Name: Balancing valve Danfoss AB-QM 4.0 DN 20 with measuring fittings, 1,1 m3/h, internal thread
Brand: DANFOSS
Price: 227.88 EUR
Availability: OutOfStock

Parameters and catalogs

Connection size	DN 20
Connection type	Internal thread
Flow	1100 l/h
Medium temperature	95 °C
Weight	0.74 kg

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ASSEMBLY INSTRUCTIONS download

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LEAFLET download

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The AB-QM 4.0 valve is the state-of-the-art successor to the Danfoss AB-QM range of pressure-independent adjustment and control valves. The new valve design is designed with maximum regard to the high demands and needs of heating and air conditioning systems. It is characterized by high accuracy, long life and excellent user comfort . The valve is used to automatically adjust, regulate flow and pressure and maintain a constant pressure inside the valve.

In combination with the Danfoss actuator, it serves for precise flow control and brings high comfort and favorable overall operating costs. AB-QM 4.0 was developed to minimize overall costs. Its goal is to bring affordable solutions for customer projects with regard to quality and durability. It is suitable for offices , hotels, hospitals and buildings where precise temperature control is required, even in laboratories and research institutes.

Features and benefits

ensuring the right flow at all times - minimizing pumping energy by limiting the flow
wide selection of connections - available for external and internal thread connections
minimum hysteresis ensures precise temperature control

excellent resistance to scale and clogging
easy troubleshooting - valve settings are visible
measuring nipples for measuring flow
drives with remote communication and data control can be fitted

Valve settings

The valve can be adjusted manually using the rotary knob with the displayed scale. The setting is visible even after the drive is connected, as it is visible not only from above but also from the side. A scale from 1 to 10 indicates the percentage flow setting in values of 10 ... 100% of the flow. The valve also works with a stroke limiting function.

Flow measurement

AB-QM 4.0 are characterized by high accuracy of flow measurement. Optional test plugs with standard center-to-center distance.

Connection to choose from

The valve is now available in variants with internal or external thread. This product has an external thread. Threaded connection sizes range from DN 15 to DN 32.

Pressure and flow

Unlike older models, AB-QM 4.0 are designed for higher pressures PN 25/360 PSI. They also allow you to work with a greater range in flow control. Each new valve size also exists in three design flow variants. You can select the valve from low flow (LF), normal and high (HF).

The AB-QM system is operated in variable flow mode. The amount of water that is needed at a given time flows to the individual appliances. This makes the whole system more economical .

Control valve

The inside of the valve is made of brass DZR materials, the soft parts are made of PPSU polymer. This reduces the risk of limescale clogging and subsequent peeling, which could cause the valve to clog. The stroke of all valve sizes is now 4 mm for all.

Valve body

The entire valve body is made of DZR brass as 1 part. The new design allows two-way flushing and filling. This saves time before commissioning.

Thanks to the AB-QM valves, the assembly-completed system no longer has to be subsequently balanced , thus eliminating complicated step-by-step measurements and time-consuming adjustment corrections, as is the case with other valves.

Regulatory fun kce

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 of PPSU polymer.

Thanks to the integrated differential pressure regulator, the control valve still has 100% authority and therefore always ensures stable control. The compact design allows installation even in small spaces. For example, in fan-coil units.