Pressure independent control valves

Product types shown: 10

AFQM / AFQM 6
AFQM 6 is a self-acting flow controller with integrated control valve with full authority, primarily for use in district heating systems. The controller closes when set max. flow is exceeded. In combination with Danfoss electrical actuators AMV(E) can be controlled by ECL electronic controllers. The AFQM 6 is pressure independent which means that the control characteristic is independent from the available pressure and is not influenced by a low authority. The controller has a control valve with adjustable flow restrictor, connection neck for electrical actuator and an actuator with one control diaphragm. Control valve AFQM 6 DN40-50 is not pressure relieved.
AFQM 2
AFQM 2 is a self-acting flow controller with integrated control valve developed for the use in district heating / cooling systems. The controller prevents flow to exceed set max flow. In a combination with electrical actuators AMV(E) and ECL electronic controllers the flow and temperature can be controlled to achieve highest energy savings.

AFQM 2 has a control valve with adjustable flow limiter, connection neck for electrical actuator and a pressure actuator with one control diaphragm. Controllers are used together with Danfoss electrical actuators:
- AFQM 2 DN 65-250
- AMV(E) 655 without spring return function and with manual operation;
- AMV(E) 658 SD²⁾ spring return function and manual operation;
- AMV(E) 659 SD¹⁾ spring return function;
- AMV(E) 55
- AFQM 2 DN 65-125
- AMV(E) 56
¹⁾ DIN approved (according to EN 14597)
²⁾ not DIN approved

Main data:
- DN 65-250
- k_VS 60-800 m³/h
- Flow range 3.0-500 m³/h
- PN 16, 25, 40
- Differential pressure over the flow control cone Δp_MCV:
0.2 bar (standard version) or
0.5 bar (high flow version)
- Temperature:
- Circulation water / glycolic water up to 30 %: 2 … 150 °C
- Connections: Flange
AFQMP 2
AFQMP 2 is a self-acting flow controller with integrated control valve and with pressure actuator with adjustable spring, developed for the use in district heating / cooling systems. The controller prevents flow to exceed set max flow. Pressure actuator with adjustable spring enables adjustment of differential pressure over the control cone from 0.1 to 1 bar. Increased flows can be provided. In a combination with electrical actuators AMV(E) and ECL electronic controllers the flow and temperature can be controlled to achieve highest energy savings.

AFQMP 2 has a control valve with adjustable flow limiter, connection neck for electrical actuator and a pressure actuator with one control diaphrag.

Controllers are used together with Danfoss electrical actuators:
- AFQMP 2 PN 16/25/40 DN 65-250
- AMV(E) 655 without spring return function and with manual operation;
- AMV(E) 658 SD ²⁾ spring return function and manual operation;
- AMV(E) 659 SD ¹⁾ spring return function;
- AMV(E) 55
- AFQMP 2 PN 16/25/40 DN 65-125
- AMV(E) 56
¹⁾DIN approved (according to EN 14597)
²⁾ not DIN approved

Together with Danfoss intelligent electrical actuator AMEi 6 intelligent optimization functions are available:
∙ iSET-intelligent substation efficiency optimization
∙ iNET-intelligent pump optimization

Main data:
- DN 65-250
- k_VS 60-800 m³/h
- Flow range 4.2-630 m³/h
- PN 16, 25, 40
- Differential pressure over the flow control cone Δp_CV:
0.1-1 bar (adjustable by the spring)
- Temperature:
- Circulation water / glycolic water up to 30 %: 2 … 150°C
- Connections: Flange
- AFQMP 2 combined with AMV(E) 659 SD have been DIN approved according to EN 14597.
AHQM (DN 15-100)
AHQM is a self-acting flow controller with integrated control valve primarily for use in district heating systems or in secondary district heating systems as well. The controller closes when set max. flow is exceeded. In combination with Danfoss electrical actuators AMV(E) can be controlled by ECL electronic controllers. The controllers have a control valve with adjustable flow restrictor, connection neck for electrical actuator, and an actuator with one control diaphragm.
AVQM (PN 16)
AVQM is a self-acting flow controller with integrated control valve developed for the use in district heating / cooling systems. The controller prevents flow to exceed set max flow. In a combination with electrical actuators AMV(E) and ECL electronic controllers the flow and temperature can be controlled to achieve highest energy savings. AVQM has a control valve with adjustable flow limiter, connection neck for electrical actuator and a pressure actuator with one control diaphragm.
AVQM (PN 25)
AVQM is a self-acting flow controller with integrated control valve developed for the use in district heating / cooling systems. The controller prevents flow to exceed set max flow. In a combination with electrical actuators AMV(E) and ECL electronic controllers the flow and temperature can be controlled to achieve highest energy savings.

