Skip to main content
Danfoss

AB-PM differential pressure control valves

Product store
Danfoss differential pressure control valve AB-PM

Danfoss AB-PM combined dynamic balancing valves ensure 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 dynamic 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 connection sets

For residential applications, the Danfoss AB-PM connections sets are a compact and time saving solution for installing in front of each flat or manifold in hydronic heating systems. It is the best answer for a reliable system with proper distribution of flow and differential pressure both at full load and partial load conditions. Using the AB-PM connection sets, the installation is prepared for fast and easy heat meter installation just by removing the replacement piece. The dedicated design of the sets with ball valves for easy shutoff enables safe commissioning, servicing and maintenance of the manifold heating system.

Floor heating animation

See the animation demonstrating the use of AB-PM in a hydronic floor heating system.

Animated instructions for small DN sizes

Watch animated instructions to see how to install AB-PM.

Software

Danfoss SET 365 software

Our advanced Danfoss SET 365 3D design software will help you to design and calculate HVAC systems with Danfoss products. A 1-year subscription is FREE available for students, designers and other interested professionals.

Danfoss SET 365 software
Danfoss set 365 software

Documents

Documents
Type Name Language Updated Download File type

Related products

3D models and drawings

BIM library for MEP designs

Get your 3D BIM objects and start design dynamic HVAC solutions.

Read more and Download

Articles

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 sufficient 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)
Need design support?

We offer expert hydronic HVAC design and consultancy services at Danfoss' Design Support Center.

Read more