The volume of liquid to be dosed can range from a few grams to hundreds of kilograms. Special attention must be paid to the specific characteristics of a raw material, as density, viscosity, temperature, and reactivity can have a significant impact on the entire dosing process.
DEMIC’s control solutions take these factors fully into account. In addition, they support the control of a wide variety of pump types (piston, diaphragm, gear, etc.) and any necessary trace heating systems. Weighing of the entire dosing system is also included as standard.
All DEMIC control systems are synonymous with precision, effectiveness, and durability.
Challenges and Solutions in Handling Pastes and Liquids
Challenge ➢ Temperature Changes
Due to their viscosity, some raw materials are difficult or impossible to meter and convey.
The DEMIC Solution:
Controlling trace heating systems is a standard feature of the control system in liquid dosing applications. In addition, appropriate valve sequences ensure that the material remains in constant motion, thereby preventing it from solidifying.
Challenge ➢ Acquisition Costs
A formulation typically consists of several components. However, the pumps used for dosing can sometimes be very expensive to purchase. Often, though, a pump isn’t strictly necessary for a single raw material.
The DEMIC Solution:
With DEMIC’s control solutions, you only need one pump combined with the appropriate valves to draw materials from different containers.
Challenge ➢ Inaccuracy
Flow behavior is difficult to predict as flow rates and pressures increase. Additionally, deviations increase due to backflow from the pump and an unevenly filled pump head.
The DEMIC Solution:
All components involved in the dosing process, such as pumps and rotary valves, are weighed. By weighing the entire system—including the liquids—DEMIC’s control systems ensure 100% dosing accuracy.
The Challenge of Contamination
When mixing multiple pastes and liquids using a pump, contamination can occur quickly, leading to deviations in the formulation.
The DEMIC Solution:
After each dosing process involving a paste or liquid, special cleaning programs can be selected to clean the dosing mechanism, a container, and the lines (e.g., using cleaning fluids). This ensures that no contamination remains and that subsequent formulations are not compromised.
Would you like to learn more about our products?
We look forward to advising you:
PHONE: +49 2247 918 90
EMAIL: kontakt(at)demic-datentechnik.de
Your Contacts
Björn Demmer
Partner - Managing Director
PHONE: 02247 918 90
EMAIL: bdemmer(at)demic-datentechnik.de
Heinz Demmer
Partner - Managing Director
PHONE: 02247 918 90
EMAIL: hdemmer(at)demic-datentechnik.de