| 摘要 |
The flow rate adjusting and indicating valve device for a fluid, comprises a duct (10) for the passage of the fluid having a flow rate adjusting valve (13), and a by-pass channel (14) branched off from the passage duct (10), in which normally closed on-off valve means (19) for stopping the flow through the by-pass channel (14) are provided; the on-off valve means (19) comprise at one end of the by-pass channel (14), a closing member (20) movable between a closed position and an open position. The device also comprises a piston (22) movable in the by-pass channel (14), having a side magnet (32) magnetically coupled with a ferromagnetic indicating member (23) for indicating the flow rate, which in turn is movable within a guide channel (24) made of transparent material, longitudinally extending along one outer side of the by-pass channel (14). |
