Because tank pressures range from 0 to 200 PSI in LPG tanks, these tanks cannot be filled to capacity. ASME tanks are filled to 90% capacity to allow for expansion of gases during increases in temperature.
The recommendation of the local certified professional fuel supplier should be followed when installing storage vessels and fuel piping.
Fuel valves
While the secondary demand regulator supplied with this generator set is designed to close and stop fuel when the engine is not running, it should not be relied upon to completely seal off the fuel system when the engine is stopped. A ruptured diaphragm or a piece of dirt in the regulator could prevent the regulator's valves from seating with a result that gas would continue flowing through the carburetor, into the engine and out into the surrounding air. Since gaseous fuels are heavier than air, they tend to settle in low areas, which could present a serious hazard.
Electric fuel shut-off valves
This type of fuel valve interfaces with the electronic control circuitry of the generator set and is automatically activated to seal off the fuel the instant the engine's ignition system is shut down.
This type of fuel valve is mandated by federal and state regulations in most generator set applications.
Manual Fuel Valves
In addition to the electrical fuel
A manual
For indoor installations by NFPA definition, an automatic positive shut- off valve must be installed to assure that the flow of fuel will be stopped should the engine fail while it is unattended.
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