| 摘要 |
The invention relates to a packing gland (4) for spray, of the type subsequently closing a chamber (2) of a product to be sprayed in which there operates an obturating needle (3) traversing the packing gland in mobility and tightness conditions. It has a base body (5) provided with means (6) for the tight fixing to the body of the gun, which base body configures a cylindrical bowl provided at the bottom with a hole (7) for the passage of the mentioned needle, there being arranged inside the mentioned body a tight packing carried out with two rigid scrapers (8,10) between which a flexible gasket (9) is arranged, said tight packing being permanently pressed in the axial direction by a spring (12), the components of the mentioned tight packing having a shape selected from a cup and a conical washer shape such that the axial pressure on the components tends to a deformation with narrowing on the needle. |
