Safety device with automatic activation

摘要

Safety device includes annular obturator (4) mounted on external periphery of tube (1). Obturator is radially separated from pipe (K) by annular space (EA) which offers to gas a peripheral flowpath. As soon as flowrate in pipe reaches high levels, obturator is radially bulges out, due to important energy loss of gas in movement, and obturator blocks off peripheral flowpath.