distorsion/3D-printed-parametric-respiratory-one-way-valve
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@ -9,13 +9,13 @@ Here is the [printable page](https://www.printables.com/model/1114068-parametric
## 1 - Design
We call this one-way valve "_respiratory_" because it was designed to be adaptale to the low cracking-pressure requiered by breahting-related application. This is because this one-way valve was designed to integrate with our open-source 3D-printed gaz mask : [distorsion/3D-printed-parametric-gaz-mask](https://git.deuxfleurs.fr/distorsion/3D-printed-parametric-gaz-mask)
We call this one-way valve "_respiratory_" because it was designed to be adaptale to the low cracking-pressure requiered by breahting-related application. This is because this one-way valve was designed to integrate with our open-source 3D-printed gas mask : [distorsion/3D-printed-parametric-gas-mask](https://git.deuxfleurs.fr/distorsion/3D-printed-parametric-gas-mask)
In this repo we provide all the element of the valve (_as described bellow_), and the body of the valve (_either_ [3Dfiles/owv_input_body.stl](./3Dfiles/) _or_ [3Dfiles/owv_output_body.stl](./3Dfiles/) _depending on if you want a filter at the output/input or not_) that can be integrated into your project.
## 1.a - Membrane design
In the first design of one-way valve for ou gaz mask, we first used a very soft membrane made of thin silicone. In this design, the membrane is actually 3D printable, either out of "_normal_" material (_preferably PETG_) or out of flexible filament.
In the first design of one-way valve for ou gas mask, we first used a very soft membrane made of thin silicone. In this design, the membrane is actually 3D printable, either out of "_normal_" material (_preferably PETG_) or out of flexible filament.
While this requieres a larger diameter to obtain the low cracking pressure, this allows the valve to automatically close without negatiev pressure, which is needed for breathing-related application as we aren't constantly breathing in an out, and there can be a second of hang durng which a softer membrane wouldn't close and would let air go the wrong way.