In several cases, rooms or zones in lab environments need to have over or under pressure relatively adjoining spaces to ensure the direction of air movement. There are a variety of system solutions depending on whether there are fixed or variable flows that need to be managed. There is usually also a requirement for safe passage between spaces with different pressure conditions. The illustration shows a case with constant flow in a space that must have negative pressure against a corridor or a path thru unit.

  • DCV-BL (Airflow controller FBL mounted on a damper with a measuring flange), commissioned for constant flow control.
  • Differential pressure controller DPL, regulates via damper with a damper motor, the extract air flow so that a constant negative pressure or overpressure is maintained.
  • A deviating differential pressure generates an acoustic and optical alarm on the user panel FLOCHECK P which is connected directly to the controller DPL.
  • Both controller FBL and DPL have a relay function for alarm outputs.
  • The connected user panel is used for reading actual values ​​and changing setpoints.

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