Method for adjusting air to liquid ratio in vapor recovery system

摘要

An air to liquid regulator valve for use with a vapor recovery system that recovers vapors expelled from a vehicle receiving fuel through a fuel supply passage and returns the vapors to an underground storage tank through a vapor return passage in a service station environment. The regulator valve includes a housing defining a fuel flow path in fluid communication with the fuel supply passage and a vapor return path in fluid communication with the vapor return passage, a vapor return orifice defined by the housing and disposed between a first portion and a second portion of the vapor return path, and a vapor flow bypass in fluid communication with the first portion and the second portion of the vapor return path such that the flow of vapors through both the vapor flow bypass and the vapor return orifice is possible.

主权项

1. An air to liquid regulator valve for use with a vapor recovery system that recovers vapors expelled from a vehicle receiving fuel through a fuel supply passage and returns the vapors to an underground storage tank through a vapor return passage in a service station environment, comprising:
a housing defining a fuel flow path in fluid communication with the fuel supply passage and a vapor return path in fluid communication with the vapor return passage; a vapor return orifice defined by the housing and disposed between a first portion and a second portion of the vapor return path so that vapor flow occurs through the vapor return orifice whenever fuel is dispensed through the fuel supply passage; a vapor piston including a metering element, the metering element being insertable into the vapor return orifice to regulate the flow of vapors therethrough, and the metering element being configured to prevent the flow of vapors through the vapor return orifice when the metering element is fully seated in the vapor return orifice; and a vapor flow bypass in fluid communication with the first portion and the second portion of the vapor return path such that the flow of vapors through both the vapor flow bypass and the vapor return orifice is possible.