Serving the HVAC industry since 1992
Call: (800) 435-2526Email SearchMenu
The flow regulator RDR is an element placed inside the duct in order to obtain a constant flow within a pressure range from 50 to 250 Pascals.

It is used in air conditioning or ventilation systems either in extraction or blowing mode.
Unit of Measure


Regulator Diameter

N/A 200 mm


N/A RDR Ø 100 + 3 cales

Flow Range

N/A 50 to 100 m³/h

Set Flow

N/A 100 m³/h

Maximum Temperature

N/A 60 ºC


N/A Galvanized Steel

Intermediary Step

N/A 10 m³/h

Component and Dimensions

Dimension D1

N/A 190 mm

Dimension D2

N/A 195 mm

Dimension L

N/A 91 mm


N/A Air Flow Setting Cale (According to the Air Flow) Piece of Regulation Regulator Casing Screw to Fix the Air Flow Sleave with Lip Seal



  • Self-adjusting on the pressure range 50 to 250 Pa
  • Easy adjustment
  • The requested air flow is fixed by a screwdriver
  • Made in plastic material (classified Ml) and in galvanized steel for sleeves in 160 to 250 mm
  • Use with a maximum temperature of 60 °C



N/A The self-adjusting flow regulator RDR can be adjusted on sites according to the requested air flow.

The marks on the sides of the opening indicate the settings.



N/A Before setting the regulator, it's necessary to calibrate the flow:
  • Unscrew of 1/4 tour with a screwdriver
  • Adjust the mark to the requested flow
  • Screw according to the air flow



N/A The flow regulators are simply fitted into vertical or horizontal ducts. On the horizontal duct, respect the mention «DOWN» indicated at the front of the product. A leap seal ensures the airtightness.

When the flow regulator is associated with a diffuser, the minimum distance between the diffuser and the regulator is at least one Ø in extraction mode and 3 Ø in blowing mode.

When installing, do not touch the piece of regulation.



N/A The flow regulator must remain accessible to permit its maintenance.



N/A The curves show the flow variations in m³/h of RDR Ø 150, 160 and 200 mm in extraction according to the difference in of pressure in Pascal (pressure range of 50 to 250 Pa). The values given are averages which may vary of 5 % either way. Flow regulators are characterized by their noise level dB(A).