Venturi Pump
thingiverse
This is a design for a Venturi pump that allows toxic gases to be pumped without flowing through the blower/diaphragm pump. The model can easily be printed with any material and requires no post-processing, other than removing the support of the vacuum inlet pipe. A full report on the part is available in my blog: http://fenneclabs.net/index.php/2019/01/22/3d-printed-venturi-pump/
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