| 摘要 |
<p>A valve assembly comprising a valve body (51;81), an obturator (2;55;85) rotatably mounted in the body (51;81) and a transducer (1;9;62,63;80;92,93;100) connected to or located adjacent the obturator (2;55;85) in order to determine the position thereof. The transducer may comprise e.g. a potentiometer (9;80; 100) or a Hall effect device (1;62,63;92,93). <IMAGE></p> |
