Measurement and control

simple system monitoring

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Measurement and control

The measurement of actual values is extremely important for the efficient operation of ventilation systems. For this task, HLU has special components that can be used in chemically aggressive exhaust air.
The measured values are used for simple system monitoring or as input signals for a higher-level control system that controls the actuators in the system in question.
variable-volume-flow-controller-with-auxiliary-power

Variable volume flow controller with auxiliary power

HF – VRR

Application
  • used to keep air flows constant under changing pressure conditions
  • full shut-off possible due to integrated tight-closing shut-off damper
Features
  • volume flow from 50 to 4500 m³/h
  • minimum pressure difference 100 Pa at nominal volume flow
  • available in 12 nominal diameters from 110 to 400 mm connection diameter
volumetric-flow-regulator-without-auxiliary-power-

Volumetric flow regulator without auxiliary power

HF – VRM

Application
  • used to keep air flows constant under changing pressure conditions
Features
  • volume flow from 75 to 3200 m³/h
  • minimum pressure difference 100 Pa at nominal volume flow
  • available in the nominal diameters from 110 to 315 mm connection diameter
volumetric-flow-monitoring

Volumetric flow monitoring

HF – VRR measuring nozzle

Application
  • used to measure air flows
Features
  • volume flow from 50 to 4500 m³/h
  • available in the nominal diameters from 110 to 400 mm connection diameter
airstream-monitoring-

Airstream monitoring

HF – ASM-MU

Application
  • used to monitor airflows
Features
  • available in the nominal diameters from 75 to 400 mm connection diameter