Skip to main content
Danfoss

AB-QM 4.0 Pressure Independent Control Valves (PICV) Size S DN15 - DN32

Product store
Danfoss AB-QM 4.0 Pressure-Independent balancing and Control Valve (PICV) with external thread and test plugs

Top-class PICV for hydronic HVAC balancing and control

Danfoss AB-QM was the first of its kind pressure independent control valve for HVAC heating and cooling applications. AB-QM 4.0 is its next level successor.

The basic principles haven’t changed; It is a control valve with automatic flow limitation and built-in differential pressure controller. The control performance is very accurate and the valve has a – still – unique valve authority close to 100%.

But the value the AB-QM 4.0 valves provide has improved a lot. AB-QM 4.0 is the most advanced PICV currently on the market. The AB-QM 4.0 is available in DN 15 up to DN 32. There are versions with and without test plugs. And versions with internal or external thread connections. The flow capacity covers a broad range of 20 l/h up to 5,000 l/h and can accurately be measured with the PFM 1000 measuring instrument via Bluetooth on iOS and Android devices.

AB-QM 4.0 is engineered to be the indisputable best PICV on the market. For example it has a scaling & clogging resistant design, PN25 Nominal Pressure, accurate flow measuring and bi-directional filling and flushing. These provide many advantages for designers, installers and end-users.

PICV's increase the energy efficiency of HVAC heating and cooling systems. AB-QM 4.0 is designed for terminal units such as fan-coil units, climate ceilings and chilled beams. Equipped with one of our actuators they accurately control the room temperature and improve the indoor climate. In case it's equipped with our digital actuator, NovoCon® S, it enables HVAC 4.0 systems for smart building solutions.

Features and benefits

Specification and installation of pressure-independent control valves
Specification & installation

AB-QM 4.0 is designed to be the indisputable best PICV. The control performance is unrivaled and the PN25 valve body meets every requirement. The design flow can accurately be set, is visible when an actuator is mounted and can accurately be measured with PFM 1000. There are models with internal or external thread, with or without test plugs. The bi-directional filling and flushing simplifies the commissioning process.​

The best choice when you want a tender winner​.

  • Unrivaled control performance from 10-100% setting
  • Visible setting scale with mounted actuator
  • Accurate flow measuring
  • Versions Low Flow (LF), Normal Flow (NF) and High Flow (HF)
  • Versions with internal or external thread
  • Valve body PN25, DN 15-32
  • Bi-directional filling and flushing
Danfoss AB-QM 4.0 pressure-independent control valves offer improved reliability and robustness
Reliability & robustness

AB-QM 4.0 is designed to have a long lifetime. It has unmatched reliability. With the inner construction made from a dedicated Polymer the valve is significantly less sensitive for scaling and clogging. As result it is the best performer in lifetime tests. For projects extended warranty periods are possible.​

 

 

The best choice when you want a superior quality for a long time​.

  • Unrivaled reliability and robustness
  • Scaling and clogging resistant design
  • Successful lifetime performance tests
  • Extended warranty periods for projects
AB-QM 4.0 is the optimal choice for connected buildings
Connectivity & data

AB-QM 4.0 is designed to fit the NovoCon® S high accuracy digital actuator with BACnet or Modbus bus communication. This actuator allows for plug & play BMS integration and offers many benefits. The HVAC system can remotely be commissioned or flushed to save valuable time. Extended system data is provided to the BMS for e.g. predictive maintenance, alarms or fast error detection.​

The best choice when you want connectivity and data​.

  • Plug & play BMS integration with BACnet or Modbus bus communication
  • Remote commissioning, flow setting, flushing, error detection
  • HVAC data collection
  • Predictive maintenance
  • Optional Active Energy Management, Remote I/O or 4-pipe ChangeOver
Danfoss AB-QM 4.0 pressure-independent balancing valves offer high ROI and low total cost of ownership
TCO & ROI

AB-QM 4.0 is designed to lower  design, installation, commissioning and operational costs. It allows a faster handover time in projects. The established hydronic balance provides optimal user comfort at the lowest energy consumption. This results in the best possible HVAC system efficiency. The building value increases, allowing a higher rental price per m2 to optimize the Return on Investment.

The best choice when you want the lowest cost of ownership.​

  • Lower installation costs
  • Shorter handover phase
  • Lower running costs
  • Premium user comfort
  • Excellent HVAC system efficiency
Danfoss AB-QM 4.0 Pressure Independent balancing and Control valve (PICV) DN20 with inner thread and no test plugs

AB-QM 4.0 Product range

The AB-QM 4.0 portfolio offers a wide range of options for all hydronic HVAC applications such as Fan Coil Units, Chilled beams and radiant panels. Here is a quick glance into the many options:

  • DN 15 in Low Flow, Normal Flow and High Flow for design flows from 20- 1,200 l/h, with or without test plugs, with internal or external thread
  • DN 20, in Low Flow, Normal Flow and High Flow for design flows from 110 – 1,900 l/h, with or without test plugs, with internal or external thread
  • DN 25, in Normal Flow and High Flow for design flows from 230 – 3,800 l/h, with test plugs, with internal or external thread
  • DN 32, in normal Flow and High Flow for design flows from 360 – 5,000 l/h, with test plugs, with internal or external thread

For every DN size valve there is also an optional to use insulation scale to minimize heat losses from the valves and simplify overall insulation of the heating system.

AB-QM 4.0: We created PICVs - now we redefine the value

AB-QM 4.0

Get ready for the next level value of your PICV designs.

