Modular air valve system

A modular valve system comprising:

• a first valve configured to connect to one or more additional valves, including:
• a first housing having a first inlet and a first outlet with a cylindrical flow path through the first housing defined between the first inlet and the first outlet along a flow axis, wherein a diametral plane is defined diametrically spanning the cylindrical flow path;
• a mounting flange extending from the first housing at the first inlet or the first outlet configured to mount the first valve to a first structure;
• a first connecting flange extending from the first housing via a first housing extension in a first direction configured to connect the first valve to a second valve, and a second connecting flange extending from the first housing via a second housing extension in a second direction opposite the first direction configured to connect the first valve to a third valve or a second structure;
• a first valve disc mounted to a first shaft disposed within the first housing along a rotation axis for rotation between a first position of the first valve disc allowing a first flow amount through the cylindrical flow path and a second position of the first valve disc allowing a second flow amount through the cylindrical flow path,
• wherein a first end of the first shaft extends through the first housing extension and through the first connecting flange and is configured to connect to a second shaft of the second valve, and
• wherein a second end of the first shaft extends through the second housing extension and the second connecting flange and is configured to connect to a crank of the first valve or to a third shaft of the third valve, and
• wherein the first valve is symmetric about the rotation axis and is symmetric about a vertical axis, and
• wherein the first valve is configured to be reversible such that the first inlet can be a first inlet or a first outlet and the first outlet can be a first outlet or a first inlet.