| 摘要 |
<p>An improved venturi eductor (10) for proportional dispensing of chemicals into flowing water includes a large antisiphoning air gap section (17) to satisfy water system regulations. The air gap section includes an outer wall (31) and an inner wall (36) with a gap (45) between the walls. Both walls include offset windows (33 and 39) that provide a circuitous path from the center of the air gap to the exterior of the unit. Passageways (35) extend from the gap to a downstream section of the unit to carry away fluid that might collect in this gap. Further, the shape and location of various orifices within the device creates a slight suction to further limit overspray.</p> |
