Rotary Union

A multiple channel rotary union comprising:

• a central shaft comprising two or more fluid channels;
• a housing comprising:
• two or more fluid ports;
• an opening in a bottom face of the housing;
• an interior cavity, wherein the central shaft is partially enclosed within the interior cavity via the opening;
• and
• a first annular ring formed on an interior surface of the housing, the first annular ring having a first side facing the interior cavity of the housing and a second side facing the opening in the bottom face of the housing;
• and
• a bearing rotatably coupling the central shaft to the housing, wherein a first side of the bearing is adjacent to the opening in the bottom face of the housing and a second side of the bearing is adjacent to the second side of the first annular ring;
• and
• a seal assembly forming one or more flow channels between each of the one or more fluid channels of the central shaft to corresponding ports of the one or more fluid ports of the housing, the seal assembly comprising:
• a first stationary seal component physically contacting the interior surface of the housing adjacent to the first side of the first annular ring;
• a first rotating seal component physically contacting an exterior face of the central shaft;
• and
• one or more springs providing a force engaging a first sealing face of the first rotating seal component to a second sealing face of the first stationary seal component.

A dual flow channel rotary union comprising:

• a housing comprising:
• a first housing section having a through bore aligned to a central axis of the housing;
• and
• a second housing section having a partial bore aligned to the central axis of the housing, wherein the through bore of the first housing section and the partial bore of the second housing section form a central cavity of the housing;
• a central shaft at least partially enclosed by the central cavity of the housing, wherein the central shaft comprises a first flow channel and a second flow channel, wherein the first flow channel comprises a check valve;
• a bearing physically secured within a first cavity section of the through bore and a central opening of the bearing is physically secured to a first section of the central shaft;
• a seal assembly comprising:
• a first mechanical seal portion;
• a second mechanical seal portion;
• and
• a spring physically contacting the first mechanical seal portion and the second mechanical seal portion, wherein the first mechanical seal portion forms a first flow channel within the central cavity of the housing and between an inlet port of the second housing portion and an inlet port of the check valve and wherein the first mechanical seal portion and the second mechanical seal portion forms a second flow channel within the central cavity of the housing and between an outlet port of the central shaft and an outlet port of the second housing section.