Danfoss AB-QM was the first of its kind 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 of 100%.
But the value the AB-QM 4.0 valves provide has improved a lot. AB-QM 4.0 is the best-in-class 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 increases to 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 buildings with Internet of Things (IoT) solutions.
AB-QM 4.0 is designed to be the indisputable best PICV. The control performance is best-in-class 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.
AB-QM 4.0 is designed to have a long lifetime. It has best-in-class 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.
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.
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.
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:
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.
Get ready for the next level value of your PICV designs.
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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 – 1200 l/h. The DN20 sets come with a Normal Flow or High Flow AB-QM 4.0 valve and cover design flows from 110-1900 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.
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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.
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 65-650l/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.
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What exactly are the differences between AB-QM and AB-QM 4.0?
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Increase installation flexibility with AB-QM 4.0 preassembled and pressure tested connection sets for Fan Coil Units and Radiant panels.
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.
To take advantage of the combined balancing and control features of Danfoss AB-QM it has to be equipped with actuators controlled by room thermostats or a Building Management System. Danfoss offers a broad range of actuators varying from thermal on-off to digital step motor actuators with bus communication.
Find out more about our smart, Building Management System (BMS) connected, HVAC solutions here:
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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.
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!
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.
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:
We offer expert hydronic HVAC design and consultancy services at Danfoss' Design Support Center.
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