Abstract: A device for controlling the transfer of liquefied gas from a storage tank to a consumer apparatus or circuit, comprises a closing valve placed in the transfer circuit linking the storage tank and the consumer apparatus. A device locks the valve in the operative or inoperative state, to maintain a valve in the open or closed position. Control means normally attract the valve in the direction of opening when the valve is closed and conversely in the direction of closure when the valve is opened. A working device controlled from outside acts on the locking device to move it from the operative to the inoperative state.