The ZFP 400/800 discharge and dosing device for dumping sacks, buffer or weighing containers is a mechanical unit for discharging and dosing powdery bulk materials. It can be installed under tanks of any size.
As with the silo discharge and dosing device ZDM 400, up to 2 independently working dosing screws can be attached to the ZFP 400, and up to 4 dosing screws can be attached to the ZFP 800 and the silo discharge and dosing device ZDM 800.
The main component of the ZFP 400/800 discharge and dosing device is the discharge shaft, which is driven in rotation by a geared motor in the cone of the container.
Flexible metal springs made of stainless steel, which are attached to a hub, are located on 3 levels on the discharge shaft. These metal springs are preloaded and remain wrapped around the hub as long as product is flowing freely. The centric discharge of the product is supported by the rotation of the discharge shaft.
If bridges form in the cone of the container and there is no longer any counter-pressure from the product, the metal springs unroll and mechanically scratch the bridges that have formed.
This results in an even flow of product into the dosing screws.
The rigid agitator arms connected to the discharge shaft on the bottom of the ZFP 400 or ZFP 800 discharge and dosing device ensure that the cantilevered dosing screw (soulless spiral) is completely filled with the product, so that an exact dosing of the discharge quantity is achieved (volumetric dosing, +/ – 3%).
The use of a frequency converter for the geared motor of the dosing screw results in a linear discharge curve (assuming constant bulk density)
The volumetric Sodimate feeder can be expanded into a gravimetric dosing system in combination with weighing technology. This is useful, for example, in the case of large fluctuations in bulk density and more precise requirements for dosing accuracy.