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Pressure-independent balancing and control valve AB-QM 4.0. DN 20, Q = 1900 l/h, internal thread Rp 3/4. More information
Out of stock - can be requested
| Connection size | DN 20 |
| Connection Type | Internal thread |
| Flow | 1900 l/h |
| Medium Temperature | 95 °C |
| Weight | 0.68 kg |
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Download PDFThe AB-QM 4.0 valve is the latest evolution in the series of pressure-independent balancing and control valves from Danfoss. The new valve design is crafted with the utmost consideration for the high demands and needs of heating and air conditioning systems. It is characterised by high precision, long service life, and excellent user comfort. The valve is used for automatic balancing, flow and pressure regulation, and maintaining constant pressure within the valve.
In combination with a Danfoss actuator, it provides precise flow regulation, offering high comfort and favourable overall operating costs. The AB-QM 4.0 was developed to minimise total costs. Its aim is to provide an affordable solution for customer projects with an emphasis on quality and durability. It is suitable for offices, hotels, hospitals, and buildings where precise temperature regulation is required, such as in laboratories and research institutes.
The valve can be manually adjusted using a rotary knob with a visible scale. The settings remain visible even after connecting the actuator, as they can be seen from both the top and the side. The scale from 1 to 10 indicates the percentage flow setting in values from 10...100% of the flow. The valve also operates with a stroke limitation function.
The AB-QM 4.0 is characterised by high precision in flow measurement. Optional test plugs are available with a standard centre-to-centre distance of the plugs.
Unlike older models, the AB-QM 4.0 is designed for higher pressures PN 25 / 360 PSI. They also allow for a wider range in flow regulation. Each valve size is now available in three design flow variants. You can choose a valve from low flow (LF), normal, and high flow (HF).
The system with AB-QM operates in a variable flow mode. The exact amount of water needed at any given time flows to each appliance. This makes the entire system more economical.
The valve is now available in versions with internal or external threads. This product comes with an external thread. The sizes of the threaded connections range from DN 15 to DN 32.
The integrated internal pressure regulator has been redesigned for the AB-QM 4.0 and now boasts lower friction and lower hysteresis. The soft parts are again made from PPSU polymer.
Thanks to the integrated differential pressure regulator, the control valve always has 100% authority, ensuring stable regulation. The compact design allows for installation even in small spaces, such as fan coil units.
The interior of the valve is made from DZR brass materials, while the soft parts are made from PPSU polymer. This reduces the risk of limescale build-up and its subsequent flaking, which could cause valve clogging. The stroke of all valve sizes is now 4 mm for all.
The entire valve body is made from DZR brass as a single piece. The new design allows for bidirectional flushing and filling, saving time before commissioning.
Thanks to the AB-QM valves, the completed system no longer needs to be balanced, eliminating the need for complicated step-by-step measurements and time-consuming adjustment corrections as with other valves.
We respond to your product queries as quickly as possible, usually within 24 hours.
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