Pressure-independent control valves

Flow controllers with an integrated control valve have multiple functions integrated in a single product – a motorized control valve, flow limitation and fixed differential pressure controller.

With three functions combined in one valve body, it significantly saves on installation space.

They are used to achieve good control, independent of pressure variations in the system, and offer the opportunity to limit maximum flow in the system. The control valve is pressure-independent and has 100% authority.

In substations with more connected circuits, using a flow controller with integrated control valve enables perfect control of each individual circuit.

It is recommended to place the controller in the return, but it can be also installed in the flow.

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.

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Documents

Type	Name	Language	Valid for	Updated	Download	File type
Data sheet	AFQM 2	English	Multiple	06 May, 2018	1.3 MB	.pdf
Data sheet	AFQM, AFQM 6	English	Multiple	21 Feb, 2017	2.0 MB	.pdf
Data sheet	AHQM (DN 15-100)	English	Multiple	24 Aug, 2016	1.3 MB	.pdf
Data sheet	AVQM (PN 16)	English	Multiple	11 Feb, 2019	720.0 KB	.pdf
Data sheet	AVQM (PN 25)	English	Multiple	11 Feb, 2019	1.0 MB	.pdf
Data sheet	AVQM-WE, AVQMT-WE	English	Austria	10 May, 2018	2.8 MB	.pdf
Brochure	Improved temperature control and hydronic balance for your benefit	English	Multiple	03 Dec, 2014	612.8 KB	.pdf
Brochure	Modern heating technology for housing associations	English	United Kingdom	21 Feb, 2017	12.0 MB	.pdf
Brochure	Save energy with efficient and safe steam distribution	English	Multiple	11 Jul, 2016	1.2 MB	.pdf
Brochure	Specifying the right district heating substation makes commercial sense	English	Multiple	04 Mar, 2015	2.4 MB	.pdf
Brochure	Take lead on your project with an efficient system concept	English	Multiple	15 Sep, 2014	7.6 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

Heat Selector

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

Open Heat Selector

Application guide

District heating application guide

We share experience, application expertise and make recommendations on optimum performing DH applications and key applied control components

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 studies

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

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.