| 摘要 |
<p>A device used in liquid fuel dispensing systems to inhibit the infiltration of air into the product dispensing line due to thermal contraction. A fluid tight container (44) is connected with the product line (24) and supplied with fuel in an amount sufficient to make up the liquid volume loss caused by thermal contraction. A vent (78) for the container (44) is normally closed by a valve (62) under normal pressures of the dispensing system. When thermal contraction reduces the product line (24) pressure far enough to create a vacuum, the valve (62) opens the container vent (78) so that the fuel in the container (44) can flow into the product line (24) to keep it full or liquid and avoid drawing air into the line.</p> |
