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.
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.
Hydronic balancing and control with Danfoss AB-QM
Brief explanation of the principle of automatic balancing & control of fan-coil 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 - AD||AB-QM - Millions of reasons to choose the best||English||Multiple||21 Sep, 2018||5.0 MB|
|Data sheet - AI||AB-QM 3TP, Flow Checker (DN 40-250)||English||Multiple||04 Sep, 2018||402.0 KB|
|Engineering sheet - AL||AB-QM calculation||English||Multiple||04 Sep, 2018||485.3 KB|
|Brochure - AD||Application of AB-QM in cruise ships: Significant energy savings and optimal passenger comfort||English||Multiple||04 Sep, 2018||1.8 MB|
|Brochure - AD||Energy saving solutions for renovation of heating and cooling systems||English||Multiple||23 Oct, 2018||5.8 MB|
|Brochure - AD||Hotel application brochure||English||Multiple||04 Sep, 2018||642.4 KB|
|Application guide - AB||HVAC Application guide||English||Multiple||23 Oct, 2018||7.5 MB|
|Brochure - AD||Hydronic Balancing & Control product overview||English||Multiple||31 Oct, 2018||1.1 MB|
|Brochure - AD||Hydronic Balancing & Control product overview||English||United Kingdom||31 Oct, 2018||7.1 MB|
|Case story - AE||NovoCon - outstanding HVAC flexibility after office building renovation||English||Multiple||31 Oct, 2018||5.7 MB|
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.
Floreasca Park: Danfoss PIBCV solution offers the perfect balance in the greenest office building in Bucharest, Romania
The award-winning office complex Floreasca Park raises the bar for green office buildings. With 40% savings on the energy bill, Floreasca Park brings substantial savings to the tenants and a green footprint to the building. The new office complex, Floreasca Park in Romania, serves as an excellent example of a sustainable office building according to the international BREEAM rating.
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.
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