Pressure Independent balancing Control Valves (PICV)

  • Overview
  • Product range
  • Documents
  • Tender texts
  • 3D models and drawings
  • Software
  • Related products
  • Case studies

Two- or four-pipe heating and/or cooling systems are characterized by changing conditions due to valves opening and closing depending on the need for heating or cooling. This continuously causes flow and differential pressure changes.

Without proper measurements, such systems suffer from uneven heat distribution, poor energy inefficiency and are very difficult to commission.

To avoid these issues Pressure Independent balancing and Control Valves (PICV) provide the best and simplest solution.

By adding an actuator, the valves function as flow-limited control valves, automatically balancing the system and providing the best possible indoor comfort and energy efficiency. The commissioning of the system is a lot easier, all valves only need to be set to the design flow before the actuators are mounted.

Danfoss offers a broad range of pressure-independent balancing and control valves and matching actuators.

Features and benefits

Stable room temperature

Eliminating the overflow situations at partial load conditions has a significant effect on the stability of the room temperature

Improved indoor comfort

With the stable room temperature, the indoor comfort increases. Required temperatures are accurately met, increasing the productivity of office employees or benefitting the experience of hotel guests.

Energy savings

The perfectly balanced system, under all conditions, increases the energy efficiency and leads to savings on energy costs.

Reduced maintenance costs

As the pressure-independent valves ensure perfect working conditions, the actuators mounted on them require fewer movements to keep the temperature stable. This increases the lifetime value of the actuators and reduces the maintenance costs.

AB-QM 4.0: We created PICVs - now we redefine the value

NEW: AB-QM 4.0

Get ready for the next level value of your PICV designs.

Product range

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    AB-QM Pressure Independent Control Valves (PICV) DN25 - DN250

    AB-QM Pressure Independent balancing and Control Valves (PICV) provide both a control functionality and dynamic balancing solution for HVAC heating and cooling systems. PICVs are designed for various types of terminal units, Air Handling Units (AHU), chillers and provide high indoor comfort and energy efficiency in public and commercial buildings.

Documents

Documents
Type Name Language Valid for Updated Download File type
Brochure Energy saving solutions for renovation of heating and cooling systems English Multiple 10 Sep, 2014 5.9 MB .pdf
Brochure Grow your business and discover the value of working with one partner (International version) English Multiple 19 Nov, 2015 5.6 MB .pdf
Application guide HVAC Application guide English Multiple 26 Oct, 2020 19.4 MB .pdf
Brochure Hydronic Balancing & Control product overview English United Kingdom 11 Nov, 2014 7.1 MB .pdf
Brochure Hydronic Balancing & Control product overview English Multiple 12 Dec, 2016 1.1 MB .pdf
Case story NovoCon - outstanding HVAC flexibility after office building renovation English Multiple 28 Sep, 2020 960.1 KB .pdf

Tender texts

The pressure independent balancing and control valve means that the control characteristic is independent from the available pressure. The precise flow control performance of the AB-QM 4.0 with a Danfoss actuator provides increased comfort and superior Total Cost of Ownership. The AB-QM 4.0 ensures and control the required flow on every terminal unit and maintains Hydronic balance in the system.

AB-QM 4.0 has following features:

Automatic flow limitation function
Modulating below 1% of set flow, regardless of the setting
Authority of 1 at all settings
Able to close against 16 bar of differential pressure
Polymer (PPSU) components of differential pressure controller and control valve cone
Linear control characteristic
Linear setting
Scale in percentage of flow
Minimum setting is 10%
Setting of flow percentage is visible with actuator mounted
Control ratio 1:1000
Pressure stage PN25
All inner brass parts from DZR (CW602N)
Available in the range from DN 15 – 32 for design flows from 20 – 6,000 l/h from one supplier
Available with external thread acc. ISO 228/1 and internal thread acc. ISO 7/1
Available with test plugs for pump optimization and flow measurements (dpcv)
Flow measurements accuracy according to BS7350:1990
Characteristic can be changed from linear to equal percentage characteristic at all sizes by adjusting actuator settings
Filling and flushing is possible in flow and counter-flow direction
Starting pressure of 16 kPa for DN 15 – DN 20 and 20 kPa for DN 25 – DN 32
Starting pressure of 32 kPa for DN 15 – DN 32 HF versions
Leakage rate of no visible leakage for DN 15 - DN 32 in combination with recommended actuator (IEC 60534-4:2007 Class IV)

The pressure independent balancing and control valve means that the control characteristic is independent from the available pressure. The precise flow control performance of the AB-QM with a Danfoss actuator provides increased comfort and superior Total Cost of Ownership. The AB-QM ensures and control the required flow on every terminal unit and maintains Hydronic balance in the system.

