| 摘要 |
A non-pressurized fluid transfer system for stock rotation of liquids packaged in large non-pressurized containers such as 55 gallon drums is described. Two drums or sets of drums are used and the system automatically changes over from a first drum to a second drum when the first drum no longer contains liquid. Automatic change-over between the first drum and second drum is effected in response to a signal created by a float switch in the drum's fluid line. This float switch detects the absence of liquid in the first drum and the system automatically switches to the second drum in order to maintain continuity of the dispensing process. When the first drum is replaced with a new drum, the operator pushes a purge button and the fluid line connected to that drum is purged of any air. Thus, the dispensing of fluid may be continuously maintained without any interruption from changing drums, and without introducing air into the dispensing line.
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