A powder dosing system is an engineered solution specifically designed to overcome the unique challenges of handling powders—such as inconsistent flow, dust creation, and density variations. Using technologies like servo-driven augers and gravimetric loss-in-weight control, our systems deliver a precise, repeatable dose of your powder into your process or package.

Unlike liquids, no two powders behave the same. Their flowability can change with humidity, compaction, and particle size. Our powder dosing systems are designed for this reality. The core of most systems is the auger feeder, where a servo-controlled screw provides precise volumetric dosing. For non-free-flowing powders, an integrated agitator ensures a consistent feed to the screw. For the highest accuracy, especially when density varies, we build Loss-in-Weight systems. Here, the entire feeder is continuously weighed, and the controller adjusts the screw speed in real-time to maintain a perfect mass flow rate, ensuring your process receives the exact weight of powder required, every time.

    • Dosing Principle: Volumetric (by volume), Gravimetric (by weight)
    • Technology: Servo-driven Auger Feeders (single/twin screw), Loss-in-Weight Feeders
    • Powder Types: Free-flowing, non-free-flowing, cohesive, abrasive, fragile
    • Accuracy: Volumetric: ~ ±1-2%; Gravimetric: ~ ±0.1-0.5%
    • Features: Integrated agitation for poor-flowing powders, dust extraction ports, quick-change tooling
    • The Powder: What is it? Provide bulk density and flow properties (e.g., free-flowing, cohesive).
    • The Dose: What is the target weight or volume per dose?
    • The Accuracy: What is the required accuracy in grams or as a percentage?
    • The Application: Is it for filling a container or for feeding a continuous process?
Material option A Contact Parts: Stainless Steel 316L
Material option B Frame & Structure: Stainless Steel 304
Finish Sanitary polished, seamless welds, designed for dust containment
Dimensions Custom made design and built by your requirements
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More Information

  • FAQ -
    • Q1: Our powder is very "fluffy" and its density changes all the time. How do you dose it accurately?
    • A1: This is a classic challenge that makes volumetric dosing unreliable. The definitive solution is a gravimetric Loss-in-Weight (LIW) feeder. Since it constantly measures and controls the weight dispensed per unit of time, it automatically compensates for any and all changes in the powder's bulk density, ensuring a consistent mass flow.
    • Q2: How do you prevent dust during the dosing process?
    • A2: We use several methods. The system is designed to be as enclosed as possible. The discharge nozzle of the feeder is positioned very close to the receiving container to minimize the drop height. Additionally, a dust shroud with a connection port for a dust collector can be fitted around the nozzle to capture any fugitive dust at the source.
    • Q3: What is the difference between a single screw and a twin screw auger feeder?
    • A3: A single screw is the standard for most powders. A twin screw feeder, which has two intermeshing screws, is used for very difficult, cohesive, or poor-flowing powders that tend to bridge or "rat-hole" even with an agitator. The twin screws provide a positive, forced-flow action.
    • Q4: How does the system's hopper get refilled without stopping the process?
    • A4: The LIW feeder's controller is designed to manage this. The hopper is refilled by another device (like a vacuum conveyor). When the weight in the hopper drops to a low setpoint, the controller signals the conveyor to start refilling. During the brief refill period, the controller switches to volumetric mode (maintaining the last known screw speed) to ensure an uninterrupted flow.
    • Q5: Can one machine handle very different powders, like a fine powder and a coarse granule?
    • A5: Yes, with the right tooling. The key components that touch the powder are the auger screw and the discharge funnel. We can provide quick-change "tooling sets" with different screw geometries. One set can be optimized for fine powders and another for coarse granules, allowing the same machine to handle a wide range of materials.