+44 (0)1282 777 566

Gravimetric or Volumetric screw feeder?

Making the right choice

In today’s economy, as energy costs rise and the cost of manufacturing increases, it is becoming more of a challenge to stay competitive in regional and global environments.

Manufacturers are continually looking for ways to improve their processes and boost their competitiveness. Therefore, the right screw feeder is essential right from the beginning. Using the right metering feeder can enhance your system performance and improve efficiency. For accurate precision and control, it is typical to use a Gravimetric feeder, also known as a loss in weight feeder. This makes it easier for more precise weighing and accuracy.

With Gravimetric feeders, there is also the added benefit of having a rotating dispensing cylinder with high accuracy, even at rates as low as 0.02gm/sec. This eliminates “pulsing”, which can cause the amount of material dispensed to vary as much as +20% of setpoint.

One of the most common issues in a screw feeder system and one that can easily enhance and improve efficiency is to keep material flowing into the process. Choosing a Volumetric feeder option may seem like the most cost-effective option. Yet, it is vital to consider the configuration options available for a gravimetric system as Gravimetric screw feeders can be ordered in special high-temperature configurations so that they can handle dried materials (like PET) at a high temperature.

The Gravimetric feeder is already designed with the loss-in-weight metering technology to improve accuracy while making the units simple to operate. Unlike Volumetric feeders, Trantec Gravimetric feeders are self-calibrating, thus adjusting automatically for changes in material type. As a result, this screw feeder is easier to set up and allows excellent processing up-time for increased productivity.

If the choice between a Volumetric or a Gravimetric feeder is still in the balance, then Trantec engineers can assist in giving the best possible advice in selecting the most suitable alternative.

For more information on Trantec’s range of screw feeder machines, please call 01282 777566.


Trantec Solids Handling Ltd

Four Lane Ends Rd



Ol13 0TB

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Telephone: +44 (0)1282777 566

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