Oxygen Mask to respirator conversion

thingiverse

Convert a simple oxygen mask into a filtered respirator. Using a tourniquet rubber band to create the seals for the valves. For the vent valve use a 24mm tourniquet cut to 63mm, fold and insert into the vent pushing it with a thin device. For the nose valve, place a smaller piece of the same rubber and cut to profile secure to flap with the small clip. I recommend fixing the blank plug and the vent with a small amount of silicone to ensure a seal in the joints. The grill should fit properly on the filter but you can sand it lightly for a better fit if it is to tight. For filter material this was designed to fit 2 CPAP filters, other filter material can be cut to size using the filter as a guide. I included the separate STLs and another STL with the full kit. Also included the FreeCad file if you wish to alter or tune the design. Please print an make available for first responders that are in dire need for PPE equipment.