Vapor elimination liquid proving system with top fill and bottom drain prover

摘要

A liquid proving system is provided with a small volume liquid prover draining into a liquid holding tank that has capacity for multiple proving measurements. The small volume liquid prover is top-filled and bottom-drained. A liquid holding tank baffle assembly contains saturated vapor from an initial number of fills of the liquid holding tank within the small volume prover to improve overall accuracy of the proving measurements. When liquid is pumped into the prover evaporation of the liquid being pumped into the prover, and release of vapors from the prover and into the entire holding tank, is inhibited due to the saturated vapor environment established by a saturated vapor volume in the prover, which results in a more accurate prover measurement of liquid pumped into the prover. The saturated vapor volume is contained with a vapor tank baffle assembly in the liquid holding tank; a vapor conduit connecting the interior of the liquid holding tank to the interior of the prover; and the interior volume of the prover.

主权项

1. A small volume bottom drain liquid proving system comprising:
a small volume prover comprising an upper neck section, the upper neck section having a top fill opening for receiving a liquid, a central section for accumulating the liquid, and a drain section, the drain section having a bottom fill opening; a gauge in fluid communication with an interior prover volume of the small volume prover to measure a volume of the liquid in the interior prover volume of the small volume prover; a prover drain device for controlling the release of the liquid in the small volume prover, the prover drain device disposed below the bottom fill opening; a liquid holding tank for receiving the liquid released from the small volume prover by the prover drain device through a tank prover opening disposed below the prover drain device; a vapor conduit connecting an interior prover neck volume of the upper neck section to an interior tank volume of the liquid holding tank by a tank vapor conduit opening; a vapor tank baffle assembly disposed in the holding and positioned below the tank prover opening and the tank vapor conduit opening to generate a liquid vapor from the liquid released from the small volume prover and to contain the liquid vapor within the vapor tank baffle assembly and to direct the liquid vapor into the vapor conduit via the tank vapor conduit opening; a prover top fill opening self sealing assembly having a top self sealing opening that opens when a liquid dispensing nozzle for supplying the liquid to the interior prover volume is pushed against the top self sealing opening and forms a substantially vapor tight seal around the liquid dispensing nozzle; and a vent connecting the interior tank volume of the liquid holding tank to atmosphere.