| 摘要 |
<p>A mechanically operated proportional flow control valve includes a valve spool 9 which is moveable between two end limits delimiting a regulating range. A device 20, 22 for selectively limiting the regulating range of the valve 8 can be used to block "locked-in" positions F', RH' of the spool 9 at the end limits of the regulating range. The device includes a locking bar 20 which has locking formations 28, 29 which engage a pin 22 on a lever 11 connected with the spool 9.</p> |
