Thousands of years ago, humans learned to cultivate the first crops—grains—for their benefit. Even today, grain harvests save humanity from hunger and allow various forms of agriculture to thrive. However, the quality and safety of grain largely depend on proper processing, sorting, and storage. Modern grain cleaners are an excellent aid in this. Metra offers modern solutions for grain cleaning.

Aerodynamic machines of this type are developed and manufactured by many producers. But which option should you choose? And does this equipment truly meet the needs of today’s farmers? Let’s break it down step by step.

How Do Aerodynamic Grain Cleaners Work?

Aerodynamic grain cleaners use upward airflows to process the grain. These air currents move through the falling seeds, lifting light impurities into the air extraction system. If you choose the right aerodynamic grain cleaner, it will allow airflow power adjustment based on the type of grain being processed and its specific characteristics, such as contamination level. This ensures maximum cleaning efficiency.

Functional Features

This equipment stands out for its unique multifunctionality. It’s not just a fan with interchangeable screens for different grains. These machines adapt to various grain types, sorting them by volume, weight, and buoyancy. Depending on the task, users can adjust the fraction capture to block impurities.

They are designed for different cleaning stages, including initial, pre-cleaning, and secondary cleaning. They can also select seeds for planting. Essentially, one aerodynamic grain cleaner can replace several machines used for winnowing and seed calibration.

These separators can handle high-moisture and heavily contaminated grain, effectively removing:

• Seeds damaged by insects or during harvest;

• Undersized, underdeveloped, diseased, or sprouted grains;

• Weed seeds, including harmful ones like poisonous cockle;

• Mineral inclusions, such as stones, clumps of soil, or sand.

Design and Operation

Aerodynamic grain cleaners typically feature a light fraction catcher, an air-cleaning complex, and a flat-screen scalper. Models equipped with cyclone dust collectors, like those in Metra’s catalog, ensure the highest cleaning level. These separators use centrifugal force to direct impurities into a separate chamber.

In these systems:

• Denser seeds fall downward, while lighter seeds stay at the top of the air stream.

• Soft internal linings and carefully calibrated settings prevent grain damage, preserving over 98% germination.

• Grain is categorized into planting material, flour-grade products, feed grain, and waste.

Key Benefits Farmers Love

Aerodynamic grain cleaners from Metra are highly recommended for their outstanding features:

1. Higher Yield Potential: Boost germination rates and productivity by nearly 40%. Replace 3–4 different machines with one versatile cleaner.

2. Universal Application: Handle grains of all sizes, from sunflower and wheat to poppy seeds and hemp, preserving grain integrity.

3. Energy Efficiency: Low-power motors consume only 0.75–22.0 kWh per hour. These machines start and stop smoothly, even under unstable voltage.

4. Quick Payback: Although the initial cost is high, Metra cleaners can pay for themselves in a single season. They’re also 25% cheaper than most competitors.

5. Disease Prevention: During sorting, the separator removes seeds affected by fungal diseases, protecting crops from infections.

6. Fast Transitions: Switch between different seed types in minutes. Maintenance is minimal, and processing 8,000 bushels requires just 30 HP of power.

Metra aerodynamic grain cleaners, available with a 3-year warranty. They offer unrivaled efficiency and reliability. By investing in this equipment, you will significantly improve your farming operations with cleaner, healthier grain and increased profitability.