GS Grain Separator


These Grain Separators are popular all over the world and are being used by over 10,000 satisfied customers since 2008 on five different continents.

GS Grain Separator

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Gentle Grain Cleaning And Grading

These grain separating machines will clean and grade all types of crops or bulk material. A stable air flow maintains consistent cleaning action throughout the process. The use of air with rubber coated cleaning chambers keeps kernel damage to a minimum. These machines will separate both the light and heavy impurities as well as grade the thin, light inferior seeds from the plump, high quality seeds all in one single pass. This is important because planting the most viable seeds will improve yields up to 30% and helps the crop mature earlier and more uniformly. Selling high quality seed for a premium price which would otherwise be sold for commodity price can add value to a crop. Many farmers not only save money but make additional income when they use a grain separator. These machines bring great value to almost any one growing or handling grain.

User Friendly Operation

Learning to operate these machines is easy and intuitive. Using a little common sense and watching the details enables almost anyone to learn the operation of these machines in just a few minutes. Once the control of the machine is learned, it can be operated by almost anyone without special training. The Variable Frequency Drive (VFD) makes switching between crops and fine tuning separating parameters both quick and easy. This feature provides the operator complete control over how the separations are defined. This single advantage makes the Metra Grain Separator stand out from all other similar machines. It enables soft starts and stops.

Separates By Density With Airflow

The heaviest impurities, such as stones, dirt, and other trash particles fall through the first output.

  • Seeds with the highest density fall through the 2nd and the 3rd outputs. Grain exiting these fractions are the best choice for planting with the highest quality having the highest germination rate.

  • The medium density seeds fall through the 4th and 5th outputs. Grain exiting these fractions are good for food or commodity grain.

  • The lowest density seeds and damaged kernels fall through the 6th and 7th outputs. The grain from these fractions are best used for feed. Grain collected from the 4th, 5th, and 6th outputs are sometimes cleaned again to optimize value from the crop.

  • The dust, chaff and the other light impurities are blown out of the separating chamber.

Solution For Removing Disease From Grain

Aflatoxin, ergot, fusarium, vomitoxin and other diseases can be reduced significantly to acceptable levels. This process turns a worthless crop into a valuable commodity.

No Screens, Maintenance Free

The motor which runs the fan is the only moving part on the machine. There are no screens since the machine uses just air to affect the separations. There are no lubrication points and no spare parts are needed.

Low Power Consumption

The GS Grain Separators are champions in electrical energy economy. They have the lowest power consumption per ton of grain cleaned among all similar machines on the market.

Reduced Dust Environment

A cyclone (CY) is designed to be used with the GS Grain Separator inside a building. Air movement within the separator occurs in a circle. This option significantly reduces the amount of dust and chaff. 

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Award Winning Performance

Increase Yield, Add Profit

Cleaning wheat for seed with an GS Grain Separator

will sort out the highest quality seed with the heaviest test weight. This results in the following benefits:

   • Germination is uniform and is viable up to 96%

   • Uniform crop maturity up to a week earlier
   • Healthier crop with better disease resistance
   • Yields increase up to 30% or better

Increase Efficiency In Production

Cleaning wheat for seed with just a gravity table may still leave 10% of splits, light or damaged kernels in the seed which will not germinate. That translates to 100 acres wasted for every 1,000 acres planted or 1,000 bushels of trash seed for every 10,000 bushels of viable seed. It is a waste of money, labor, and other resources to treat seeds, fertilize and farm 10% of your acres unless these non-viable seeds are removed.

Cleaning foreign matter out of a crop will reduce dockage. Grading a grain crop and selling the best quality seed will bring a premium price. Removing disease from a crop will add value to the crop. For example:

       A wheat crop with 7 ppm vomitoxin = $3.25/bu

       10,000 bu X 3.25 = $32,500


When cleaning a 10,000 bushel wheat crop with an ISM Grain Separator would yield 9,000 to 9,500 bushels of good clean grain with 5% to 10% exhaust material.

       A wheat crop with <2 ppm vomitoxin = $6.50/bu

       9,000 bu X 6.50 = $58,500


The value added to the 10,000 bushel wheat crop is $26,000. Return On Investment is short and can sometimes be reached after only a few hours of use!

Rental rates available for the GS Grain Separators.

ISM Difference