| 摘要 |
A continuous magnetic motion position indicator (1) detects the position of a clapper valve. The clapper valve comprises a valve body and, disposed within the valve body, a clapper and a valve stem. The continuous magnetic motion position indicator (1) comprises: (a) a magnetic joint assembly comprising a first set of magnets (30) disposed inside the valve body and a second set of magnets (26) located outside the valve body that operatively interface with the first set of magnets, and (b) a remote position transmitter and/or a local visual indicator (18). In operation, the magnetic joint assembly transmits rotary movement of the clapper from the valve stem to the remote position transmitter and/or local visual indicator (18), without the presence of a dynamic seal interface. |
