Corona Virus Mask & Respirator-free reanimation Venturi's valve
Disclaimer
Valve has not been tested and certified for medical use, however it has been designed to be safe. Author takes no responibility for failure of the device. Be aware, that homemade production wit a use of 3D printer is charged with imperfections and can’t be validated. Please be aware, that oxygen is a flammable gas and may explode if leak will occur. This is subsonic device, however it may generate acoustic effect, that will damage hearing. Use ear-protection..
Introduction
Valve uses Venturi effect to generate underpressure in a tube consisting of three parts - a convergent section (nozzle), followed by constant section (throat), ending in a gradual expansion (diffuser). Due to the oxygen flow underpressure is generated in the nozzle and air is beeing sucked into valve.
Valve is powered with a stream of pure oxygen with the flow rate 10 lpm. Two streams are mixing in diffuser: oxygen (100% O2) + air (21% O2) resulting in high flow, high oxygen stream at the outlet.
Production
Valve is designed to be printed with 3D printer vertically and horizontally to cover whole range of SLA, SLS, CJP, FDM, DLP etc. Printing devices. There is no material guide but please double check, that material You are using is oxygen-proofFlow [lpm]
FiO2 [%]
Technical data
4th revision contains set of Valves descrbied with their FiO2 rate when powered with 10 lpm of oxygen.
Introduction
Valve uses Venturi effect to generate underpressure in a tube consisting of three parts - a convergent section (nozzle), followed by constant section (throat), ending in a gradual expansion (diffuser). Due to the oxygen flow underpressure is generated in the nozzle and air is beeing sucked into valve.
Valve is powered with a stream of pure oxygen with the flow rate 10 lpm. Two streams are mixing in diffuser: oxygen (100% O2) + air (21% O2) resulting in high flow, high oxygen stream at the outlet.
Production
Valve is designed to be printed with 3D printer vertically and horizontally to cover whole range of SLA, SLS, CJP, FDM, DLP etc. Printing devices. There is no material guide but please double check, that material You are using is oxygen-proofFlow [lpm]
FiO2 [%]
Technical data
4th revision contains set of Valves descrbied with their FiO2 rate when powered with 10 lpm of oxygen.
FiO2 [%] 40 37 34 30 28
Flow [lpm] 42 50 59 86 120