eFlow-MAX High Capacity Constant Airflow Regulator Low Flow


eFlow-MAX Low Flow is a field adjustable High Capacity Constant Airflow Regulator
This round damper is designed to provide automatic, precise, balanced pressure-independent maximum constant airflow in round duct systems without the use of electricity, sensors or controls.

Operating Pressure Range 0.2 to 2.0 in w.g. (50-500Pa)


Equal to American aldes mr max high capacity constant airflow regulator, Young regulaor constant volume damper cvdxx .


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Diameters offered: 3”, 4″, 5”, 8″, 10″,
Operating Pressure Range: 0.2 to 2.0 in w.g. (50-500Pa)
Airflow settings: 15-470 CFM
Temperature Limits: -22° to 212°F (-30° to 100°C)
Suitable for both supply and exhaust applications
No external power supply needed
Factory calibrated
Field Adjustable CFM setpoint
Capable of maintaining constant airflow within + 10% for nominal airflow > 60 CFM (100 m3/h) and + 5 CFM (10 m3/h) for nominal airflow < 60 CFM. (100 m3/h) throughout the target operating pressure range of 0.2 to 2.0 in. w.g. (50 to 500 Pa).
Optimum air velocity: 885 FPM (4.5 m/s) and it should not drop below 530 FPM (2.7 m/s)
Sound power levels shall not exceed those for each size and CFM rating as scheduled.
Laser-welded, heavy galvanized steel body, plastic airflow control and air tightness seal to ensure no-leak fit
Available in stainless steel
Energy efficient
Ideal solution for meeting rooms, classrooms, concert halls, etc.
Maintenance free and corrosion-proof under normal conditions

Energy Efficiency Programs
Subsidized Housing Projects
Government Facilities
Military facilities
High Rises
Commercial Buildings
Residential Buildings
Assisted Living Facilities
Dormitories and Schools Buildings
Office buildings
Balancing airflow supply from roof-top A/C units
Balancing supply and exhaust of heat recovery ventilation systems
Regulating outdoor air-supply into individual room fan coil units or heat pumps
Balancing airflow on series-fan-powered terminal unit system


Guaranteed for 6 years, from date of shipment, against all defects in material, provided material has been installed and used under normal conditions.


Additional information

Weight 8 lbs
Dimensions 8 × 8 × 8 in

eFlow-MAX LF 3” Airflow Range 15-47 CFM, eFlow-MAX LF 4” Airflow Range 24-74 CFM, eFlow-MAX LF 5” Airflow Range 38-130 CFM, eFlow-MAX LF 8” