AB-QM 4.0

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  • AB-QM 4.0
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Danfoss AB-QM 4.0 pressure-independent balancing valve (PICV)

Introducing AB-QM 4.0

Engineering the best PICV valve for HVAC 4.0 in smart buildings.

AB-QM 4.0 hydronic enabler for smart buildings

With the AB-QM 4.0 Pressure Independent balancing and Control Valves (PICV), the product range of pressure independent valves for HVAC heating and cooling systems has been extended. The valves are designed for use in combination with conventional, modulating or on/off, actuators. Or for the Danfoss NovoCon® S digital actuator, which can be integrated into Building Management Systems (BMS) via BACnet or Modbus bus-communication. This innovative combination enables HVAC 4.0 solutions in smart commercial buildings concepts such as hotels or offices.


Why PICVs are the best choice control valves in HVAC systems

A buildings’ HVAC system is designed according geographical determined 'worst case' climate conditions. In practice these most demanding conditions seldom occur. As result, the HVAC system operates in partial load conditions most of the time. Achieving hydronic balance while the flow in the system constantly fluctuates requires a dynamic balancing solution. PICVs not only dynamically balance the system. Once equipped with an actuator they also control the flow, allowing more or less water through terminal units to provide rooms with correspondingly more or less heating or cooling.

The main benefit of PICVs:

  • 2 functions combined in 1 product
  • Accurate pressure independent control performance and 100% valve authority
  • Easier to design and commission
  • Increased HVAC energy-efficiency

Besides these main benefits there are also complementary benefits:

  • Longer lifetime of the actuators, reducing the operational costs
  • Increased comfort and less complaints
  • Increased efficiency of boilers and/or chillers

AB-QM 4.0

We created PICVs now we redefine the value

Danfoss AB-QM 4.0 is the enabler for HVAC 4.0 in smart buildings. It is a completely new designed Pressure Independent Control Valve (PICV) for terminal units such as fan coil units, chilled beams, and climate panels. It still features the unique AB-QM 100% valve authority for best-in-class control performance. But we have redefined the value in four different areas:

Explore AB-QM 4.0 in more detail

Discover more details of AB-QM 4.0 by clicking the below link. The product page offers you links to relevant documentation, BIM files and much more:

  • Danfoss AB-QM 4.0 pressure-independent control valve (PICV) for hydronic balancing
    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 AB-QM 4.0 Flexo sets
    AB-QM 4.0 Flexo

    Increase installation flexibility with AB-QM pre-assembled and pressure tested connection sets for Fan Coil Units.


Actuators for AB-QM 4.0

Find out more about AB-QM 4.0 matching actuators here:

  • NovoCon® S and M Digital Actuators - Danfoss
    NovoCon® Digital actuators

    With NovoCon® 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.

  • AME modulating gear actuator
    Gear actuators for AB-QM and AB-QM 4.0

    AME and AMV gear actuators with modulating and 3-point control for AB-QM and AB-QM 4.0 PICVs.

  • Danfoss TWA-Q & ABMM A5 thermal actuators
    Thermal actuators TWA-Q and ABNM A5

    TWA-Q and ABNM A5 thermal actuators with on/off and 0-10V control for AB-QM and AB-QM 4.0 PICVs.


  • AB-QM 4.0 Flexo connection set voor Fan Coil Units
    NEW: AB-QM 4.0 Flexo
    Monday, October 19, 2020

    Read more about our new, compact, 8-in-1 PICV solution for fast installation, flushing and servicing of Fan Coil Units in hydronic HVAC systems as used in public and commercial buildings.

  • NovoCon® M, L and XL digital actuators
    NEW: NovoCon M, L and XL - Big news for fans of IoT solutions in smart building concepts
    Monday, August 3, 2020

    New NovoCon® M, L and XL digital actuators for AB-QM Pressure Independent balancing and Control Valves (PICV) complete the series of smart, digital, IoT actuators for hydronic HVAC applications.

  • New: Digital Design Center – one entry point for all design needs
    Friday, April 17, 2020

    Design engineers, specifiers and consultants are under a constant pressure when looking or the best solutions for their designs and customers. To simplify their work and save time, we have developed a new online platform – Digital Design Center.


  • hotel room

    The hotel industry is a highly competitive sector where margins are constantly under pressure. The service towards guests must remain on a high level to hold the hotels' reputation. Saving energy is a key-differentiator. Danfoss offers comfort increasing HVAC solutions which help reduce the energy consumption.

  • Office building

    The ways office buildings are used is changing fast. Trends such as smart offices, digitalization and flexible work stations require adaptations in the technical aspects as well. Optimal indoor comfort for workers is essential. Danfoss offers comfort-increasing and energy-saving HVAC solutions.