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

Best-in-class PICV with scaling and clogging resistant design

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 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- 1200 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 – 1900 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 – 3800 l/h, with test plugs, with internal or external thread
• DN 32, in normal Flow and High Flow for design flows from 360 – 5000 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 Flexo solution for Fan Coil Units

Increase flexibility and save time during installation, commissioning and servicing of 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 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 and EPP insulation are available.

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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.

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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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.