| 摘要 |
The safety valve for fluids subject of this Patent is a spherical valve for a straight or right-angle (90 DEG ) flow and a quarter-turn. Its structure comprises: a box (1) having a small central cylindrical recess (2) on its bottom, and two diametrically opposed notches (6) in its neck (5). A spherical body (4) provided with two throats (8) on its driving shaft (7) and a central cylindrical projection (3) on the bottom end of the axis of longitudinal symmetry. An intermediate tube-shaped part (10) between the shaft (7) of the body (4) and the neck (5) on the box (1), provided with two peripheral throats (11). A washer (13) provided with two diametrically opposed radial projections (14). A manual control (15) provided with two diametrically opposed dissymmetrical projections (16)-( 17). The sealing means are: two O-ring seals (9) on the driving shaft (7) and a further two (12) on the intermediate part. Two annular elastic seals (18) between the box (1) passages and the spherical body (4). A rim (19) provided by drawing in the top edge of the neck (5) after fitting the washer (13) in its housing, thereby to ensure that it is locked therein, that the valve is sealed and that it is altogether inviolable and even tamper-resistant, and therefore that the valve is safe against deflagration or explosion. <IMAGE> |