AB-QM has following features:

Flow limitation function
Modulating below 1% of set flow, regardless of the setting
Authority of 1 at all settings
Able to close against 16 bar of differential pressure
Linear control characteristic
Scale in percentage of flow
Control ratio 1:1000
Test plugs for pump optimization and flow verification for DN 10-250
Available in the range from DN 10 – 250 from one supplier.

Characteristic changed from linear to equal percentage characteristic at all sizes by adjusting actuator settings
Lockable setting
Starting pressure of 16 kPa for DN 10 – DN 20
Starting pressure of 20 kPa for DN 25 – DN 32
Starting pressure of 30 kPa for DN 40 – DN 250
Leakage rate of no visible leakage for DN 10 - DN 20 in combination with recommended actuator
Leakage of 0.05 % of the Qnom for DN 25 - DN 100 in combination with recommended actuator
Leakage of 0.01 % of the Qnom for DN 125 - DN 250 in combination with recommended actuator

3D models and drawings

Software

Danfoss set 365 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.

Related products

  • if (isSmallPicture) { Actuators for PIBCV- Danfoss } else if (isBigColumns) { Actuators for PIBCV- Danfoss } else { Actuators for PIBCV- Danfoss }
    Actuators for PIBCV

    To take advantage of the combined balancing and control features of Danfoss AB-QM it has to be equipped with actuators controlled by room thermostats or a Building Management System. Danfoss offers a broad range of actuators varying from Thermal on-off to Geared digital actuators with bus communication.

  • if (isSmallPicture) { NovoCon® S Digital Actuator- Danfoss } else if (isBigColumns) { NovoCon® S Digital Actuator- Danfoss } else { NovoCon® S Digital Actuator- Danfoss }
    NovoCon® S Digital Actuator

    With NovoCon® S Danfoss revolutionizes the way hydronic balancing and HVAC control work together. The first of its kind digital HVAC actuators are directly connected with a Building Management System (BMS). This enables System Integrators to design state-of-art, Internet of Things (IoT) solutions.

Case studies

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    Outstanding HVAC flexibility after high-end office building renovation

    Building: Office
    Application: Hydronic balancing and remote control of 4-pipe heating/cooling change-over system
    Challenge: Ensure a flexible to use HVAC system with DGNB sustainability certification
    Solution: Digital NovoCon actuator combined with AB-QM control valves and NovoCon CO6 combined with ChangeOver6 as a combination balance the system hydronically, allow remote access via a BMS and control the room temperatures during both heating and cooling operation.

  • if (isSmallPicture) { } else if (isBigColumns) { } else { }
    High-end climate solutions in Waldorf Astoria by Hilton, Amsterdam, the Netherlands

    Building: Hotel
    Application: Hydronic balancing and control for radiator heating and fan coil cooling
    Challenge: Establish top level comfort and minimum energy consumption for heating and cooling
    Solution: Fan-coil units for cooling; 8 heating risers and radiators equipped with Danfoss products.

  • if (isSmallPicture) { } else if (isBigColumns) { } else { }
    HVAC control at Katowice business centre, Poland

    Katowice Business Centre is a modern office building where Danfoss hydronic balancing solutions are used; AB-QM balancing and control valves in combination with revolutionary NovoCon® actuators.

  • if (isSmallPicture) { } else if (isBigColumns) { } else { }
    Energy comfort in Prime Tower, Zurich, Switzerland

    The Prime Tower in Zurich is a building of many records. With its 126 meters it is the tallest building in Switzerland with 36 floors and 40,000 square meters accommodating mostly offices. And with its more than 6,000 AB-QM valves it is also one of the biggest heating and cooling installations ever designed and installed by Danfoss.

  • if (isSmallPicture) { } else if (isBigColumns) { } else { }
    Hydronic balancing in SAMBA bank head office, Riyadh, UAE

    At the heart of the new King Abdullah Financial District in Riyadh stands the impressive SAMBA head office. The 40-storey building represents a landmark in sustainable architecture and engineering and forms an attractive work space for the 800 people working in the SAMBA Financial Group head office.

  • if (isSmallPicture) { } else if (isBigColumns) { } else { }
    Floreasca Park: Danfoss PIBCV solution offers the perfect balance in the greenest office building in Bucharest, Romania