| 摘要 |
The seat valve (V) includes a valve seat (5) in a casing, between a first chamber (2) supplied with an irregular pressure and a second chamber (3) supplied with a regulated pressure. A control element (6) is movable in the first chamber, from a closed position in an opening direction, relative to the valve seat. A control piston (9) is adjustable in the sealed second chamber, is affected by a regulation force (K) in the opening direction of the control element, against the regulated pressure, and engages through the valve seat with the control element. The control piston engages with a position sensor (M), by which a signal is produced in dependence on the position of the control piston, for the supervision of the respectively adjusted pressure. The signal is held in a predetermined, approximately constant proportion to the regulated pressure over the entire control range of the seat valve. |
