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3D CAD File: Respirator-free reanimation Venturi's valve


You may have read my recent article explaining how Italian company Isinnova responded to a call for help from a hospital in Northern Italy to keep their reanimation devices operational during the Covid-19 pandemic by 3D printing replacement valves that had become unavailable from their usual suppliers.

Below we have included a link to download the 3D CAD files for these valves, to ensure that everybody who needs access to them can print their own. 

These ready-to-print Venturi's valve models are for respirator-free masks and have been created as a non-profit project for the Covid-19 pandemic.

Revision 2 (CFD-calculated) available:
* FiO2 = ~33%
* O2 sup. = 10LPM
* Air out. = ~63LPM

2x 25mm O.D. (air suction, patient)
1x 5mm O.D. (oxygen)

Volume of 3D model - 15133 mm3

Revision 1 contains 3 Venturi Valves with:
B = 0,12 ; 0,3 ; 0,5

Uploaded: 19/3/2020
Files Included: STL, STEP / IGES, Rendering, SOLIDWORKS


For anybody who needs access to a free 3D design software in order to access these files DesignSpark Mechanical is free to download and use for both personal and commercial use. 



3d-printed-valve-1_595dbb6b03fba008ba7cd56dd9d4fc251dc354ba.jpgThe original valve (left) and the 3D printed replacement (right) 

Editors Note: Please note that this may not be an open-source design, and the use of it may be subject to a copyright owner’s rights.  We are publishing for use only for social purposes in the face of the current pandemic: it should not be used in a profit-generating fashion. RS cannot be held responsible for any claims arising from your use of this design.

I am a 32-year-old tech lover, self-confessed geek and football fanatic! When I am not playing with the latest gadget you will often find me watching my favourite TV shows including Game of Thrones, Young Sheldon and The Big Bang Theory. Feel free to follow me on Instagram @robbiedunion or Twitter @robbiedunion


July 27, 2020 10:23

Thanks a lot from Senegal
Best regards

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March 25, 2020 08:28

share through LastBasic profile! we are doing the same here in Spain, do you know if is the same initiative? the same design?

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March 23, 2020 13:54

I can only find the 0.33 FIO2 model. The other 2 files are missing. Can you help?

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March 23, 2020 13:54

I can find only one model for 0.33 FIO2. The other two files are missing. Can you help?

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March 20, 2020 14:45

I cannot download the CAD files...

March 20, 2020 15:03

@Fernando5 hi sorry the link has now been updated, they're available from

March 20, 2020 15:04

How is this project being coordinated? What materials and other settings are appropriate? How many of these parts are needed?
information about related projects and a discord server where the stuff is being discussed can be found in this article:
Thank you for posting this!

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