| 摘要 |
<p>The valve for phased emptying and automatic closing of tanks is esp. for use in toilet-flushing systems. It is made up from two or more overflow pipes sited one above the other, with the outflow sealed off by rubber sealing. The two pipes can be coupled together. Staged and complete outflow opening can be effected by a release lever. The components of the valve system can be made of plastics, metal or rubber. Refurbishing of existing systems is simplified.</p> |
