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Ecotherm Electromagnetic Sludge & Dirt Separation Technology Removes Particles Smaller Than 1 Micron
09/04/2026
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The Ecotherm Magnetic-Dynamic Separator (EMDS) is a proven and reliable solution designed to protect heating systems, thermal circuits, cooling loops, and Cooling & Chiller systems from corrosion, dirt, and sludge—without the need for chemical additives.
The Ecotherm EMDS electromagnetic separator effectively reduces mineral content and electrical conductivity while stabilizing the pH level of system water. By utilizing advanced electromagnetic separation technology capable of removing particles smaller than 1 micron, the system can achieve water quality in compliance with VDI 2035, ensuring long-term operational efficiency and system reliability.
Engineered for durability and performance, the Ecotherm electromagnetic dirt separator has been proven to provide permanent protection against corrosion, deposits, and sludge—delivering a sustainable, chemical-free solution for modern HVAC and energy systems.
Chemical-Free Descaling for Chiller and Heating Pipelines, Effectively Removing Adhered Scale Deposits
1. General Introduction to the EMDS Electromagnetic Dirt Separator
The Ecotherm EMDS (Magnetic-Dynamic Separator) utilizes magnetically assisted fine sludge separation to permanently remove iron-containing solid particles as small as <1 micron from the circulation system. This ensures long-term water cleanliness, promotes the formation of a protective passivation layer, and effectively prevents corrosion of metal components within the system.
High-performance permanent magnets are installed directly within the fluid circuit. Combined with optimized flow-guiding plates, the system ensures that the medium flows slowly and in a controlled manner across the magnetic field, maximizing separation efficiency and achieving superior filtration performance.
The EMDS system integrates a comprehensive 4-stage process: sedimentation, magnetic separation, water treatment, and mechanical filtration. For maintenance, the unit can be fully opened, allowing easy cleaning of both the magnetic assembly and the stainless steel filter components—ensuring long-term operational reliability and ease of service.
2. General Design of the EMDS Electromagnetic Dirt Separator
The Ecotherm EMDS electromagnetic dirt separator features a robust and industrial-grade design, including a welded steel vessel (St 37) equipped with inlet and outlet flanges in accordance with DIN 2501 / PN 16 standards. The unit is designed as an inline suspended device for installation directly within pipeline systems.
Standard components include an air vent valve, drain connection, and a removable cover for easy access. The external surface is coated for corrosion protection, with cold-water components specially insulated against condensation. Internal components are made of stainless steel, featuring a 0.5 mm mesh filter, while the separation capability reaches particle sizes as small as 0.001 mm (1 micron).
ECOTHERM EMDS Product Range
The Ecotherm EMDS series is available in multiple configurations to suit various system sizes and flow requirements:
- EMDS 01 – 07: Inline pipeline installation, available with flanged connections (DN50, DN65, DN80, DN100) and threaded options. Suitable for flow rates from 1 m³/h to 28 m³/h.
- EMDS 08 – 14: Vertical floor-mounted design, with flanged connections ranging from DN100 to DN250, supporting flow rates from 23 m³/h to 235 m³/h.
- EMDS 15 – 20: Large-capacity units with flanged connections from DN250 to DN600, designed for high flow rates from 205 m³/h up to 2100 m³/h.
This flexible product portfolio ensures optimal selection for a wide range of HVAC, district energy, and industrial applications, delivering efficient dirt and sludge separation across all system scales.
Description of the EMDS Electromagnetic Dirt Separator
The Ecotherm electromagnetic sludge and dirt separator (EMDS) consists of a pressure vessel made of St37 steel (7), featuring a removable cover (6) for internal inspection. The cover is equipped with an air vent valve (1), while the dished bottom includes a drain connection (2).
Inside the vessel, metal baffle plates (9) guide the fluid flow through high-performance permanent magnets (12) mounted directly within the system. These baffles divide the vessel into zones with varying flow velocities, optimizing separation efficiency.
At the lower section of the vessel, a perforated plate (10) separates the sedimentation chamber from the upper section. A removable filter screen (11) is installed at the protruding outlet connection (4), allowing for easy maintenance and cleaning.
Function of Ecotherm Electromagnetic Separation Technology
The system fluid passes through multiple high-intensity magnetic fields within the separator. These permanent magnets continuously capture corrosion by-products—primarily mixed iron oxides—regardless of particle size, from ultra-fine corrosion particles to larger debris.
