Another characteristic of LPG is that it is heavier than air. Therefore suction fans and complete venting are necessary in maintenance pits and confined low areas. LPG is an odorless gas. An odorant is added to LP Gas to help detect leaks. If at any time this odor is detected, immediately shut off the engine and look for the cause of the leak. Again, make sure that the area is well ventilated.
PRECAUTIONS There is always danger of explosion and fire with any fuel, and LP-Gas is no exception. LP-Gas is a liquid while under pressure in a tank, but vaporizes almost instantly, at ordinary temperatures, upon its release. Escaping LP-Gas will generally disperse in moving air. But, since it is heavier than air, it seeks the lowest level. Thus, it can drift a considerable distance from the source and lie as an explosive mixture for some time before it completely disperses. It is therefore important to have adequate ventilation when repairing an LP-Gas system, or changing or filling tanks. If the scent of the added odorant is detected, take immediate steps to eliminate leaks in the LP-Gas system. Some gas usually escapes when fuel tanks are changed, but even this small amount can be reduced or eliminated with proper techniques. The shut-off valve on the tank should be completely closed during this operation. A screw or snap-type quick disconnect coupling is attached to the shut-off valve. It requires no tools to operate. When disconnected it automatically seals off any flow through the valve and the hose. For maximum safety, however, always close the shut off valve, run the engine until it stops, and turn off the ignition switch before discon necting the coupling. Fuel Used: HD-5 Propane
HD-5 propane is the most efficient LPG fuel for internal combustion engines used in mobile units which have constantly varying engine speeds and loads. HD-5 propane contains a minimum of 90 percent propane, a maximum of five percent propylene, and a maximum of five percent contaminants such as oil, water and corro sive compounds. This fuel has been developed to improve engine performance and to prevent knock through higher octane ratings.
Fuel Systems page 6
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