| 摘要 |
A ball valve ( 10 ), in particular for controlling the amount of medium supplied to a heating or cooling system, is adapted such that the characteristic of the valve may be determined so that it may be adapted to its use in the heating or cooling system. The ball valve consists of a housing having a ball valve body ( 4 ) which is rotatable in two cups ( 3, 5 ) of a corresponding ball shape. An insert ( 7 ) is arranged at the discharge side of the housing, said insert having a concave ball face which corresponds to that of the ball valve, and which is provided with a slot or recess ( 10 ) which, together with the through bore of the ball, defines the outlet opening of the valve. A desired characteristic of the valve may be provided by imparting a suitable shape to the slot ( 10 ). The insert is fixed in a holder ( 6 ) in the valve housing by means of axially extending teeth ( 13 ) in the face of the housing which receives the insert. The teeth generate grooves in the cylindrical contact face of the insert when the insert ( 7 ) is pressed into position, whereby it is fixed securely in the circumferential direction. It may be secured in the axial direction by means of rearwardly directed resilient legs ( 11 ) which, when the insert is inserted, jump in on the rear side of a recess in the holder. This results in a simple and secure fixing of the insert.
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