Grundfos DME Digital Dosing Pumps are precision dosing pumps designed for a wide range of applications in various industries. Here’s a detailed explanation of their features, functionalities, and applications:

Overview of Grundfos DME Digital Dosing Pumps

Grundfos DME Digital Dosing Pumps are known for their high precision, reliability, and ease of use. These pumps are part of Grundfos's Digital Dosing™ range, which incorporates advanced digital technology to ensure accurate and consistent dosing of chemicals.

Key Features

1. High Precision:

   • The digital control ensures precise dosing, with accuracy often within ±1%. This is crucial for applications requiring exact chemical quantities.

2. User-Friendly Interface:

   • The pumps come with an intuitive interface, often featuring an LCD display and easy-to-navigate menus, allowing for straightforward operation and programming.

3. Flexibility:

   • Capable of handling a wide range of flow rates, typically from 0.0025 l/h to 940 l/h, depending on the model.

4. Programmable:

   • Users can set and adjust dosing schedules, flow rates, and other parameters electronically, providing flexibility and control over the dosing process.

5. Integrated Features:

   • These pumps often include built-in features like flow monitoring, auto-deaeration, and integrated calibration to ensure optimal performance.

6. Durability and Chemical Resistance:

   • Constructed from high-quality materials that resist corrosion and chemical damage, ensuring longevity and reliable operation even in harsh environments.

7. Safety and Reliability:

   • Advanced safety features, such as overpressure protection, fault monitoring, and automatic shutdown, enhance operational safety.

Applications

Grundfos DME Digital Dosing Pumps are utilized across various industries due to their versatility and precision. Key applications include:

1. Water and Wastewater Treatment:

   • Precise dosing of chemicals like chlorine, sodium hypochlorite, coagulants, and flocculants for disinfection, pH control, and coagulation processes.

2. Industrial Processes:

   • Dosing of additives, acids, alkalis, and other chemicals in manufacturing processes to ensure product quality and process efficiency.

3. Food and Beverage Industry:

   • Accurate dosing of flavorings, colorants, preservatives, and sanitizers to maintain product consistency and safety.

4. Chemical Industry:

   • Handling aggressive chemicals in processes like polymer dosing, pH adjustment, and various other chemical reactions requiring precise dosing.

5. Agriculture:

   • Fertigation and the controlled dosing of fertilizers and pesticides in irrigation systems to enhance crop yield and quality.

6. Pulp and Paper Industry:

   • Dosing of bleaching agents, dyes, and other chemicals used in the paper production process to achieve desired paper qualities and properties.

7. Pharmaceuticals:

   • Accurate dosing of ingredients and chemicals in the production of pharmaceuticals, ensuring compliance with stringent industry standards.

Conclusion

Grundfos DME Digital Dosing Pumps are essential tools for any application requiring precise and reliable chemical dosing. Their advanced digital technology, user-friendly interface, and robust construction make them suitable for a wide range of industries, enhancing process efficiency and ensuring consistent results.

Digital Dosing
Digital Dosing represents state-of-the-art technology.
This patented Grundfos solution sets new standards, including new principles and methods.

Precise and easy setting
The operator can easily install and set the pump to dose exactly the quantity of dosing medium required in the application. In the display, the setting of the pump is read out directly in ml/h or l/h, pulse or batch, and
the operation mode is easily identified by means of icons.

Unique technology
A unique drive and microprocessor control ensure that the medium is dosed precisely and with low pulsation even if the pump is operating with high-viscosity or degassing media. Instead of the conventional strokelength adjustment, the capacity of the DME is regulated by automatic adjustment of the motor speed during the discharge stroke and by fixed suction stroke speed, ensuring optimal and uniform mixing.

Fewer variants to cover all needs
DME pumps feature a powerful variable-speed motor, a turn-down ratio of 1:800 and a complete control interface including:
• Full pulse control
• Pulse-based batch control
• Internal timer-based batch control
• Analog 0/4-20 mA control
• Level control
• Fieldbus communication module.
This ensures that the DME pumps cover the range from 375 to 940 litres per hour up to 10 bar. The switch mode power supply ensures that the same pump is working precisely, irrespective of the mains supply (100-240 V, 50/60 Hz).
The DME dosing pumps feature diaphragm dosing head with integrated vent valve, ball valves at the inlet and outlet. The pumps are fitted with power cable and plug

Functional description
The electronically controlled variable-speed motor of the DME pump provides optimum control of the stroke speed. As shown in the figure below, the duration of each suction stroke is constant while the duration of each discharge stroke varies according to the capacity set, resulting in optimum discharge flow in any operating situation.
The advantages:
• The pump always operates at full stroke length, irrespective of the capacity set; this ensures optimum accuracy, priming and suction.
• A capacity range of 1:800 for each pump size.
• Smooth and constant dosing ensuring an optimum mixing ratio at the injection point.
• Significant reduction of pressure surges preventing mechanical stress on diaphragm, hoses, pipes, connections and other dosing parts exposed to leakage and wear.
• The installation is less affected by long inlet and outlet lines.
• Easier dosing of highly viscous and gas-containing liquids.