AB-QM

Product store

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.

Documents

Documents
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

AB-QM – Pressure Independent Balancing and Control Valve (PIBCV)

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.

DXF files for AB-QM DN 10-32, DN 40-50, DN 50-100, DN 125-250
ZIP 158 KB

In this file you can find CAD files (DXF) for AB-QM DN 10-32, DN 40-50, DN 50-100 and DN 125-250
RFA files for AB-QM DN 125-250
ZIP 799 KB

In this file you can find REVIT models (RFA) for AB-QM DN 125-250 for versions 2016, 2017 and 2018.

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.

Danfoss C.H. Software

Videos

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.