• Overview
  • Documents
  • Tender texts
  • 3D models and drawings
  • Software
  • Videos
  • Case studies

Danfoss AB-QM was the first of its kind control valve for HVAC heating and cooling applications. It is a control valve with automatic flow limitation and built-in differential pressure control functioning over the control valve. The result of this concept is a high performing control valve with a – still - unique valve authority of 100%. The design flow can easily be set to the needed amount by using a 20-100% scale. Simply setting the design flow replaces traditional commissioning processes, gives a much more accurate control and avoids Kv calculations for system designers.

When equipped with a Danfoss actuator, PIBCV's increase the energy efficiency and improve the indoor climate. The AB-QM is mainly used for air handling units, climate ceilings, fan-coil units and other terminal units in HVAC heating and cooling systems.

Features and benefits

Easy setting and sizing

Selecting the right AB-QM is much less complicated than sizing and selecting conventional control valves. Once the design flow is determined the matching AB-QM can be selected, no additional Kv and authority calculations are required.

100% authority

Having a 100% valve authority increases the control quality and precision, also at low flow requirements. This creates a better comfort in the building, as well as increasing the energy savings.

Perfect control

By providing the right flow at the right time, the AB-QM optimizes chiller and boiler efficiency and reduces pumping costs. In addition, the actuators need to make much less movements, increasing the lifetime value and lowering the Total Cost of Ownership.

Hydronic balancing and control with Danfoss AB-QM

Brief explanation of the principle of automatic balancing & control of fancoil units in office buildings. Including the benefits of using Danfoss' AB-QM valve compared to traditional balancing valves.


Type Name Language Valid for Updated Download File type
Brochure AB-QM - Millions of reasons to choose the best English Multiple 02 May, 2018 5.0 MB .pdf
Data sheet AB-QM 3TP, Flow Checker (DN 40-250) English Multiple 10 May, 2017 432.8 KB .pdf
Brochure Application of AB-QM in cruise ships: Significant energy savings and optimal passenger comfort English Multiple 05 Sep, 2014 1.8 MB .pdf
Brochure Energy saving solutions for renovation of heating and cooling systems English Multiple 10 Sep, 2014 5.9 MB .pdf
Brochure Hotel application brochure English Multiple 03 Sep, 2014 654.7 KB .pdf
Application guide HVAC Application guide English Multiple 26 Oct, 2020 19.4 MB .pdf
Brochure Hydronic Balancing & Control product overview English United Kingdom 11 Nov, 2014 7.1 MB .pdf
Brochure Hydronic Balancing & Control product overview English Multiple 12 Dec, 2016 1.1 MB .pdf
Case story NovoCon - outstanding HVAC flexibility after office building renovation English Multiple 28 Sep, 2020 960.1 KB .pdf

Tender texts

The pressure independent balancing and control valve which means that the control characteristic is independent from the available pressure. The precise flow control performance of the AB-QM with a Danfoss actuator provides increased comfort and superior Total Cost of Ownership. The AB-QM ensures and control the required flow on every terminal unit and maintains Hydronic balance in the system.

AB-QM has following features:

  • Flow limitation function
  • Modulating below 1% of set flow, regardless of the setting
  • Authority of 1 at all settings
  • Able to close against 16 bar of differential pressure
  • Linear control characteristic
  • Scale in percentage of flow
  • Control ratio 1:1000
  • Test plugs for pump optimization and flow verification for DN 10-250

Available in the range from DN 10 – 250 from one supplier.

  • Characteristic changed from linear to equal percentage characteristic at all sizes by adjusting actuator settings
  • Lockable setting
  • Starting pressure of 16 kPa for DN 10 – DN 20
  • Starting pressure of 20 kPa for DN 25 – DN 32
  • Starting pressure of 30 kPa for DN 40 – DN 250
  • Leakage rate of no visible leakage for DN 10 - DN 20 in combination with recommended actuator
  • Leakage of 0.05 % of the Qnom for DN 25 - DN 100 in combination with recommended actuator
  • Leakage of 0.01 % of the Qnom for DN 125 - DN 250 in combination with recommended actuator

3D models and drawings

BIM Library

Download our REVIT family BIM ready models and start working with our products in 3D building information modelling programs such as Autodesk REVIT and MagiCad.


Danfoss C.H. software

Danfoss C.H. software

Our advanced Danfoss C.H. software will help you to design and calculate the perfect heating or cooling installation with Danfoss products.


Case studies

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    HVAC Flexibility and Energy monitoring in multi-tenant healthy & smart office

    Building: Office
    Application: Hydronic balancing and remote control of 4-pipe heating/cooling change-over system.
    Challenge: Gaining BREEAM credits for energy monitoring and ensure fast, fail free installation.
    Solution: Digital NovoCon S actuator combined with AB-QM 4.0 PICVs and ChangeOver6 Energy. The combination balances the system hydronically, allow remote access via a BMS and provides actual energy consumption data per climate panel during both heating and cooling operation.

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    Hydronic balancing in SAMBA bank head office, Riyadh, UAE

    At the heart of the new King Abdullah Financial District in Riyadh stands the impressive SAMBA head office. The 40-storey building represents a landmark in sustainable architecture and engineering and forms an attractive work space for the 800 people working in the SAMBA Financial Group head office.

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    Floreasca Park: Danfoss PIBCV solution offers the perfect balance in the greenest office building in Bucharest, Romania
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    Hydronic balancing in Burj Khalifa, Dubai, UAE
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    Balancing valves in Sky Tower, Wroclaw, Poland

    The tallest building of the EU now resides in Wroclaw in Poland. As a beautiful landmark to modern architecture, high user comfort and sustainable practice, the 212 meter high Sky Tower forms the pleasant setting for thousands of people living and working in the building.