By means of a flexible and modular design, it is possible to combine several control functions into one controller to meet the most demanding requirements across a wide range of applications.
In some applications, it may be necessary to control the flow temperature, limit maximum flow rate and primary return temperature by using a single multifunctional controller.
A typical example of such a device is the AVQMT, which works like the AVQM but with an additional self-acting thermostat (type AVT / STM).
The pressure-independent valve controls the temperature on the secondary side and the self-acting thermostat limits the return temperature. In domestic hot water systems, the thermostat can be used as a safety thermostat protecting users from scalding.
Features and benefits
Eliminates pressure variations and provides optimum operating conditions with improved temperature control quality
Made for demanding systems, resistant to corrosion, cavitation and dirt
Connected system is protected against pressure surges, fluctuations, cavitation and noise

Differential pressure and flow controllers in district heating or cooling systems (variable flow)
Balance your network, save energy and improve end user comfort by hydronic balancing and control of district energy networks.
Tools and apps
Software tools
FAQ
Case studies
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if (isSmallPicture) {
; } else if (isBigColumns) { } else { }Intelligent optimisation of district energy in new residential apartmentsTwo new build apartments in Docklands, London and Newbury Racecourse, Berkshire have been equipped with intelligent Danfoss solutions, bringing increased control and stability as well as greater than 20% peak energy reduction.
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if (isSmallPicture) {
; } else if (isBigColumns) { } else { }Leanheat makes buildings smartIn Europe, 30 percent of all energy consumption goes to heat or cool buildings. Danfoss has the solution to lower energy usage and improve indoor climate by adding a digital element: Leanheat software.
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if (isSmallPicture) {
; } else if (isBigColumns) { } else { }A cost-effective solution: district cooling in central CopenhagenEnergy efficiency was a major consideration in the design of Copenhagen’s district cooling project, where VLT® drives contribute to reducing CO2 emissions by more than 3000 t annually.
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if (isSmallPicture) {
; } else if (isBigColumns) { } else { }Solar heating plant reduces CO2 emissions by 15,700 tonnes annuallyThe world’s largest solar heating plant in Silkeborg, Denmark harnesses energy to heat the homes and workplaces of 40,000 citizens. It supplies 18-20% of the annual heat consumption in the city of Silkeborg, Denmark, which has an ambitious target of CO2 neutrality in heat production by the year 2030.
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if (isSmallPicture) {
; } else if (isBigColumns) { } else { }District energy as the heating and cooling solution in Teknopark Istanbul, TurkeyBuilding: Office
Application: Production of heating, cooling and domestic hot water
Challenge: Design and construct customized district energy solutions for all buildings on the park
Solution: Danfoss designed and constructed 3 pre-assembled DSE substations containing control valves for the heating, cooling and domestic hot water, heat meters, self-acting controllers and electronic controllers connected to a central Building Management System. -
if (isSmallPicture) {
; } else if (isBigColumns) { } else { }First ever district heating system with substations in Turkey600 residents in the town of Soma in Western Turkey now enjoy the comforts of a reliable and cheap heat supply from the town’s brand new district heating system.
In the coming years, more than 8,000 households will be joining the system that exploits the excess heat from the municipal power plant – a great improvement from the charcoal boilers of the past, and much less expensive.