摘要:
It defines an enclosure inside which a fluid under pressure circulates, causing the deformation of said tube (4) and consequently the displacement of the pointer needle (5) of the pressure gauge (1); the wall (8) of the tube is provided with at least one portion (7) of smaller thickness. In case of excess pressure, the Bourdon tube breaks at this weaker portion. The pressure discharged into the inner section of the housing is therefore also lower and its effects are more easily controllable.