| 摘要 |
<p>The installation has a ball cock (18) between the pressure transmitter and the process line. The ball cock has a ball casing (1), as a valve body, and process line and pressure transmitter connections (2,3). A ball (7) in the ball casing rotates between open (6) and closed positions and contains an adjustable passage bore (8) in the ball casing. Two ball seats in the directions of the pressure transmitter and process lines have spring-biased and sealed sliding sleeves (14,15), each with a seal packet (19,20). A ball space (25) between the sealing packets opposite the connections is not directly sealed. The ball casing has a drain connection in the ball space area closed by a control valve. An Independent claim is included for a method for leak testing and to dismantle a measuring device, especially a pressure transmitter, for the installation.</p> |
