Danfoss ASV automatic balancing valves provide a simple, reliable and cost-effective way to create hydronic balance in two-pipe heating or cooling systems. They solve the technical issue of pressure fluctuations: the root cause of system imbalances and problems such as uneven heat distribution, noise and high energy consumption. ASV consists from two components; a return-pipe mounted differential pressure controller ASV-P or ASV-PV and flow-pipe mounted partner valve ASV-BD, ASV-I or ASV-M. An impulse tube connects both valves so the differential pressure over the riser can be controlled. In combination with Danfoss RA-N or RA-UN pre-setting valves on the radiators a perfectly balanced system, in both full and partial load conditions, is achieved.

The 4th generation of ASV-PV offers many unique product innovations. It is designed based on the needs from installers, designers and consultants with a focus on time saving during installation and commissioning of the system.

Features and benefits

Visible setting scale

Simple adjustment of the differential pressure setting, no special equipment is required. The clearly visible setting scale makes it easy to determine if the setting is adjusted correctly. The setting ring can be locked to prevent unauthorized adjustments.

Short build in height

The installation dimensions are decreased for flexible and convenient installation.

Faster and better flushing

Increase the reliability of the system by flushing it and remove before putting the system into operation. To flush and fill a system faster, the ASV-PV valve can temporarily be locked in an open position by a flushing ring accessory.

Integrated membrane

The valve body and pressure membrane are combined into one component. This design ensures optimal low flow performance and extremely ideal differential pressure sensitivity for each individual DN size valve.

Features and functionalities of Danfoss ASV-PV

A series of 5 animations describing the challenges, backgrounds and solutions for hydronic balancing of two-pipe heating systems in multi-family buildings.

Documents

Type Name Language Valid for Updated Download File type
Brochure ASV automatic balancing valves Drive energy efficiency and increase customer satisfaction Hungarian Hungary 02 May, 2019 1.1 MB .pdf
Brochure ASV automatic balancing valves Drive energy efficiency and increase customer satisfaction Swedish Sweden 02 May, 2019 1.1 MB .pdf
Brochure ASV automatic balancing valves Drive energy efficiency and increase customer satisfaction English Multiple 02 May, 2019 325.8 KB .pdf
Brochure ASV automatic balancing valves Drive energy efficiency and increase customer satisfaction German Multiple 02 May, 2019 378.7 KB .pdf
Brochure ASV automatic balancing valves Smart heating optimization increases your building's lifetime value English Multiple 14 Jul, 2019 691.1 KB .pdf
Brochure Energy saving solutions for renovation of heating and cooling systems Romanian, Moldavian, Moldovan Romania 14 Jul, 2019 6.3 MB .pdf
Brochure Energy saving solutions for renovation of heating and cooling systems Hungarian Hungary 02 May, 2019 6.3 MB .pdf
Brochure Energy saving solutions for renovation of heating and cooling systems English Multiple 02 May, 2019 5.8 MB .pdf
Brochure Energy saving solutions for renovation of heating and cooling systems Polish Multiple 02 May, 2019 5.8 MB .pdf
Brochure Geen comfort- en geluidsklachten dankzij slimme aanpak blokverwarming Dutch, Flemish Netherlands 02 May, 2019 603.3 KB .pdf
Application guide HVAC Application guide Romanian, Moldavian, Moldovan Romania 02 May, 2019 7.2 MB .pdf
Application guide HVAC Application guide Hungarian Hungary 02 May, 2019 7.7 MB .pdf
Application guide HVAC Application guide English Multiple 02 May, 2019 7.5 MB .pdf
Application guide HVAC Application guide Czech Czech Republic 02 May, 2019 7.2 MB .pdf
Application guide HVAC Application guide Polish Multiple 20 May, 2019 9.8 MB .pdf
Brochure Hydronic Balancing & Control product overview English United Kingdom 02 May, 2019 7.1 MB .pdf
Brochure Hydronic Balancing & Control product overview English Multiple 02 May, 2019 1.1 MB .pdf
Brochure Hydronic Balancing & Control product overview Czech Czech Republic 02 May, 2019 1.0 MB .pdf
Brochure Hydronic Balancing & Control product overview German Multiple 02 May, 2019 1.1 MB .pdf
Brochure Intelligente Heizungsoptimierung dient dem Werterhalt Ihrer Gebäude German Germany 02 May, 2019 712.2 KB .pdf
Brochure Optimal 2 tool Finnish Multiple 02 May, 2019 2.5 MB .pdf
Brochure Optimal 2 tool Danish Multiple 02 May, 2019 2.4 MB .pdf
Brochure Optimal 2 tool English Multiple 02 May, 2019 2.5 MB .pdf
White paper Practical guidelines for creating energy efficient multi-family residential heating systems English Multiple 14 Jul, 2019 4.3 MB .pdf
Brochure Smart heating optimization increases your building's lifetime value English Multiple 14 Jul, 2019 713.2 KB .pdf
Brochure Smart heating optimization increases your building's lifetime value Swedish Sweden 14 Jul, 2019 706.9 KB .pdf
Brochure Two-pipe solutions: upgrade your two-pipe system with our Renovation+ Solution Hungarian Hungary 02 May, 2019 733.0 KB .pdf
Brochure Two-pipe solutions: upgrade your two-pipe system with our Renovation+ Solution Estonian Estonia 02 May, 2019 1.0 MB .pdf
Brochure Two-pipe solutions: upgrade your two-pipe system with our Renovation+ Solution Dutch, Flemish Netherlands 02 May, 2019 635.9 KB .pdf
Brochure Two-pipe solutions: upgrade your two-pipe system with our Renovation+ Solution Hungarian Hungary 02 May, 2019 1.5 MB .pdf
Brochure Two-pipe solutions: upgrade your two-pipe system with our Renovation+ Solution English Multiple 02 May, 2019 1.1 MB .pdf
Brochure Two-pipe solutions: upgrade your two-pipe system with our Renovation+ Solution German Switzerland 02 May, 2019 733.7 KB .pdf
Brochure Two-pipe solutions: upgrade your two-pipe system with our Renovation+ Solution German Multiple 02 May, 2019 1.4 MB .pdf
Brochure Two-pipe solutions: upgrade your two-pipe system with our Renovation+ Solution German Austria 02 May, 2019 995.2 KB .PDF
Brochure Two-pipe solutions: upgrade your two-pipe system with our Renovation+ Solution Finnish Finland 02 May, 2019 990.9 KB .pdf

