Feeding Solutions
What is a gravimertric feeder?
Gravimetric feeders integrate a volumetric feeding device into an advanced system that operates by measuring the mass of the material being fed. A weighing system, such as a weigh scale or a configuration of load cells, is used to measure the weight of the hopper, feeder, and material. This information is then transmitted to a controller, which can accurately determine the quantity of material being fed. The feeder can be adjusted to a desired feed-rate, and the control system will automatically adjust the speed to maintain a consistent rate, even when there are variations in the material being fed. If the rate deviates significantly from the target, alarms can be triggered and the process can be halted in a controlled manner if needed, allowing for the issue to be resolved.
Hence, the performance difference between gravimetric and volumetric feeders is demonstrated by the addition of a weighing system that regulates the rate of materials injected into the process.
- Gravimetric feeders precisely measure and regulate the rate at which material is injected into the process.
- Gravimetric feeders have a closed loop control system that allows it to precisely alter the feeder's speed in order to achieve the required rate of material injection.
- Accuracy May be better than 1% depending on the material and installation environment situations.
Gravimetric feeders fall into two broad categories:
Loss-in-weight (LIW) and Gain-in-weight (GIW), depending on how the weight is determined and where the load cells are located.
Depending on the needs of the client, the Behpoo company has been able to design and produce GIW and LIW systems with native design and high accuracy.
Gain-in-weight (GIW)
Gravimetric feeders in the GIW system deliver multiple materials to a hopper in a sequential manner,
and load cells weigh the corresponding hopper.
Loss-in-weight (LIW)
Using the LIW, multiple materials are simultaneously transferred to a hopper by gravity feeders. Each feeder has load cells to weigh the matching material, and because the material is weighed and injected at the same time, the speed is higher than with the GIW method.
Areas of Application
. Chemical and petrochemical processing::Gravimetric screw feeders measure powders, granules,
and flakes precisely, guaranteeing proper recipe formulation—particularly prior to the mixing and
extrusion processes, which combine different powders and granules.
. Food Production::By regulating the feeding of materials, these feeders help manufacturers of food
products maintain a constant level of product quality.
.
Plastics Manufacturing:: To maximize production efficiency, gravimetric screw feeders precisely
administer plastic pellets and regrind.
. Pharmaceutical Manufacturing:Gravimetric feeders adhere to stringent guidelines and offer
precise dosage for essential procedures in the pharmaceutical industry.
With high accuracy of ±1% to 2%, gravimetric feeders consistently weigh the material and modify the
screw speed to provide weight-based feeding.