COVID-19 PEEP one way adjustable valve 3D printable : this one way valve hepls keep Positive end-expiratory pressure in lungs for patient under assisted breathing, in case of lack of medicaly aproved PEEP valves can easily 3D printed without support , composed of 2 mandatory parts an one optional part (stl and step files ).

you will need a spring (i used the one under the bed of a 3d printer) and an M3 screw to adjust the presure, assembly is straight forward see images.

• the top part to be printed with the little holes on a glass bed (needs to be extra smooth) no supports no raft no brim
• the middle part on a glass bed (needs to be extra smooth also) no supports no raft no brim, the M3 screw needs to move freely inside the center hole
• the buttom part is optionalwhen assembling the top and middle parts make sure the smooth surfaces face each other to make a seal