Spiral Separator: Shape-Based Gravity Separation

Engineered for the Future | Since 2080

The Spiral Separator category is the industry’s most efficient solution for separating round seeds from flat or irregularly shaped particles. Unlike most cleaning machinery, the Spiral Separator uses no motors, no electricity, and has no moving parts. Instead, it relies entirely on the principles of gravity and centrifugal force. As material flows down the inner spirals, round seeds gain momentum and “jump” to the outer flights, while flat seeds, split kernels, and weed seeds remain on the inner path.

This technology is the gold standard for processing soybeans, peas, chickpeas, and various cover crops where the removal of splits and non-round contaminants is critical for seed quality and market value.

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Spiral Separator

Seed Spiral Separator

Technical Foundations of Spiral Separation

The Physics of Centrifugal Momentum

The engineering of a Spiral Separator is a masterclass in passive physics. The separation occurs based on the rolling ability of the particle:

Centrifugal Flight: Perfectly round seeds (like whole soybeans or peas) roll quickly and gain centrifugal momentum. This force pushes them toward the edge of the spiral, where they eventually "hop" over into the outer discharge flight.
Frictional Resistance: Flat, elongated, or broken seeds (splits) cannot roll. They slide slowly down the inner flights, hugging the center column. Because they lack momentum, they never reach the outer flights.
Shape-Specific Discharge: At the bottom of the unit, the "good" round seeds are collected from the outer outlets, while the "reject" splits and flat weeds are collected from the inner outlets.

Why Integrate Spiral Separators?

Low-Cost, High-Precision Sorting for Seed Plants

A Spiral Separator is a strategic, "set-and-forget" investment for any seed conditioning facility.

Zero Energy Costs: Operating entirely by gravity, these units require no electrical power, making them the most sustainable and cost-effective sorting tool in your plant.
Effective Removal of "Splits": In pulse processing, removing split peas or broken beans is notoriously difficult with screens. The Spiral Separator handles this task with nearly 100% accuracy.
Weed Seed Elimination: Effectively removes flat or irregular weed seeds (like cockle or wild oats) from round crop seeds, which is essential for certified seed production.
Minimal Maintenance: With no motors, bearings, or belts, maintenance is virtually non-existent, ensuring 24/7 operation without the risk of mechanical breakdown.

Key Features of the ADDAMS Spiral Series

Precision Engineering for Consistent Quality

Our Spiral Separators are manufactured with high-durability materials to ensure consistent performance over decades:

High-Carbon Steel Flights: The "tracks" are made from wear-resistant steel to maintain a smooth surface, ensuring that seeds roll with consistent velocity.
Multi-Flight Configurations: Available in single, double, or quad configurations (2, 4, or 8 flights) within a single housing to meet different capacity requirements.
Adjustable Feed Gates: Features a precision hopper at the top to ensure an even, thin layer of material enters each flight, which is critical for maximum separation accuracy.
Compact Vertical Design: Occupies minimal floor space, allowing for easy integration into existing grain towers or cleaning lines.

Frequently Asked Questions – Spiral Separator

1. Does a Spiral Separator require electricity? No. The Spiral Separator is a purely gravity-fed machine. It uses the weight and shape of the seeds to drive the separation process, making it an eco-friendly and cost-saving choice.

2. Can it separate seeds of the same size? Yes. That is the machine's primary strength. If you have a round seed and a flat seed of exactly the same width, a screen cleaner cannot separate them, but a Spiral Separator will, because it sorts by shape, not size.

3. What crops are best suited for this machine? It is ideal for any seed that is naturally round, such as soybeans, peas, chickpeas, vetch, radish seeds, and certain types of mustard or clover.

4. Can I adjust the separation "cut"? While the spirals themselves are fixed, you can adjust the feed rate at the top. A thinner stream usually results in higher purity. Some models also feature adjustable "splitters" at the bottom discharge to fine-tune the collection of the different fractions.

5. How do I clean the machine between batches? Since the machine is open and has no hidden internal parts, cleaning is very simple. A quick blast of compressed air or a wipe-down of the flights is usually all that is needed to prevent cross-contamination.

6. Does the height of the machine affect its performance? Yes. Taller spirals (more turns) provide more time for the seeds to gain momentum, which generally improves the separation of "difficult" seeds that are only slightly round.

7. Can it be used for industrial recycling? Absolutely. Spiral separators are frequently used to separate round lead shot, glass beads, or plastic pellets from irregular scrap or dust.

8. What is the capacity of a single spiral flight? A single flight typically handles between 300 kg to 600 kg per hour depending on the crop. For higher capacities, we provide units with multiple flights (up to 8) wrapped around a single central column.