We get a lot of good questions at the trade shows, and over the phone, about proper fan size and horsepower. With today’s larger grain bins, fan size is critical. Call us anytime to determine the proper size Sukup fan for your grain bin.
For most BIN DRYING applications, the minimum airflow is 1.0 cubic feet per minute (CFM). There are plenty of ways to meet this objective.
- In a conventional drying bin (with heat and stirring device) we commonly suggest a 24″ or 28″ axial fan. If quiet operation is important, a 1750 RPM centrifugal fan will also be fine.
- In a “natural air” drying situation (NO heater) we usually suggest one or two 1750 RPM centrifugal fans. There are also times when a 3450 RPM centrifugal or inline centrifugal would be appropriate.
- Roof vents are critical. Work with you dealer to ensure you have enough roof vents.
For most COOLING bin applications, we aim for one-third to one-half CFM. The range of fan sizes is long for these applications because the range of bin sizes is immense.
- 1750 RPM centrifugal fans are preferred for quiet long term operation.
- Axial fans are adequate unless you have a tall grain bin.
For general AERATION purposes, the objective is usually from one-seventh to one-tenth CFM. This range will vary depending on grain type, moisture, and length of storage.
- In tall commercial applications, 1750 or 3450 RPM centrifugal fans are required. We can calculate for you.
- For many farm applications, axial fans are an economical alternative. Noise concerns and size of bin are factors to consider before selecting an axial fan.
Points to remember:
- Sukup Manufacturing has the industry’s best axial and centrifugal fans. Sukup runs it’s own test facility, has the most modern motors & controls, and has excellent field support.
- Proper roof vents are critical. If you don’t have enough vents you might damage your bin roof and/or decrease fan effectiveness.
Call us, or your local Sukup bin dealer, anytime to discuss the proper fan choice for your application. When you call we’ll need to know some basic information:
- Your bin size diameter, height, etc.
- Grain type.
- Application (drying, cooling, aeration, etc.)
- Single phase/three phase service.
- Noise concerns.