Liquid discriminating vent valve

摘要

A valve assembly includes a housing. A membrane supported by the housing such that the membrane covers a vapor passage defined by the housing. The membrane allows the passage of vapor through the membrane and prevents the passage of liquid through the membrane. A flow control feature is supported by the housing and at least partially controls flow of a vapor to the vapor passage. The flow control feature enables variable flow of vapor to the vapor passage.

主权项

1. A valve assembly for a tank comprising:
a housing configured to be supported by the tank and defining a vapor passage; a membrane supported by the housing such that vapor in the tank must flow through the membrane to enter the vapor passage; wherein the membrane is configured to allow the passage of vapor and prevent the passage of liquid through the membrane; a flow control feature supported by the housing to at least partially control flow of vapor through the membrane to the vapor passage by providing variable flow to the vapor passage; wherein the housing defines a first housing opening and a second housing opening, both of which extend between the membrane and the vapor passage; and wherein the membrane abuts the housing at both of the housing openings.