Patent ID: 7900653
Filing Date: 2011-03-08
Classification: F16K

Abstract:
1. A two-way ball valve ( 10 ) for liquid and/or gaseous flowing media, with a valve fitting ( 12 ) consisting of two interconnected housing parts ( 22 , 28 ) in which a ball ( 18 ) with a bore ( 20 ) for the media throughflow and with a drive shaft ( 68 ) running perpendicularly with respect to the bore ( 20 ) is mounted rotatably, and in which are arranged coaxially with respect to the longitudinal axis (L) of the valve fitting ( 12 ), on both sides of the ball ( 18 ), sealing half shells ( 40 , 42 ) which butt one against the other and which surround the ball ( 18 ) and completely fill a dead space ( 38 ) between the valve fitting ( 12 ) and the ball ( 18 ), the sealing half shells ( 40 , 42 ) having in the axial direction (L) in each case an end-face orifice corresponding at least to the cross section of the bore ( 20 ) of the ball ( 18 ), and having, on the annular surfaces butting one against the other, in each case a semicircular radial orifice for the drive shaft ( 68 ), characterized in that the sealing half shells ( 40 , 42 ) lie on the ball ( 18 ) in the region of their end-face orifices only and are at a short distance (a) from one another so as to form a narrow sickle-shaped annular gap ( 56 ).