| 摘要 |
The combination of a chemical feeder for liquid circulating systems comprising a casing provided with a vertically adjustable weir, and a disposable container for chemicals for treatment of the liquid which container is receivable within the casing. The container is provided with an opening for extension therethrough of the weir to a preselected height consonant with the desired concentration of the solution to be formed. The liquid is introduced into said container from the feeder for dissolution of the chemical with the resulting solution flowing downwardly through the weir for ultimate discharge to the associated system.
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