This article provides a detailed overview of automatic orange sorting equipment, focusing on the roller grader. Key parameters include 380V, 1.35 kW power, 6–10 t/h capacity, and 4 sorting grades with 93–96% efficiency. It explains the working principle of feeding, inspection, and gap‑based roller grading. For applications requiring even higher precision (weight‑based, ±2g accuracy) and gentler fruit handling (minimizing bruising), the article introduces the electronic weight sorter as a premium alternative. Both product pages are linked for full specifications and custom configurations.
The orange sorting equipment produced by FstSort (First Industry) is specifically designed for size-based sorting of oranges after harvest. With a wide variety of orange types and sizes sold on the market, grading and sorting have become essential steps for orchard owners and packing houses. Manual sorting is no longer sufficient to meet today‘s demands for speed, accuracy, and consistency.
Why Upgrade from Manual to Automatic Orange Sorting?
At present, manual orange classification suffers from low efficiency, high labor intensity, and inconsistent accuracy. Workers often experience fatigue, leading to higher rates of misclassification and fruit damage. In contrast, automatic grading equipment ensures uniform results with minimal fruit handling.
Industry research shows that the overall grading efficiency of modern orange graders can reach 93–96% for citrus fruits, with conveyor belt speeds optimized to avoid mechanical damage while maintaining throughput. Compared to manual operations that typically achieve only 60–70% consistency, automated systems offer a significant upgrade in both quality control and return on investment.
How the Automatic Orange Sorter Works
The orange grading machine consists of three main components: a lifting machine (automatic feeding hopper with roller elevator), a fruit picking platform (inspection table), and a roller-type grading machine.
The process begins as oranges are loaded into the feeding hopper. The roller elevator automatically lifts and transports fruit upward, while rotating rollers ensure uniform, single‑layer feeding onto the inspection table. At the fruit picking table, workers can remove visibly defective or damaged fruits before they enter the grading section.
The core of the system is the roller grader: rollers on the grading bed move forward in parallel through a bearing‑driven mechanism. The gap between rollers gradually increases along the length of the machine. As oranges travel forward, fruits that match the current gap size fall through onto dedicated fruit conveyor belts below. This design enables accurate size‑based grading without squeezing or bruising the fruit.
For a complete technical breakdown of our roller grader, visit the Orange Grading Machine product page.
Technical Specifications at a Glance
Parameter | Value |
|---|---|
Voltage | 380V |
Power | 1.35 kW |
Capacity | 6–10 t/h |
Number of Grades | 4 |
Dimensions (mm) | 7870 × 1800 × 1230 |
Outlet Sizes | Fixed / Adjustable |
Our Fstsort orange roller grading machine is built for durability and high‑capacity performance. Food‑grade rollers ensure gentle handling, while adjustable grading intervals allow customization based on your specific orange varieties and market requirements.
For industrial‑scale operations, throughput capacities can range up to 30 metric tons per hour depending on the configuration and number of sorting lanes. Advanced models can also integrate optical sensors and cameras to sort not only by size but also by color, surface blemishes, and internal quality such as sugar content.
Need Even Higher Accuracy and Gentler Handling? Consider the Weight Sorter
While the roller grader is ideal for size‑based sorting (diameter), some packing houses and export markets require sorting by exact weight – for example, 200g, 250g, 300g oranges packed separately. In addition, although the roller grader is already gentle, some high‑value or thin‑skinned citrus varieties may benefit from even less mechanical contact.
This is where an electronic weighing sorting machine (weight sorter) comes in.
Advantages of a Weight Sorter for Oranges:
Precision weight grading – Each orange is weighed individually by high‑speed load cells. Accuracy can reach ±2g, far more precise than diameter‑based estimation. This is critical for premium export orders and supermarket contracts that charge by piece weight.
Superior gentleness – Instead of passing through narrowing roller gaps, fruit is carried on soft cups or small trays. No rolling, no squeezing, no dropping from height. Bruise rates are reduced to near zero.
Multi‑parameter sorting – Many weight sorters can integrate cameras and NIR sensors to also sort by color, size (diameter), surface defects, and even internal sugar content (Brix) in one pass.
Higher speeds – Modern weight sorters can process up to 8–10 oranges per second per lane, with multiple lanes for very high throughput.
Weight Sorter vs. Roller Grader: When to Choose Which?
Feature | Roller Grader | Weight Sorter |
|---|---|---|
Sorting principle | Diameter (gap size) | Individual fruit weight |
Typical accuracy | ±3–5 mm in diameter | ±1–2 g in weight |
Fruit handling | Rollers roll the fruit | Static or moving cups / trays |
Gentle level | Very gentle | Extremely gentle (no mechanical compression) |
Best for | Standard size‑based markets, budget‑friendly | Premium exports, weight‑based contracts, soft/thin‑skinned fruit |
Integration | Can be combined with weight sorter for dual grading | Often includes camera/color sorting as option |
💡 Recommendation: If your customers pay by weight, or if you are handling extra‑sensitive varieties (e.g., Valencia oranges for fresh consumption), upgrading to a weight sorter will maximize both product value and customer satisfaction.
👉 Explore our Electronic Weight Sorting Machine:
Orange Weight Sorter Product Page →
You can also run a roller grader + weight sorter in sequence – first remove undersized fruit with a roller grader, then sort the rest by weight. Contact our sales team for a custom line design.
Compatibility and Customization
Our sorting equipment is highly adaptable. The same machine can handle various citrus fruits including lemons, mandarins, grapefruits, and even round vegetables like tomatoes, onions, and potatoes. Sorting intervals can be quickly adjusted via mechanical or computerized controls.
We provide custom CAD drawings based on your specific factory dimensions and layout requirements. Whether you need a standalone roller grader, a weight sorter, or a fully integrated washing–waxing–grading–packing line, our modular designs ensure seamless integration and maximize your facility‘s workflow efficiency.