Patent ID: 7438275
Filing Date: 2008-10-21
Classification: F16K

Abstract:
1. A ball valve ( 1 ) for use in heating or cooling systems, for the control of a flow of a medium to be heated or cooled, the ball valve comprising a valve housing having a valve ball ( 4 ) which has a through bore controlled by corresponding ball-shaped cups ( 3 , 5 ), an insert ( 7 ) arranged in a discharge side of the valve housing, said insert engaging the ball and having an internal ball-shaped surface corresponding to a surface of the ball, and wherein said ball-shaped surface is formed with a slot or recess ( 10 ) which, together with the through bore of the ball, defines the outlet opening of the valve, the shape of this slot or recess determining the flow characteristic of the valve by the relation between the angular position of the ball and the flow, a part of the housing of the valve receiving the insert, the part of the housing having axially extending teeth ( 13 ), the insert is arranged such that, when the insert is inserted into the housing, the teeth form grooves in the insert.