Multipurpose gravimetric blender station

Feeding a wide variety of bulk materials

The K4G gravimetric blender station can easily be adapted for the required application
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The K4G gravimetric blender station can easily be adapted for the required application, for example volumetric or gravimetric, continuous or discontinuous operation, without mechanical changes. Moreover, this blender station is able to feed a wide range of bulk materials with a variety of bulk density and flow characteristics into a reactor, mixer, compounder, extruder or mill using a screw feeder or bulk solids pump (BSP).

Alfred Häuptli

Each individual feeder is suspended on a type SFT III digital load cell. This design allows each feeder to be individually swivelled up to 90°. In addition, the feeder concept permits easy cleaning, sampling, calibration and product changeover without interrupting the process. The output from each feeder drops due to gravity into a central collecting hopper mounted underneath it and is continuously fed to the downstream process, such as a mixer, extruder, reactor or similar. The modular design of the K4G station means that a refill valve and a Hurricane vacuum conveying system can be easily added using the stand and support structure. The refilling control is integrated into the feeder control package. Refilling can also take place using a Big Bag discharge station, bag dumping devices or containers (IBC). The K4G blender station can be configured according to the product characteristics, the number of different products and the required feed rates. The compact and modular design of the K4G blender station allows arrangements with one, four, six or eight feeders, including Hurricane receivers.
Screw or BSP feeder
The T20 twin-screw feeder is normally selected for medium-flowing or sticky powder additives. The feed range extends from 2 l/h to 200 l/h. Concave and full-blade twin screws with a small or large pitch are available. Twin-screw-feeders have intermeshing screws with excellent self-cleaning properties. The BSP is the ideal feeding device for free and medium-flowing powders and pellets. The bulk solids pump (BSP) has been designed and engineered to provide gentle, precise feeding of free-flowing pellets, granules, flakes and powders. The BSP uses no traditional screws, belts or vibratory trays to convey the material. Instead, it utilizes positive displacement action to feed free-flowing material, offering uniform discharge, consistent volume and gentle handling. The BSP feeders have vertical rotating discs that create a product lock-up zone, conveying the material smoothly from the inlet to the discharge point and achieving a true linear mass flow, high short-term accuracy and a turndown ratio of 1:100. The simple design of the feeders makes them very easy for the operator to clean. The feed range of a K4G station starts at 0.1 l/h and reaches 3,000 l/h per ingredient.
Controlling
Each feeder comprises an integrated vacuum receiver. There is enough storage above the feeder to ensure proper operation for each loss-in-weight feeder. The feeders additionally feature an integrated control box, consisting of a local operator interface, a feeder controller module and a motor drive board, including an interface module to communicate via RS485 with any host computer system. Users can choose between several different communication protocols like Profibus, Modbus and Ethernet.
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