| 摘要 |
In the present invention, there is disclosed a flow rate watch-dog (2), particularly gas flow rate watch-dog for automatic closing a line flown by a medium, consists of at least one housing (4), comprising two connecting openings (8a, 8B) with at least one valve seat (20a, 20b) whereby said housing has an external circumferential surface (10) and an internal circumferential surface (14) and defines a through-flow channel (6) extending from the first connecting opening (8a) to the second connecting opening (8b), a closing body (26) movable inside said housing (4) relative to the first valve seat (20a) of the housing (4) and a tensioning mechanism, which acts on the arrangement of the closing body (26) arranged at a certain distance from the first valve seat (20a). Inside the housing (4), there is arranged at a certain distance from the first valve seat (20a) alongside the through-flow channel (6) another valve seat (20b). Inside the housing (4), there is further arranged an adapter (32) comprising said another valve seat (20b). On the housing (4) external circumferential surface (10), there is in the housing (4) material performed external thread (13) in the region of the first connecting opening (8a). In the housing (4) material, on the internal circumferential surface (14), there is performed in the region of the second connecting opening (8b) and internal thread (16) that is complementary to said external thread (12). |
