Patent ID: 6142162
Filing Date: 2000-11-07
Classification: G05D,Y10T

Abstract:
A system for odorizing natural gas flowing through a main line, comprising:a bypass line adjacent to a main gas line;an odorant tank connected to the bypass line, wherein bypass gas flows through the bypass line, through the odorant tank, and into the main line;a control valve in the bypass line, wherein bypass gas flows through the odorant tank and into the main gas line only when the control valve is open;a meter on the main gas line which monitors gas flow through the main gas line;a controller connected to the meter and the control valve, wherein the controller opens the control valve for a predetermined dwell time, proportional to an amount of bypass gas needed to odorize gas in the main gas line, each time a preselected quantity of gas flows through the main gas line.