Filling from Silo

Filling bulk bags directly from silos is a highly efficient and controlled method commonly used in industries such as food, chemical, and construction. Silos provide a centralized storage solution for bulk solids, enabling automated, dust-controlled filling operations ideal for high-volume packaging and logistics.


Process Overview

  • Material Delivery from Silo:
    Material flows from the silo through a controlled outlet, often using gravity feed or assisted by screw conveyors or pneumatic systems to regulate the flow rate.
  • Filling Station Setup:
    The bulk bag is positioned under the silo outlet on a frame equipped with weighing systems and dust control units. The inlet spout of the big bag is securely connected to the silo discharge to prevent spillage and dust release.
  • Controlled Filling:
    Flow rate is regulated using valves, rotary feeders, or screw conveyors, ensuring consistent and accurate filling. Weight sensors monitor the filling process, allowing automatic shut-off when the desired bag weight is reached.
  • Dust Containment:
    The filling interface includes dust-tight connections, flexible sleeves, and local dust extraction units. This setup prevents dust emissions during filling, maintaining a clean working environment and compliance with hygiene and safety standards.
  • Bag Sealing & Handling:
    After filling, the bulk bag is sealed and moved for storage or shipping using forklifts or automated palletizing systems.

Key Components
  • Silo with Controlled Discharge:
    Equipped with flow regulator equipment such as rotary valves, slide gates, or screw feeders to control the conveying of material.
  • Bulk Bag Frame with Weighing System:
    Holds the big bag securely during filling while continuously monitoring weight to ensure accurate dosing.
  • Dust-Tight Filling Interface:
    Flexible sleeves or spout adapters connect the bag inlet to the silo outlet, preventing unwanted dust emissions.
  • Dust Extraction System:
    Filters and vacuum units capture any airborne dust generated during the filling process.
  • Automated Controls:
    Programmable logic controllers (PLCs) monitor flow rates, weigh control, and system safety interlocks.
Advantages of Filling from Silo
  • High Accuracy:
    Flow controls and integrated weight sensors maintain consistent and repeatable filling accuracy, reducing product loss and maintaining consistent production quality.
  • Enhanced Cleanliness:
    Dust-tight interfaces and extraction systems maintain hygiene standards—critical for food and chemical products.
  • Automation Friendly:
    Integration with silo management and control systems allows fully automated filling cycles, reducing labor costs and human error.
  • Space Efficiency:
    Using silos for storage and feeding reduces the need for intermediate handling and minimizes floor space usage.
  • Versatile Capacity:
    Suitable for various fill rates and bag sizes, designed for flexibility in low-volume and mass production.
  • Improved Safety:
    Containment of dust reduces health risks and complies with workplace safety regulations.
Industry Applications
  • Food Sector:
    Silos storing flour, sugar, or starch feed directly into hygienic filling stations designed to maintain product integrity and prevent contamination.
  • Chemical Sector:
    Powders like calcium carbonate or resins stored in silos are filled into bulk bags with tight dust control measures to ensure operator safety and environmental compliance.
  • Construction Sector:
    Cement, lime, and similar materials stored in silos are accurately filled into bags for easy transport and on-site use.