When sourcing dryer machinery, you must prioritize thermal efficiency and capacity matching. Key specs include the heat source type (Electric, Steam, Gas, or Biomass), moisture evaporation rate (kg/h), and material compatibility (e.g., rotary dryers for minerals vs. spray dryers for liquids). Ensure the equipment features PID temperature control systems for precision and high-density insulation layers to minimize energy loss. For food or chemical applications, SUS304 or SUS316L stainless steel construction is mandatory to prevent contamination.