Tender texts

ASV-PV (4th gen.) – Differential pressure controller/Automatic balancing valve DN 15-50

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

  • Valve should keep stable differential pressure across the branch by membrane driven controller
  • Valve should have variable Differential pressure setting.
  • Minimum needed differential pressure over the valve should not be higher than 10 kPa, independently from Dp setting
  • Valve should have metal to metal (valve cone and seat) sealing to ensure optimal performance of differential pressure control at low flows
  • Differential pressure setting should be linear via visual scale and without tool, locking function should be integrated to prevent unauthorized change of setting
  • The setting range should be adaptable via spring replacement. Spring should be exchangeable under pressure
  • Valve should provide differential pressure setting range fit to application to ensure optimal system performance (such as 5-25 kPa setting range for radiator based systems)
  • Valve capacity per valve size should cover flow range according to VDI 2073 Standards (with water velocity of up 0.8 m/s)
  • Valve should have shut-off function separated from the setting mechanism. Shut-off service function should be possible to do by hand / without tool
  • Drain function should be integrated in valve
  • Valves should have integrated flushing service function. Flushing can be done with flushing accessory
  • Valve should be delivered with impulse tube. Inner diameter of impulse tube should not be bigger than 1.2 mm to ensure optimal performance within the system
  • Valve should be delivered with thermal insulation caps, up to 120°C
  • Valve should be delivered in reliable packaging for safe transport and handling

Product characteristics:

  • Pressure class: PN 16
  • Temperature range: 0 … +120 °C
  • Connection size: DN 15-50
  • Connection type: Internal thread ISO 7/1 (DN 15-50), External thread ISO 228/1 (DN 15-50)
  • Δp setting range: 5-25 kPa, 20-60 kPa 
  • Max differential pressure across valve:1.5 bar
  • Installation: differential pressure controller should be mounted on return pipe with connection via impulse tube to supply pipe.
ASV-PV (3rd gen.) – Differential pressure controller/Automatic balancing valve