AB-QM 4.0 prefab connection sets

Danfoss AB-QM 4.0 Flexo left-hand version - Fan Coil Unit connection set

AB-QM 4.0 Flexo solution for Fan Coil Units

Increase flexibility and save time during installation, commissioning and servicing of two-or four-pipe connected Fan Coil Units (FCUs) with AB-QM 4.0 Flexo. It's a pre-assembled and pressure tested connection set, designed for increased installation flexibility and prefab projects. The set consists of an AB-QM 4.0, two 3-way ball-valves, a strainer, a drain valve and three test plug connections for pressure- or flow measurements. With these the set provides an 8-in-1 solution for hydronic balancing, control, measuring, installation, flushing, filling, draining and servicing of the Fan Coil Units they are installed on.

AB-QM 4.0 Flexo is available in two versions, left-hand and right-hand, and two dimensions; DN15 and DN20. Sets in DN15 contain an AB-QM 4.0 PICV valve with Low Flow, Normal Flow or High Flow, covering design flows from 20 – 1,200 l/h. The DN20 sets come with a Normal Flow or High Flow AB-QM 4.0 valve and cover design flows from 110-1,900 l/h.

For both DN15 and DN20 sets matching flexible, stainless steel, pipes are available. For the left-hand version there is also an EPP insulation cover.

View the 3D model

AB-QM 4.0 CO6 Flexo solution for Radiant Panels

The Danfoss AB-QM 4.0 CO6 Flexo standardized prefab connection set is an innovative solution to make the design, installation, and service on radiant panels or chilled beams in four-pipe heating and cooling change-over systems easier, faster, and more reliable. With a built-in height of just 125 mm, the set will match all requirements. The special ‘click-fit’ connections ensure watertight connections and provide maximum installation flexibility. They also allow fast and easy disassembly and replacement of the AB-QM 4.0 or ChangeOver6 valves. Each individual set is pressure tested after it is assembled.


Danfoss AB-QM 4.0 CO6 Flexo - Pre-fab radiant panel connection set with 18mm connections for press-fit

AB-QM 4.0 CO6 Flexo is available in DN15 Low Flow for design flows between 20-200 l/h, and in DN15 Normal Flow for design flows between 65-650 l/h. There are versions with 18mm connections for press-fit, or ½” internal thread. For a fully automated change-over from heating to cooling operation or vice-versa, including remote recommissiong of the design flow setpoint, the set should be equipped with NovoCon® S digital IoT actuator and NovoCon CO6 (Energy) change-over actuator. Alternatively the AB-QM 4.0 can be equipped with AME 110NL(X) modulating actuator for 0(2)-10V or 0(4)-20mA control. In that case the regular CO6 change-over actuator needs to be activated by a dedicated control signal.

The AB-QM 4.0 valve can be equipped with optional EPP insulation to limit the heat losses during heating operation. Customized insulation of the entire set is recommended.

View the 3D model

Documents

Documents
Type Name Language Valid for Updated Download File type

3D models and drawings

BIM library for MEP designs

Get your 3D BIM objects and start design HVAC 4.0 for smart buildings.

Open in MagiCAD Cloud
New interactive eBrochure: AB-QM PICVs and Actuators

Download the new eBrochure for the full range overview, detailed specifications, and links to product datasheets.

Download

Related products

Danfoss HVAC 4.0 solutions for smart buildings

This is where the HVAC transformation starts

Find out more about our smart, Building Management System (BMS) connected, HVAC solutions here:

Software

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.

Danfoss SET 365 software
Danfoss set 365 software

AB-QM selection tool

You can now easy find the right size and/or pre-setting of your AB-QM valves using our new AB-QM selection tool. Try it out here!

Try the tool
AB-QM selection tool

Warranty

The standard product warranty on AB-QM 4.0 is 2 years. For projects we can agree on an extended warranty period for a full peace of mind. Contact a Danfoss sales representative to find out more.

News

Coming soon...

Coming soon...

Tender texts

AB-QM 4.0 – Pressure Independent balancing and Control Valve (PICV)

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 4.0 with a Danfoss actuator provides increased comfort and superior Total Cost of Ownership. The AB-QM 4.0 ensures and control the required flow on every terminal unit and maintains Hydronic balance in the system.

AB-QM 4.0 has following features:

  • Automatic 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
  • Polymer (PPSU) components of differential pressure controller and control valve cone
  • Linear control characteristic
  • Linear setting
  • Scale in percentage of flow
  • Minimum setting is 10%
  • Setting of flow percentage is visible with actuator mounted
  • Control ratio 1:1000
  • Pressure stage PN25
  • All inner brass parts from DZR (CW602N)
  • Available in the range from DN 15 – 32 for design flows from 20 – 6,000 l/h from one supplier
  • Available with external thread acc. ISO 228/1 and internal thread acc. ISO 7/1
  • Available with test plugs for pump optimization and flow measurements (dpcv)
  • Flow measurements accuracy according to BS7350:1990
  • Characteristic can be changed from linear to equal percentage characteristic at all sizes by adjusting actuator settings
  • Filling and flushing is possible in flow and counter-flow direction
  • Starting pressure of 16 kPa for DN 15 – DN 20 and 20 kPa for DN 25 – DN 32
  • Starting pressure of 32 kPa for DN 15 – DN 32 HF versions
  • Leakage rate of no visible leakage for DN 15 - DN 32 in combination with recommended actuator (IEC 60534-4:2007 Class IV)