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Danfoss

Multifunctional controllers

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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

Tools and apps

Heat Selector

Danfoss Heat Selector is the best-in-class online selection tool that optimizes planning process for heating application experts.

Open Heat Selector

FAQ

Can I limit a max flow with a differential pressure regulator?

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 design an installation and need lengths of valves from a project specification.

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 stories

Videos

Benefits of differential pressure and flow controllers in DH or cooling systems (constant flow)