| 摘要 |
<p>Ball valve (1) comprising a ball shutter (7) rotatably and tightly housed in a valve body (2) in which in a component of the ball valve formed by the shutter (7) or the body (2) of the valve (1) a contoured opening (16) is provided which may have different contours. With a lobed contour the valve is adapted to be used as a temperature adjusting valve whereas with a 'saddle'-shaped contour the valve may be used both as a temperature adjusting valve and as a balancing valve in heating plants.</p> |
