Eductor assembly with dual-material eductor body

An eductor assembly comprising:

• a single piece metallic insert having a tubular body with a circular cross-section defined between an inlet end and an outlet end, the tubular body including a wall opening defined between the inlet end and the outlet end;
• and
• an inert polymer molded over the single piece metallic insert so as to simultaneously define both a motive fluid stream within the metallic insert and an eductor body external to the wall opening, the eductor body having a molded injector inlet formed integrally with and in fluid communication with the motive fluid stream, the motive fluid stream including a motive fluid inlet, a venturi throat, a mixing zone and a mixed fluid outlet, the motive fluid stream shaped to optimize venturi efficiency such that the motive fluid stream has a different internal geometry than the single piece metallic insert, the inert polymer forming a wetted portion of the eductor assembly, wherein a non-wetted portion of the single piece metallic insert is exposed at the inlet end and the outlet end so as to provide the inlet and outlet ends with a metallic connecting surface;
• an injector assembly mounted to the eductor body and fluidly connected to the injector inlet;
• and
• a spray nozzle positioned within the inlet end.