The anti - fraud for distribution network of fluid.

摘要

The lock consists of a groove (12) provided in a connecting tube (2) for a (10), a split ring (13) called the locking item, made from deformable elastic material, and a shouldered nut (4) covering the locking ring (13). This ring (13) prevents the sliding of the nut (4) into its re-screwing position once it has been unscrewed after its first screwing operation. The lock is set (14,20,21) to allow the first screwing up of the fitting, by not opposing the sliding of the nut (4) in relation to the tube (2) and then locked (12,13) after the first unscrewing of the nut (4) by the moving of the ring (13) into its effective opposition to a position where the nut (4) can be re-screwed.