Hopper Bottom Silo | Bidragon Steel Silos
A hopper bottom silo from Bidragon, also called a cone bottom silo or cone bottom storage silo, is a silo with a conical bottom. The product documentation states that most material storage requires a hopper, that small steel cones can be fixed to the side wall, and that for large-diameter industrial silos the cone is supported by the silo bottom floor slab to reduce risk. Cones are designed specifically to the customer's requirements and the material situation, and food and grain applications must eliminate hazards and safety risks.
The documented configuration includes complete emptying, a 45-degree cone bottom for granular products in general and a 60-degree cone bottom for poorly flowing powders, a design standard statement (D-4097 or ASTM D-3299, presented as a design standard, not as a company certification), and a standard configuration of carbon steel pipe leg supports with primer coating and a standard clearance of 18 inches from the silo bottom to the bottom plate.
Key features
- Conical bottom, designed to the customer's requirements and material situation
- 45-degree cone for granular products; 60-degree cone for poorly flowing powders
- Complete emptying (product documentation)
- Standard 18-inch clearance from silo bottom to bottom plate
Specifications
| Item | Specification |
|---|---|
| Cone angle | 45° for granular products; 60° for poorly flowing powders (product page) |
| Supports | Carbon steel pipe legs with primer coating (standard configuration) |
| Clearance | 18 inches, silo bottom to bottom plate (standard configuration) |
| Design standard stated | D-4097 or ASTM D-3299 (design standard statement, not a company certification) |
Values in this table come from the product documentation for this product only. Where a value is not listed, it is marked as to be confirmed in inquiry, and it must not be taken from another product on this site.
Applications
Hopper bottom silos serve sites where complete emptying and controlled discharge matter, including grain, food and powder handling. The cone angle is chosen by material flow behaviour, which is why the inquiry should state the material and its flow characteristics.
How this product fits in a storage line
Storage silos are normally planned around the foundation, the discharge method and the handling line. A flat bottom needs full support from a prepared ground surface, a hopper bottom is chosen where complete emptying matters, and an elevated arrangement is chosen where gravity discharge height matters. A buyer comparing storage silos should therefore settle the foundation plan, the discharge arrangement and the connection to conveyors or packing equipment at the same time as the silo size, because those decisions affect each other.
What to confirm in your inquiry
Because silo requirements depend on the material, the site and the handling system, the following items are confirmed per project before any quotation is issued. Sending these details with your inquiry helps the supplier respond with a workable proposal rather than a generic price.
- Material to be stored, including bulk density, moisture content and flow behaviour, and whether the material is free-flowing or prone to bridging.
- Required storage capacity and any future expansion allowance, together with the available footprint and height limit at the site.
- Discharge method and downstream equipment, such as a screw conveyor, a pneumatic conveying line or a packing machine.
- Roof and bottom configuration, including whether a flat bottom, hopper bottom or elevated arrangement suits the discharge and foundation plan.
- Ventilation, level measurement, temperature monitoring and dust control requirements, where the stored material or local rules call for them.
- Surface protection and coating requirements, the installation method available at the site, and the delivery scope expected from the supplier.
- Any applicable design standard or local code that the project must follow, so that the proposal can be checked against it.
Where a value is not listed on this page, it is not a standard figure for this product. It is a project-specific figure to be confirmed in writing during the inquiry process, and it should not be assumed from another product on this site.
Related products
Request a quotation for this product. Specifications that are not listed on this page, including capacity, dimensions and delivery scope, are confirmed per project through the inquiry form. Send an inquiry →