Volume Flow Controller

  • For constant and variable volume flows
  • Installation in any position
  • Bus-capable controller
  • Option: Prepared for on-site insulation
  • Short duct length
  • Actuators with special function: high speed, spring return
  • Dynamic or static differential pressure sensor
  • Different arrangements of the control components for a wide variety of installation and insulation options

Product Info

VRpro volume flow controllers are designed for constant and variable volume flows in ventilation systems. They can be installed and operated in any mounting position in ventilation ducts for supply and exhaust air. Casing and control mechanism are made of galvanised sheet steel. The damper blade for volume flow regulation is mounted centrally and fitted with a circumferential seal. The bearing axles are made of stainless steel and are guided in special bearing bushes. The measuring cross is made of aluminium. The control components consist of static or dynamic sensors, actuators with standard, high speed or spring return and of a controller. Sensor and controller are mounted on mounting consoles that can be manually folded or offset when space is limited. The VRpro volume flow controller is controlled and electrically connected either analogue or via MP-Bus®. All control components enable the operating modes "Constant", "Variable 0 - 10 V, 2 - 10 V, adjustable" and "3-step". Override controls, parallel operation and sequential circuits are possible. The volume flow controllers enable high accuracy with only about ± 5 % to ± 20 % deviation from the actual volume flow.


  • lip seals on both sides
  • prepared for on-site insulation
  • acoustic insulation with sheet metal jacket, factory-mounted
  • SRC duct silencer, lengths 600 mm and 900 mm

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