AVQM has a control valve with adjustable flow limiter, connection neck for electrical actuator and a pressure actuator with one control diaphragm.

Controllers are used together with Danfoss electrical actuators:
- AMV 150¹⁾
- AMV(E) 10¹⁾ / AMV(E) 20 / AMV(E) 30
- AMV(E) 13¹⁾ / AMV(E) 23 / AMV(E) 33 with spring return function
- AMV(E) 23 SU (spring up)
- AMV 20 SL / AMV 23 SL / AMV 30 SL with stroke limitation
¹⁾ AMV 150 / AMV(E) 10 / AMV(E) 13 can be combined with DN 15 controller only.

AVQM combined with AMV(E) 13, AMV(E) 23 (SL) or AMV(E) 33 (SL) has been approved according to DIN EN 14597.

Main data:
- DN 15-50
- k_VS 0.4-25 m³/h
- Flow range: 0.015-14 m³/h
- PN 25
- Differential pressure over control valve Δp_MCV: 0.2 bar
- Temperature:
- Circulation water / glycolic water up to 30 %: 2 ... 150 °C
- Connections:
- Ext. thread (weld-on, thread and flangetailpieces)
- Flange
AVQM-WE, AVQMT-WE
AVQM-WE is a self-acting flow controller with integrated control valve primarily for use in district heating systems. The controller closes when set max. flow is exceeded. AVQMT-WE is a self-acting flow and temperature controller with integrated control valve primarily for use in district heating systems. The controller closes on rising temperature or when set max. flow is exceeded. All controllers have special designed (pressure relieved) control valve insert.
AVQML (PN25)
AVQML is a self-acting flow controller with integrated control valve primarily for use in district heating systems or in secondary district heating systems as well. The controller closes when set max. flow is exceeded.
In combination with Danfoss electrical actuators AMV(E) can be controlled by ECL electronic controllers.

AVQML has a control valve with adjustable flow restrictor, connection neck for electrical actuator, and an actuator with one control diaphragm.

Controllers are used together with Danfoss electrical actuators or with self-acting thermostat:
- AMV 150
- AMV(E) 10
- AMV(E) 13 with spring return function
- AMV(E) 130 (H)*
- AMV(E) 140 (H)*
- QTL thermostat
Main data:
- DN 15-20
- Nominal Flow range: 0.8-1.9 m3/h*
PN 25
- Temperature:
- Circulation water / glycolic water up to 30%: 2 … 110 °C
- Connections:
- Ext. thread
* different nominal flow applies for AMV(E) 130(H)/140(H) for details refer to the table Technical data, under the chapter General data
Intelligent electrical actuator AMEi 6 iNET
AMEi 6 iNET actuator for intelligent network balancing, enables remote adjustment of differential pressure (Δp) setting on AFA 2, AFD 2, AFP 2, AFPA 2, AFPB 2, AFPQ 2 and AFQMP 2 controllers, used in District Heating/ Cooling systems. Changing heat consumption requires changes in heat distribution. Therefore the Δp should be optimised at each branch. With iNET the Δp can be remotely adjusted. Input for pump optimization. AMEi 6 iSET actuator for intelligent optimization of the District Heating/Cooling substation operation. Automatic adjustment of ∆p setting on AFP 2, AFPB 2, AFPQ 2 and AFQMP 2 controllers, used in DHC systems. Solution for dynamic DH systems with wide span of min - max flow (Domestic Hot Water service) and for systems with improperly sized control equipment (oversized control valves, wrong valve selection/characteristic, poor control ratio...)
Intelligent electrical actuator AMEi 6 iSET
AMEi 6 iNET actuator for intelligent network balancing, enables remote adjustment of differential pressure (Δp) setting on AFA 2, AFD 2, AFP 2, AFPA 2, AFPB 2, AFPQ 2 and AFQMP 2 controllers, used in District Heating/ Cooling systems. Changing heat consumption requires changes in heat distribution. Therefore the Δp should be optimised at each branch. With iNET the Δp can be remotely adjusted. Input for pump optimization. AMEi 6 iSET actuator for intelligent optimization of the District Heating/Cooling substation operation. Automatic adjustment of ∆p setting on AFP 2, AFPB 2, AFPQ 2 and AFQMP 2 controllers, used in DHC systems. Solution for dynamic DH systems with wide span of min - max flow (Domestic Hot Water service) and for systems with improperly sized control equipment (oversized control valves, wrong valve selection/characteristic, poor control ratio...)