Continuous Loss-In-Weight Gravimetric Blender

FlowSave fulfills the extrusion sector’s demands for accurate and homogenous dosing and constant blending, by providing highly accurate loss-in-weight blending and feeding of various size and bulk density materials such as pellets, regrinds and powder.

FlowSave covers a wide production range of up to 1500 kg/h, and can feed up to 5 materials. Separate load cells for each component allow for constant monitoring of each component flow. If there are any changes in properties, e.g. bulk density, pellet size, etc., FlowSave automatically adjusts individual feeders to match the extruder rate at the required ratio – without affecting the accuracy of the blended material. This ensures a constant blending ratio according to the recipe at all times.


FlowSave is a modular system, whose feeders can be exchanged or removed as needed.

FlowSave’s design guarantees a totally homogeneous blend. The frame protects the dosing stations from the extruder’s movements and vibration.


FlowSave’s high resolution weighing system allows precise low-rate additive feeding. Material flow is continuously monitored, while the controller automatically regulates the rotation speed of the dosing screws; ensuring a precise and homogenous blend of materials.


Achieve maximum savings with FlowSave.

Your final product will show a considerably lower fluctuation range, minimizing the usage of costly materials and reducing waste and start-up scrap. You can lower the additive percentage during operation, which also represents a significant saving.

FlowSave Advantages:

  • Compact design and low space requirements
  • High precision
  • Optimal homogeneous mixing of the dosed materials
  • High dosing repeatability
  • Easy and quick cleaning when changing recipe
  • Various size and bulk density materials

Gram/meter monitoring

Using a shaft encoder, FlowSave can monitor the throughput in term of gram/meter. By continuously measuring the material flow (kg/h) by means of a loss-in-weight method, and by monitoring the product speed (m/sec), FlowSave translates the throughput to terms of gram/meter.
The gram/meter monitoring allows easy monitoring for the operator.

Extruder Control

FlowSave’s controller can supply a continuous control signal to the extruder’s controller, which controls the extruder rpm to ensure the required pre-set throughput. FlowSave changes the extruder’s speed to meet the desired throughput, and simultaneously adjusts the screw speed of each component to ensure a constant ratio of the material at all times.

FlowSave Features:

  • Multiple recipes
  • Designed for extrusion rates up to 1,500 kg/hr
  • Flexible configuration permits the installation of up to 5 dosing stations
  • Changeable dosing screws for different throughput ranges (from 0.02 up to 250 kg/h) for each material
  • Works perfectly with either flood feed or starve feed extruders


Need a little extra to get the job done? Check out our accessories. Find one that makes your project that much easier.

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