| 摘要 |
<p>The valve is controlled by a diaphragm operated control lever, and the valve seat is between the inflow and outflow channels in the housing. A valve chamber behind the valve communicates through a hole with a housing chamber connected to the outflow channel. A regulating device has a display element and a control element which varies the clear section of the communication hole, so that the required volume of flow in a unit of time is achieved. The display unit is combined with the control element which controls the above hole by a spindle on which a scale disc for the display device is mounted, for the required flow setting.</p> |
