Abstract: An orbicular valvular conduit which has no moving parts and is configured to facilitate unidirectional flow of a primary fluid stream by utilizing a counterflowing diverted fluid stream to counteract any opposing fluid stream which flows in the direction opposite the primary fluid stream may include at least one conduit subunit. Each conduit subunit may include a fluid diverging section. A fluid converging section may extend from the fluid diverging section. A valve core may be disposed in the fluid diverging section and the fluid converging section. A primary flow passage may extend through the valve core to accommodate a primary fluid stream. A secondary core passage may be formed by and between the valve core and the fluid diverging section and the fluid converging section.