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Pressure-independent balancing and control valve AB-QM. DN 15, Q = 650 l/h, external thread G 3/4A. More information
Delivery to Belgium (days are avarages)
DHL Express: 1.2 workdays, € 16,94
| Connection size | DN 15 |
| Connection Type | External thread |
| Flow | 650 l/h |
| Medium Temperature | 95 °C |
| Weight | 0.59 kg |
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Download PDFThe AB-QM 4.0 valve is the latest continuation of the Danfoss AB-QM series of pressure-independent balancing and control valves. The new valve design is crafted with maximum consideration for the high demands and needs of heating and air conditioning systems. It is characterized by high precision, long lifespan, and excellent user comfort. The valve is used for automatic balancing, flow and pressure regulation, and maintaining constant pressure inside the valve.
In combination with a Danfoss actuator, it serves for precise flow regulation and offers high comfort and favourable overall operating costs. The AB-QM 4.0 was developed to minimize total costs. Its aim is to provide an affordable solution for customer projects with regard to quality and durability. It is suitable for offices, hotels, hospitals, and buildings where precise temperature regulation is needed, such as in laboratories and research institutes.
The valve can be manually set using a rotary knob with a visible scale. The setting remains visible even after connecting the actuator, as it can be seen not only from above but also from the side. The scale from 1 to 10 indicates the percentage flow setting in values of 10...100% flow. The valve also operates with a stroke limitation function.
The AB-QM 4.0 is characterized by high precision in flow measurement. Optional test plugs with a standard centre-to-centre distance of the plugs are available.
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 construction 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 for purchase in variants 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 for the AB-QM 4.0 has been redesigned and now boasts lower friction and lower hysteresis. The soft parts are again made from PPSU polymer.
The control valve has 100% authority thanks to the integrated differential pressure regulator, ensuring stable regulation at all times. The compact design allows for installation even in small spaces, such as in 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. This saves time before commissioning.
Once the system is installed, it no longer needs to be balanced thanks to the AB-QM valves, 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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