Quote:
Originally Posted by funola
Huh??? Flammable vapor? We are talking engine oil, not propane. There is zero chance of an explosion with the tank or pump evacuating engine oil.
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We are talking the hydrocarbon vapours remaining in the tank. To create the tank vacuum all flammable vapours are being concentrated through the vacuum pump. Since the pump is likely not intrinsically safe the motor arks and sparks and this is where the system will explode. The air driven vacuum devices found on other units are designed to be intrinsically safe and are relatively inexpensive where a electrically driven vacuum pump that is intrinsically safe is not nearly as inexpensive.