The file 'Universal Exhalation Valve For Masks 3D Printer Model' is (stl) file type, size is 1.5MB.
Just open a 24mm hole in the mask and screw the valve.
To facilitate printing, just glue the two pieces (see image)
Also print the mold to cut a rubber for flapper disk
is a remix of: https://www.thingiverse.com/thing:4223974
Mask with this adapted valve: https://www.thingiverse.com/thing:4268800
Update: Now with directed air outlet
valvola-1.1.stl | 970.1KB | |
valvola-2.stl | 770.1KB | |
valvola-direcional.stl | 815.3KB | |
valvola-molde.stl | 26.1KB | |
valvola-porca.stl | 345.8KB | |
valvola-rosca.stl | 1.0MB |