The magnetic water treatment process promotes the formation of a passive oxide layer on metal surfaces within the system. This protective anti-corrosion layer is generated without external energy input and without the use of chemicals, ensuring a sustainable, maintenance-friendly solution for long-term system protection. The Ecotherm EMDS electromagnetic dirt separator, with its compact and optimized design, delivers a wide range of operational and performance benefits: This makes the Ecotherm EMDS an ideal solution for sustainable, chemical-free water treatment and long-term protection of HVAC and energy systems. The Ecotherm EMDS operates based on a dynamic separation principle, requiring a defined and continuous flow of medium to achieve optimal performance. The best separation efficiency is obtained when the unit is installed in the main circuit with continuous flow. The product range covers flow capacities from 1 m³/h to 235 m³/h and above, ensuring flexibility for various system scales. Standard units are designed for operating conditions with a maximum allowable pressure of 10 bar and a maximum temperature of 110°C. Other sizes and operating conditions are available upon request. All units are designed and manufactured in accordance with pressure vessel regulations and comply with the Pressure Equipment Directive 97/23/EC. Not all circuits in a heating system maintain constant flow at all times. Control systems regulate flow based on real-time heating demand. Ecotherm provides selection guidelines and installation recommendations, where flow rate is the key parameter for sizing the EMDS unit. Due to lower temperature differentials, cold water systems typically circulate larger volumes of fluid. When antifreeze is used, the density and viscosity of the medium must be considered during selection. In open systems, a significant amount of airborne biological matter can enter the cooling water. Therefore, it is recommended to install a mechanical pre-filter upstream of the EMDS to ensure optimal performance and protection. For hot water applications, unit sizing should also be based primarily on flow rate. Special configurations are available to meet specific operating conditions. Very fine iron oxides (magnetite) are typically formed in condensate systems. The EMDS is particularly effective in such applications due to its high separation efficiency for ultra-fine particles. By selecting the correct Ecotherm EMDS configuration and installation position, operators can ensure maximum separation efficiency, long-term system protection, and optimal performance across HVAC, cooling, and energy systems. Ecotherm delivers both complete turnkey systems and individual components, with each solution precisely engineered to meet specific customer requirements. With its own manufacturing facilities in Austria and a comprehensive product portfolio, Ecotherm enables the integration of all major energy sources, including oil, gas, electricity, and renewable energy. With thousands of installations over more than 40 years across Europe, the Middle East, Asia, North Africa, and Central America, Ecotherm has established itself as a leading innovator in advanced solutions for hot water, steam, and solar energy systems. Ecotherm systems are designed for 24/7 monitoring and can be maintained quickly, efficiently, and at low cost through a modern control interface. All equipment features low maintenance requirements, while maximizing energy efficiency and minimizing spatial footprint. By leveraging renewable energy, Ecotherm contributes to the conservation of valuable resources and sustainable system operation. In Vietnam, PGTECH is the authorized representative of Ecotherm (Austria), delivering integrated solutions for central hot water systems, steam systems, and advanced heat transfer technologies that are safe, efficient, and energy-saving. This includes the EMDS electromagnetic dirt and sludge separation technology, capable of removing particles smaller than 1 micron. For detailed consultation on this exclusive and innovative technology from Ecotherm, please contact us directly to receive expert support tailored to your project needs. PGTECH GROUP LIMITED – Authorized Distributor of HVAC System Products in Vietnam and Regional Markets News Editorial Board: PGTECH Engineer: Huu Truong PGTECH GROUP LIMITED Business Office: 3rd Floor, Bac Ha Building C14-CT1, To Huu Street, Dai Mo Ward, Hanoi City, Vietnam Address: No. 12, Lane 28, Tay Ho Street, Tay Ho Ward, Hanoi City, Vietnam Phone: +84-24-7302 3588/ Fax: +84-24-7302 3589 Hotline: 0962 875 986 /0962 160 126 E-mail: info@pgtech.com.vn / sales@pgtech.com.vn Website: www.pgtech.com.vn3. Advantages of Ecotherm Electromagnetic Separation Technology
4. Selection of Ecotherm Electromagnetic Dirt Separator (EMDS)
a. Hot Water Heating Systems
b. Cold Water Systems
c. Open Cooling Water Systems & Recooling Plants
d. Hot Water (Domestic / Process)
e. Condensate Systems
For best results, the unit should be installed as close as possible to the feedwater deaeration system.Conclusion
