METER PROVING METHOD AND APPARATUS

摘要

Meter proving method and apparatus of the bidirectional type for calibrating liquid flow devices. It employs a four-way diverter valve of the gate type which is connected to the ends of the metering loop and which directs the flow in one direction or the other through the loop. The diverter valve is power operated and capable of rapid movement between operating positions. A leak detecting means is incorporated with the diverter valve and is used to indicate leakage past the sealing assemblies which would interfere with the accuracy of a metering run. Means including an electronic system serves to provide an automated cycle of operation.