Printable ventilator-free respiratory: Venturi Valve

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Discover the full range of geometries hidden in project folders! Valve utilizes the Venturi effect to create underpressure within a tube consisting of three distinct parts: a convergent section (nozzle), a constant section (throat), and a gradual expansion (diffuser). Due to oxygen flow, underpressure is generated within the nozzle, effectively drawing air into the valve. The valve operates using a stream of pure oxygen with a consistent flow rate of 10-20 liters per minute. Two separate streams converge in the diffuser: one composed entirely of oxygen (100% O2) and the other comprising ambient air (21% O2), resulting in a high-flow, high-oxygen stream at the outlet. Oxygen supply connection: 5-6mm hose Aperture connection: ISO 5356 22M Rev. 5 FiO2 / flow: - 40% / 60 liters per minute (nominal, adjustable via oxygen streams) Rev. 4 FiO2 / flow: - 40% / 42 liters per minute - 37% / 50 liters per minute - 34% / 59 liters per minute - 30% / 86 liters per minute - 28% / 120 liters per minute