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Photo of a 3 group espresso machine after the boiler electronics failed causing the machine to overheat, normally not a problem but on this occurrence the safety valve failed to operate at the set safe pressure. The resulting explosion caused several injuries to staff and customers after the machine flew 20 feet across the cafe with the force of the explosion, luckily there was no fatalities. This photo shows what can and does happen, a boiler inspection would have eliminated the chance of this accident happening.
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