Grain Systems Inc - GSI Group

Model StirAtor - In-Bin Dryers


For over 30 years, the Design III Stir-Ator has been the most dependable stirator system. Though among the lowest in capacity, the Design III can turn a grain bin into a drying system at a minimum investment. A high temperature, above 10 degree rise, bin dryer has to have a way to dry all the grain to the same moisture. Just running a fan & heater on a bin full of grain will result in 5% grain at the bottom with no moisture removed on the top. GSI’s Stir-Ator ensures that all the grain is the same moisture, with no wet tank required; all you need is a fan & heater and an auger to fill the bin.

GSI puts safety first. Our Design III Stir-Ator Bin Dryer is protected by a fused disconnect box, with all motors protected by fuses. In the event the augers bind up, an automatic shut off is provided.


Unlike other stirators, the Design III Stir-Ator has a unique drive that changes the path of the augers every revolution around the bin. The pattern puts the augers in the outer 1/3 of the bin where 50% of the grain is more than in the center so all the grain gets uniformly stirred. On every Design III you can lock the augers in the outside position at the end of the year to thoroughly stir and cool the grain at the bin wall to minimize issues during the storage period.

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