Vent valve assembly

A vent valve assembly, comprising:

• a housing having an outer wall structure, an inner wall structure, and a valve orifice, the outer wall structure and the inner wall structure defining a chamber therebetween;
• a float located inside the chamber and configured to be translatable relative to the housing along an axis, the float having an orifice extending along the axis, wherein the inner wall structure of the housing is disposed within the orifice of the float, and wherein an inner surface of the orifice of the float is positioned to face the inner wall structure of the housing;
• one or more guiding features located on the inner surface of the orifice of the float;
• one or more mating features located on the inner wall structure of the housing and configured to mate with the one or more guiding features;
• a flapper disposed at an upper surface of the float and positioned in alignment with the valve orifice;
• and
• a flapper guide located at the upper surface and configured to engage with the flapper;
• wherein the flapper guide allows opening and closing of flapper and keeps the flapper in alignment with the valve orifice, and
• wherein the orifice of the float is laterally offset from the valve orifice.