Patent ID: 6412756
Filing Date: 2002-07-02
Classification: B01J,F16K

Abstract:
A shut-off device (1) which can be fitted between a supply pipeline (2) and a discharge pipeline (3), in the form of a ball valve, comprisinga housing (4); a housing flow passage with an inlet section (5) and an outlet section (6); a shut-off ball (7) with a shut-off ball flow passage (8), the shut-off ball (7) being mounted in the housing (4), by means of two sealing rings (9, 10); an actuating drive (11) for the shut-off ball (7); said inlet section (5) reaching into the shut-off ball flow passage (8), which is designed in such a manner that, in the event of the ball valve closing through rotation of the shut-off ball (7), that part of the inlet section (5) which reaches into the shut-off ball flow passage (8) is accommodated in a slot in the shut-off ball; wherein the shut-off ball flow passage diameter is as small as possible, in order to obtain a maximum possible distance to a cone of poured material, but large enough to allow unimpeded flow of bulk material; and chamfer (12) and chamfer (13), are present in the shut-off ball flow passage (8) below the inlet section (5), and at an exit into the outlet section (6).