Multifunctional controllers

  • Overview
  • Documents
  • Tools and apps
  • FAQ
  • Case studies
  • Videos

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 provide 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.


Type Name Language Valid for Updated Download File type
Data sheet AVPQT (PN 25) English Multiple 24 Jan, 2017 1.6 MB .pdf
Data sheet AVQM-WE, AVQMT-WE English Austria 10 May, 2018 2.8 MB .pdf
Data sheet AVQT, AVQMT English Multiple 05 Apr, 2018 2.6 MB .pdf
Brochure Improved temperature control and hydronic balance for your benefit English Multiple 03 Dec, 2014 613.2 KB .pdf
Brochure Save energy with efficient and safe steam distribution English Multiple 11 Jul, 2016 1.2 MB .pdf
Brochure Track down and solve any hydronic imbalance with self acting controls English Multiple 29 Mar, 2015 14.7 MB .pdf

Tools and apps


Yes you can. Open the control valve fully and set the max flow by adjusting the differential pressure. You can also calculate the appropriate differential pressure, but you need to know the exact capacity of the control valve.

We produce valves with a standard length. You can also find the measures in our datasheet or download 2D and 3D CAD drawing models from our product presentations. Please go to our product catalog where you will find links to documentation and drawings - follow the below link.

Case studies

  • In Helsinki a total of 667 addresses in a mix of large and small buildings and apartments have had the Leanheat software installed.
    Leanheat makes buildings smart
    In 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.
  • Solar heating plant reduces CO2 emissions by 15,700 tonnes annually
    Solar heating plant reduces CO2 emissions by 15,700 tonnes annually
    The 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.
  • District energy as the heating and cooling solution in Teknopark Istanbul, Turkey
    Building: 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.
  • First ever district heating system with substations in Turkey
    600 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.
  • District heating network in HafenCity, Hamburg, Germany
    The district heating supply in the new Hamburg city quarter "HafenCity" is a cost-effective and sustainable solution amongst other supplied by Danfoss.
  • Buildings connected to district heating, Tuzla, Bosnia
    So far, 70% of all buildings in the city have been connected to the district heating system and the network is gradually being optimized. In the near future, two hospitals, one of them a big regional center, will be connected as well.