdrawal system, the LP fuel is vaporized in the fuel tank by heat input from the
ambient temperature. The pressure is reduced to about 11” water column (0.4psi) on the outlet
side of the primary regulator. The vaporized fuel is then brought to the engine and demand regu-
lator on the engine reduces the pressure even further before it engine the carburetor (mixer).
Approximately 10 to 20% of the tank capacity is needed for fuel expansion from the liquid to the
vapor state. The user should be aware that when the ambient temperatures are low and engine
fuel consumption is high, the vapor withdrawal system may not function effi ciently. Ambient tem-
perature around the supply tank must be high enough to sustain adequate vaporization for the
system or it will not deliver the needed fuel volume.
LPG PIPING DIAGRAM
NATURAL GAS PIPING DIAGRAM
(Not Supplied)
(Not Supplied)