Safe 3d printable oxygen splitter

grabcad

The main aim of this design is to prevent relying on 3D printed component's airtightness and avoid exposing ABS to pure oxygen, which isn't suitable for such an environment. To achieve this, if a part must be 'gas wetted', it should be minimal in size and sealable using acetone/varnish/glue. This device needs to be used with a T or Y fitting, preferably an off-the-shelf safe component; however, a 3D printed one is also acceptable. Sean Buxton's design (Custom Bleed Valve and Flow Splitter) and Anton Alveflo's are suitable alternatives. The design avoids common issues in many submitted designs like difficulty in 3D printing support removal from inside the parts, lack of independent flow adjustability, and misleading users about flow rates. It also focuses on ergonomics with features such as finger grip, detents between settings, and a clear flow indicator. Lastly, this design has gone through numerous iterations for improvement but hasn't been tested in the field yet.