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Pressure-independent balancing and control valve AB-QM. DN 15, Q = 650 l/h, internal thread Rp 1/2. More information
Delivery to Belgium (days are avarages)
DHL Express: 1.2 workdays, € 16,94
| Connection size | DN 15 |
| Connection Type | Internal thread |
| Flow | 650 l/h |
| Medium Temperature | 95 °C |
| Weight | 0.61 kg |
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Download PDFThe AB-QM 4.0 valve is the latest advancement 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 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 provides 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 a focus 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 set using a rotary knob with a displayed 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 from 10...100% of the flow. The valve also operates with a stroke limitation function.
The AB-QM 4.0 is distinguished by its high accuracy in flow measurement. Optional test plugs are available with a standard centre-to-centre distance.
Unlike older models, the AB-QM 4.0 is designed for higher pressures PN 25 / 360 PSI. It also allows for a wider range of flow regulation. Each valve size now also exists in three variants of design flow. 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 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.
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 buildup and 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 subsequent balancing, eliminating the need for complicated sequential 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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