Compare complete configurations
Stage count describes the extrusion arrangement, not a quality grade. A supplier may distribute plasticizing, degassing and conveying duties across stages; check the actual design.
Use the same purchasing brief
Compare the same feedstock, filtration and degassing arrangement, operating space, maintenance access and quotation scope. Installed power alone does not establish saleable output.
Document trial conditions
Agree feedstock batch, trial duration, measurement point and product acceptance criteria. Discuss alternatives under comparable conditions; a second stage is not mandatory for every project.
