SEED GRADER/CLEANER

A Seed Cleaner & Grader is a precision agro-processing machine designed to clean and grade seeds or grains based on differences in aerodynamic properties (weight-to-surface ratio) and physical dimensions (length, width, thickness). This equipment plays a critical role in seed processing plants, agricultural commodity trading, and primary value addition at farmgate level. It ensures that seed lots are free from dust, husk, shriveled seeds, broken grains, inert matter, and other foreign material, while also grading them into uniform size fractions—typically small, medium, and large—for packaging, planting, or further processing.

What It Does

The machine uses a two-stage process:

Air Aspiration: Separates lightweight chaff, dust, and immature/shriveled seeds by drawing them out through adjustable airflow or suction fans. This is critical for initial bulk cleaning.
Grading by Screens: Vibrating sieve decks fitted with interchangeable perforated screens grade seeds based on size. Heavier/larger seeds pass through sequential screen decks to collect different fractions.

Typical Uses

Seed Cleaning & Grading: Wheat, paddy, maize, soybean, pulses, sunflower, castor, mustard, sesame, cumin, coriander.
Grain Preparation for Storage or Sale
Pre-cleaning for Oilseeds (before solvent extraction or expeller)
Nursery & Certified Seed Processing
Spice and Herbal Crop Cleaning

Business Opportunities

Rural Agri Infrastructure

Ideal for FPOs, agri startups, or agri-tech hubs in villages—serving hundreds of farmers during harvest.

Commercial Seed Processing Units

Used before treating, coating, and packaging seed for certified seed companies.

Bulk Buyers / Traders

Cleaning grain before warehousing, exporting, or supplying to mills enhances grade and fetches premium rates.

Herbal & Spice Sector

For cleaning and grading dry roots, pods, and herbal parts like fenugreek, tulsi, kalonji, etc.

Advantages

Feature	Benefit
Single Machine – Multiple Functions	Cleaning + Grading in one pass
Flexible Configuration	Easily changeable screens allow multi-crop use
High Efficiency	Removes up to 98% foreign matter and splits seeds into 2–4 grades
Low Power Consumption	Typically 1–3 HP motors; low operational cost
User-Friendly	Easy to operate and maintain with minimal training

Limitations

Challenge	Description
Not for Moist Material	Requires dry seeds to function optimally
Manual Cleaning of Screens	Frequent maintenance needed to avoid clogging
Throughput Limitation	Large-scale plants may require multiple units or automated lines
Inconsistent Airflow Can Affect Performance	Requires skilled setup or trained operator

Technical Highlights

Parameter	Range
Capacity	0.5 – 5 TPH (varies by crop & model)
Air Cleaning System	Centrifugal fan or aspiration duct
Decks	2–3 vibrating screen layers
Grading Range	Typically 3 fractions (small, medium, large)
Power Requirement	1.5–5 HP, depending on size

Associated Products / Systems

Seed Treater (Slurry or Film Coating)
Bagging or Bulk Packaging Systems
Bucket Elevators
Dust Collector / Cyclone Separators
Magnetic Separators or Destoners (for heavy impurities)

Strategic Viewpoint

Seed cleaner-graders are low-CAPEX, high-utility assets that empower small and medium agri-entrepreneurs, cooperatives, and exporters to add first-level value at source. With rising emphasis on traceable, certified, and quality-assured planting material, the demand for clean, uniform seed lots is non-negotiable. This machine fits perfectly into both standalone rural operations and integrated seed processing lines.