3D-Printed Oxygen Splitter Challenge

grabcad

This design is specifically tailored for FDM printing, addressing its limitations while omitting post-processing needs. Imperfections from the 3D printing process will be resolved during assembly. No support material is necessary when parts are printed upright, as shown in the attached photo. As gasket material may not be available on site, the design incorporates two built-in contact bands to restrict oxygen escape and facilitate flow towards the cannula feed line. Inlets and outlets use oxygen tubing instead of barbed fittings for ease of installation. When fully tightened, the throttle allows minimum intended flow, with each 1/5 turn CCW increasing flow by a predetermined volumetric step. To achieve optimal performance, standard operating pressure at the splitter inlet must be established and metering feature dimensions adjusted accordingly for precise flowrate steps.