Abstract: Pressure compensation device (100) deployed in an element that contains a flammable substance that compensates pressures between interior (101) of the element and exterior atmosphere (102) in which said element is deployed, by means of a continuous primary circulation (300) of air through primary channel (103) in said device (110) that communicates interior (100) and exterior (102) of the element, further comprising a secondary channel (104) integrated in the device (100) itself, communicating interior (102) and exterior (102) of the element, comprising said secondary channel (104) in the interior zone of the element a sheet (105) such that, in the event primary continuous circulation (300) of air through primary channel (103) is interrupted, said continuous circulation continues through secondary circulation (400) of air to interior (101) of the element, this secondary circulation (400) of air being capable of breaking sheet (105) of secondary channel (104).