Diverging Roller Graderin

Post Harvest Processing

Presentation By Optimal Lab Technologies

Sorting/Grading

Grading• Manual• Mechanical

• Process of categorizing fruits and vegetables according to quality

Qualities graded Size Mass Colour Profile

Diverging Roller Grader Working

• Fruits/Vegetables roll between diverging rollers

• Pushed forward by the roller gradient• Fall between the rollers as the slot size

increases• Location of fall determines the size of the

sorted produce• Bin/Tray is placed underneath the rollers to

collect the graded produce

Diverging Roller Grader

Applications• Pre-Grading • Grading

• Ideally Suited for Citrus and other round fruits and Vegetables

• Can be used for grading Potatoes and Onions

• Not Suitable for Long Vegetables like Carrots and Radishes

Diverging Roller Grader

Technical Specifications• Capacity: 2-3 Tons/Hr (Onions and Potatoes)• Frame Size: 1750 X 950 X 900mm• Max. No of Grades: 5• Frame Material: Low Carbon Steel• Rollers: Stainless Steel 304• Motor Type: ½ HP, Single Phase, Geared

Diverging Roller Grader Advantages

• Lower Cost Compared to other graders• Simpler Mechanisms Result in Higher Reliability• Greater Flexibility in adjusting to different grade sizes• Lower Power Consumption resulting in greater savings

in the long run• Can be operated where 3 phase supply is not available

Limitations • Cannot be used to grade longer vegetables like Carrots

and Radishes• Limited Throughput

Diverging Roller GraderWorking

Grading VideosPotato Grading

Grading VideosPotato Grading – 2

Grading VideosOnion Grading - 1

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