The difference between volumetric and gravimetric of powder feeding machine

We have been remanufacturing and delivering screw feeders for powder materials for many years now, but the usage of screw feeders varies widely from customer to customer. The primary use of screw feeders is for the metered transport of powders. Screw feeders are used in a variety of industries, such as the chemical, food processing, and pharmaceutical industries, where a constant supply of powder or granular material is required for mixing, combining, filling, or packaging processes.
We are pleased to introduce you to our screw feeder control system!
We have built a control system and manufactured a control panel in-house, and there are two types of control methods: volumetric and metering. In this article, we will discuss the capacity type in detail.
A volumetric screw feeder is used to metered feed powder or granular materials, typically used in industrial applications to transfer materials in an automated process.
This equipment typically consists of the following elements:

1. Principle of operation:
A volumetric screw feeder typically consists of a screw (a spiral rotating part) and a hood (the part into which material is fed). As the screw rotates, material is ejected from the hood following the screw’s helical shape. Depending on the rotational speed of the screw and the fluidity of the material, a fixed volume is fed at a fixed rate.
The volumetric screw feeder is suitable for feeding powdery, granular, or granular materials. They are widely used in various industries such as food processing, chemical industry, pharmaceutical, construction materials, agriculture, etc. For example, they are used in raw material mixing, smelting processes, refining operations, packaging lines, etc.
The volumetric screw feeder is controlled using screw rotation speed and feeder opening adjustment in order to feed a certain volume. The feed rate can also be varied by adjusting the feeder settings according to the nature of the material and the feed rate. Our control is also equipped with a timer, so it can be used for timed operation.

Let us explain the advantages and disadvantages of this specification in more detail.


1. constant feed rate:
The volumetric screw feeder delivers a set volume at a constant rate. This ensures consistency in the production process and improves product quality. It also improves operational efficiency because material is fed uniformly throughout the production line.

2. simple design and operation:
Capacitive screw feeders are generally simple in structure and easy to operate. Because of their simple design, they have a low incidence of breakdowns and troubles, and are easy to maintain and repair. They are also easy for operators to operate, making production line management easier. 3.

3. automation and efficiency:
The volumetric screw feeder can be integrated into automated production lines. Because they feed a constant volume at a constant rate, human error and variability are minimized. This increases overall production line efficiency and productivity.


1. Impact on material accuracy:
Although volumetric screw feeders specialize in feeding a fixed volume, accuracy can be compromised depending on the nature and flowability of the material. Particularly with powdery materials or materials of varying densities, feeding volume accuracy can be a problem.

2. lack of flexibility:
Volumetric screw feeders only work with specific settings. Therefore, they must be reconfigured or adjusted when handling different materials or feed volumes. This can be time consuming and labor intensive when dealing with production line changes and product diversification. 3.

3. Wear and maintenance:
Depending on the frequency of use and the nature of the material being fed, wear may occur on the parts of the capacitive screw feeder. In addition, periodic maintenance is required. This includes replacing parts and cleaning, which can increase production line downtime and costs.

Considering these advantages and disadvantages, capacitive screw feeders are suitable for certain applications and production environments, but other feeding methods should be considered when material accuracy and flexibility in feeding volume are required.

Thus, the volumetric type is simple to operate and easy to handle, and since it does not involve a scale, costs are reduced. Because it does not use a scale, its accuracy is inferior to that of the weighing method. We recommend this specification for situations where you want to transfer approximate quantities quantitatively.

Screw feeder