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