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

  • Valve should keep stable differential pressure across the branch by membrane driven controller
  • Valve should have variable Dp setting. Setting should be hidden or lockable to prevent unauthorized changes
  • Setting accuracy should be within ±10% of set differential pressure, proven by independent accredited third party
  • Minimum needed differential pressure over the valve should not be higher than 10 kPa, independently from Dp setting
  • Valve should have metal to metal (valve cone and seat) sealing to ensure optimal performance of differential pressure control at low flows
  • Differential pressure setting should be linear throughout the setting range (1 turn 1 kPa or 1 turn 2 kPa depending on dimension)
  • The setting range should be adaptable via spring replacement in dimensions DN 15-40. Spring should be exchangeable under pressure
  • Valve should provide Dp setting range fit to application to ensure optimal system performance (such as 5-25 kPa setting range for radiator based systems)
  • Valve capacity per valve size should cover flow range according to VDI 2073 Standards (with water velocity of up 0.8 m/s)
  • Valve should have shut-off function separated from the setting mechanism. Shut-off service function should be possible to do by hand / without tool
  • Drain function should be integrated in valve in dimension range of DN 15-50
  • Valve should be delivered with impulse tube. Inner diameter of impulse tube should not be bigger than 1.2 mm to ensure optimal performance within the system
  • Valve in DN 15-40 range should be delivered with thermal insulation caps, min. 80°C
  • Valve should be delivered in reliable packaging for safe transport and handling

Product characteristics:

  • Pressure class: PN 16 
  • Temperature range: -10 … +120°C 
  • Valve size: DN 15-100 
  • Installation: on return pipe with connection via impulse tube to supply pipe 

DN 15-25:

  • Connection type: Internal thread ISO 7/1 and External thread ISO 228/1 
  • Dp setting range: 5-25 kPa, 20-60 kPa 
  • Max Dp: 1.5 bar 

DN 32-40:

  • Connection type: Internal thread ISO 7/1 and External thread ISO 228/1 
  • Dp setting range: 5-25 kPa, 20-60 kPa, 35-75 kPa 
  • Max Dp: 1.5 bar 

DN 50:

  • Connection type: External thread ISO 228/1 
  • Dp setting range: 5-25 kPa, 20-40 kPa, 35-75 kPa, 60-100 kPa 
  • Max Dp: 2.5 bar 

DN 65-100:

  • Connection type: Flange EN 1092-2 
  • Dp setting range: 20-40 kPa, 35-75 kPa, 60-100 kPa 
  • Max Dp: 2.5 bar 

Software

Danfoss C.H. software

Danfoss C.H. software

Our advanced Danfoss C.H. software will help you to design and calculate the perfect heating or cooling installation with Danfoss products.

Tools and apps

Learning

Case studies

  • New heating system with ASV automatic balancing valves in apartment building, Tallinn, Estonia

    Too warm, too cold, and no chance to regulate the heating inside the individual apartment – those were the issues facing the residents in a 9-storey apartment building in Tallinn, Estonia. By upgrading the existing one-pipe system into a two-pipe system with automatic hydronic balancing, the residents now enjoy improved comfort and 25 percent savings on the energy bill.

  • Hydronic balancing with ASV in residential building, Milan, Italy

    Some years ago, the radiators in five 9-storey apartment buildings in Milan, Italy were equipped with thermostatic radiator valves. Not until the system was fitted with automatic balancing valves, however, did the benefits of the new TRVs materialize in terms of 14 percent energy savings, less noise from the heating system and improved indoor comfort for the residents.

  • Hydronic balancing for a housing association, Mjolby, Sweden

    Energy efficiency and indoor comfort are top of mind among building owners today. Also in Sweden, where the housing association “Bostadsbolaget AB” in Mjölby took action when they were confronted with a rising energy bill due to insufficient heat distribution in a 10-storey residential building.

  • ASV automatic balancing valves in buildings in 4 streets, Jonkoping, Sweden

    During the past few years a huge demand for sustainable living has emerged. The pressure on creating environmental friendly or green buildings is higher than ever. Also for existing buildings the need for not leaving a big blueprint on the globe is becoming increasingly important. In Jönköping, Sweden, the community living in the Västerkåkar neighborhood is going forward. In 2013 substantial changes to the communal heating system in the buildings in four streets showed that a green example can be set, in just a couple of steps.

  • Balancing valves in Sky Tower, Wroclaw, Poland

    The tallest building of the EU now resides in Wroclaw in Poland. As a beautiful landmark to modern architecture, high user comfort and sustainable practice, the 212 meter high Sky Tower forms the pleasant setting for thousands of people living and working in the building.

  • Renovation of one-pipe system in 6 building system, Poland

    A building co-operative in Szczecin, Poland, has reduced the energy consumption in their one-pipe heating system by 18 percent with a solution five times cheaper than a conversion to a two-pipe system.