Patent ID: 7874195
Filing Date: 2011-01-25
Classification: G01F

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