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, PICVs 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.
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.
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.
New: AB-QM 4.0
Get ready for the next level value of your PICV designs.
|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|
|Data sheet||AB-QM 3TP, Flow Checker (DN 40-250)||English||Multiple||10 May, 2017||432.8 KB|
|Brochure||Application of AB-QM in cruise ships: Significant energy savings and optimal passenger comfort||English||Multiple||05 Sep, 2014||1.8 MB|
|Brochure||Energy saving solutions for renovation of heating and cooling systems||English||Multiple||10 Sep, 2014||5.9 MB|
|Brochure||Hotel application brochure||English||Multiple||03 Sep, 2014||654.7 KB|
|Application guide||HVAC Application guide||English||Multiple||26 Oct, 2020||19.4 MB|
|Brochure||Hydronic Balancing & Control product overview||English||Multiple||12 Dec, 2016||1.1 MB|
|Brochure||Hydronic Balancing & Control product overview||English||United Kingdom||11 Nov, 2014||7.1 MB|
|Case story||NovoCon - outstanding HVAC flexibility after office building renovation||English||Multiple||28 Sep, 2020||960.1 KB|
The pressure independent balancing and control valve 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
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.
High-end climate solutions in Waldorf Astoria by Hilton, Amsterdam, the Netherlands
Application: Hydronic balancing and control for radiator heating and fan coil cooling
Challenge: Establish top level comfort and minimum energy consumption for heating and cooling
Solution: Fan-coil units for cooling; 8 heating risers and radiators equipped with Danfoss products.
Energy comfort in Prime Tower, Zurich, Switzerland
The Prime Tower in Zurich is a building of many records. With its 126 meters it is the tallest building in Switzerland with 36 floors and 40,000 square meters accommodating mostly offices. And with its more than 6,000 AB-QM valves it is also one of the biggest heating and cooling installations ever designed and installed by Danfoss.
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.
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.
3D models and drawings
NovoCon® S Digital Actuator
With NovoCon® S Danfoss revolutionizes the way hydronic balancing and HVAC control work together. The first of its kind digital HVAC actuators are directly connected with a Building Management System (BMS). This enables System Integrators to design state-of-art, Internet of Things (IoT) solutions.
AB-QM 4.0 Pressure Independent Control Valves (PICV) DN15 - DN20
AB-QM 4.0 Pressure Independent Control Valves (PICVs) are the successor of Danfoss AB-QM. They offer best-in-class specifications and easy installation. The scaling- and clogging resistant design secures and outstanding reliability and long lifetime. They fit to the NovoCon S digital actuators. This enables HVAC data collection for e.g. remote commissioning and predictive maintenance, resulting in a lower Total Cost of Ownership.
Danfoss SET 365 software
Our advanced Danfoss SET 365 3D design software will help you to design and calculate HVAC systems with Danfoss products. A 1-year subscription is FREE available for students, designers and other interested professionals.