spiral pasteurization coil 3d model

A highly detailed A3 industrial design sketch of a compact spiral pasteurization tube system for ice cream, designed to fit inside a small food truck. The system consists of multiple stainless steel tubes arranged in tight vertical spiral/serpentine loops stacked under each other to save space. Include a mini heating unit (electric heater or compact steam source) connected to the lower section of the tubes, with temperature sensors and control valves. Show a small integrated cooling unit (chilled water loop or mini compressor) connected to the upper section for rapid cooling. Add a small motor-driven pump to circulate the mix through the tubes. Emphasize compact dimensions (space-efficient layout suitable for food truck interior), food-grade stainless steel material, insulation layers around tubes, and clear flow direction arrows. Clean, realistic, functional engineering style with precise connections and minimal footprint.