Patent ID: 7987870

Claim:
A protection device for protecting an apparatus against overpressure (P 2 )in a fluid feeding apparatus, the protection device including a through hole for passing the fluid and a shutter movable between an open position and a closed position for shutting a first segment of the through hole, wherein the device also includes a shutter valve member movable between an open position and a closed position for shutting a second segment of the through hole, a trigger means for simultaneously triggering both drive of the shutter and drive of the valve member from their open positions towards their closed positions in response to overpressure (P 2 ) in the through hole, a bleed passage opening to an exterior of the device for purging at least an intermediate segment of the through hole when the valve member is in its closed position, but not when the valve member is in its open position, the intermediate segment being located downstream from the valve member, and wherein the shutter is downstream from the valve member and is adapted to open the bleed passage before reaching its closed position.