AB-PM Automatic balancing valves

Danfoss Automatic balancing valve AB-PM

Danfoss AB-PM combined automatic balancing valves ensures a reliable HVAC system with low total cost of ownership. The valve secures perfect balance at all loads by guaranteeing stable flow and differential pressure for each zone. At the same time an actuator can be added to allow individual control of each zone. This provides an exceptional solution in two main applications:

Residential buildings (Multi Family Housing) with two-pipe heating systems with distribution systems in front of each flat, such as manifolds for hydronic floor heating
Commercial buildings (Shell & Core) where the HVAC systems are established in stages or by different parties.

In case of residential applications, the AB-PM is mostly used in sizes DN10-32, ensuring hydronic balance for each flat e.g. in front of manifold for floor heating installations. The optional connection to a room temperature controller allow feature for each flat such as night setback or holiday mode.

In case of commercial HVAC applications, the AB-PM is mostly used in sizes DN 40-100. The automatic balancing valve can be used in shell & core buildings such as shopping malls or offices, ensuring a reliable heating system for the building owner and tenants. AB-PM is the ideal solution for such type of buildings as staged installation, handover and commissioning often occur. In such cases, the 1st stage is installation of backbone piping without terminal units (responsible building owner). The 2nd stage is the installation of terminal units in each zone (responsible tenant).

The AB-PM ensure the required flow for each zone and maintains the hydronic balance in the system in all conditions and for individual zones either with one or more terminal units.

Danfoss AB-PM in residential building with actuator

Features and benefits

Many features in one compact valve
Combined balancing valve for differential pressure control, flow limitation and zone control
Guarantees flow and Δp for each zone
Easy, fast and simple design process
Fast installation and easy setting

AB-PM animated instructions for small DN sizes

Watch animated instructions to see how to install AB-PM

Tender texts

AB-PM (DN10-32) – Combined Automatic Balancing Valve

Branch should be balanced with a differential pressure controller for dynamic hydronic balance, with following characteristics:

Valve should keep differential pressure across the branch by membrane driven controller.
Valve should have shut-off function.
Valve should have possibility to mount actuator.
Valve should have variable setting. Setting value should allow to set a combination of needed Dp and max flow limitation.
Setting should be lockable to prevent unauthorized change.
Valve should have metal to metal sealing to ensure sufficient performance of differential pressure control at low flows.
Shut-off service function should be possible to do by hand / without a tool.
Valve should be delivered with impulse tube. Diameter of impulse tube should not be bigger than 1.2 mm.
Valve should be delivered in reliable packaging for safe transport and handling.

Product characteristics:

Pressure class: PN 16
Temperature range: −10 … +120 °C.
Connection size: DN10-DN32
Connection type: External thread ISO 228/1
Valve body material: DZR brass
Installation: on flow pipe with connection via impulse tube to return pipe.

DN10-32:

Dp setting range: 5-15 kPa
Nom flow at 10 kPa: 110 l/h (DN10), 300 l/h (DN15), 600 l/h (DN20), 1200 l/h (DN25) and 2300 l/h (DN32)
Minimum Dp across valve and loop 18 kPa to ensure proper control
Max Dp at zero flow: 22 kPa
Max Dp across the valve: 4 bar

DN10-32 HP:

Dp setting range: 10-25 kPa
Nom flow at 20 kPa: 110 l/h (DN10), 300 l/h (DN15), 600 l/h (DN20), 1200 l/h (DN25) and 2300 l/h (DN32)
Minimum Dp across valve and loop 28 kPa to ensure proper control
Max Dp at zero flow: 35 kPa
Max Dp across the valve: 4 bar

AB-PM (DN40-100) - Combined Automatic Balancing Valve

AB-PM DN 40-100 is a combined differential pressure controller for dynamic hydronic balance.

The valve should be able to ensure hydronic balance for each zone with one or more terminal units.
Valve shall have flexible functionality as either DPCV or PIBCV.
The valve can be connected to either flow or return pipe via impulse tube
With impulse tube connected to flow, the valve should keep differential pressure across the branch by membrane driven controller.
With impulse tube connected to the return, the valve should control the flow on every terminal unit
Valve should have shut-off function.
Valve should have possibility to mount actuator.
Valve should have variable setting.
Setting value should allow to set a combination of needed differential pressure and flow for zone.
Setting should be lockable to prevent unauthorized change.
Control valve should have metal to metal sealing to ensure sufficient performance of differential pressure control at low flows.
Shut-off service function should be possible to do with hand or a tool. The Dp controller should have soft sealing to ensure suficient closing in case of zero flow
Valve should be delivered with min. 2.5 m impulse tube. Diameter of impulse tube should not be bigger than 1.2 mm.
Valve should be delivered in reliable packaging for safe transport and handling.

Product characteristics:

Pressure class: PN16
Max. pressure drop across AB-PM: 4 bar
Temperature range: –10 … 120 °C
Connections size: DN 40-100
Connection type: External tread ISO 228/1 (DN 40, DN50), Flange EN1092-2 (DN 65-100)
Installation: in return pipe with connection via impulse tube to flow or return pipe
Setting range: Flow: 40-100%, Δp setting : 0-20 turns (DN40, DN50), 0-40 turns (DN65-DN100)
Nom. flow at factory setting (Δpr 25 kPa): 5000l/h (DN40), 6500 l/h (DN50), 16800 l/h (DN65), 19600 (DN80), 21000 (DN100)
Minimum differential pressure across valve and zone 42 kPa (DN40, DN50), 60 kPa (DN65-100)

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