Key Benefits

  • Reliable and consistent gravimetric feeding
  • High short and long-term dosing accuracy
  • Online calibration possible during operation
  • Simple and modular design
  • Easy to maintain

Gravimetric feeding and dosing. Accurate and easy to operate.

When it comes to precise processes like cement manufacturing, the accuracy of your feeding and dosing systems is crucial. The strength of the final product is dependent on getting the mix just right. And it’s not just product quality at stake. When dosing is not consistent, the efficiency and profitability of your process is also impacted. The PFISTER® FRW rotor weighfeeder is designed for highly accurate gravimetric feeding and dosing of fine-grained and powdered bulk materials, such as raw meal, limestone, hydrated lime, fly ash or bypass dust. The advanced weighing electronics enable truly consistent feed rates with the utmost reliability. If you combine the rotor weighfeeder with a feed bin, you also have the option of online calibration to ensure reproducible weighing data.


Your application deserves a tailor-made dosing solution

The PFISTER® FRW/SRW is typically used in kiln feeding or finish mill feed applications, for cement blending. But what do you need? We will always work with you to determine the best solution for your application. Options include:

  • Feed rates from 0 – 850 t/h;
  • Rotary valve or flow control gate; and
  • With or without pre-feeding devices.
PFISTER® FRW/SRW feeding and dosing of fine-grained materials
PFISTER® FRW/SRW feeding and dosing of fine-grained materials

High accuracy. Low maintenance. Reliably consistent.

Reliable and consistent. Two key attributes of any plant equipment, but particularly true for applications like this. You need to be able to trust your rotor weighfeeder to dose accurately in the long-term as well as over short periods. For dosing to be consistent and repeatable, whatever you are dosing. Raw meal to the kiln or off-spec cement to the finish mill, the PFISTER® FRW/SRW accurately weighs as it doses for unbeatable precision.

With the use of ProsCon® advanced weighing electronics, dosing is controlled proactively for continuous accuracy – short-term, long-term, all the time. And what’s more, by combining the PFISTER® FRW/SRW with a pre-hopper equipped with load cells, you can calibrate the system online to ensure repeatable data output.


Simple and modular design

Your operation is complex enough. You don’t need any additional complications. That’s why we design simplicity into our systems – simple maintenance, simple operation. The PFISTER® FRW/SRW have minimal moving parts to ensure optimal performance. The modular design makes for easy installation and even easier maintenance. Everything that needs to be maintained can be accessed from the outside, making it both simple and safe. And there’s no tricky cleaning to do.

How does the PFISTER® FRW/SRW rotor weighfeeder work?

The PFISTER® FRW/SRW is typically used together with a pre-hopper equipped with load cells to enable online calibration. In a standard kiln feed installation, raw meal is transported from the silo into this pre-hopper, where it is weighed. calibrated. From the pre-hopper, the material is fed to the PFISTER® DRW rotor weighfeeder via an electro-pneumatic flow control gate. The body of the rotor weighfeeder itself is suspended via two weighing bearings, which form an axis through the inlet and outlet area. A third suspension point is connected with the load cell, which measures the content gravimetrically inside the rotor before it is discharged. The speed of the rotor is controlled by the ProsCon® advanced weighing electronics, which controls the speed inverse to the load, ensuring a consistent feed rate. The straightforward design is made even simpler by the fact that it is modular, making for easy installation and maintenance.

PFISTER FRW rotorweighfeeder for kiln feeding


PDF (2731KB)

Stories from FLSmidth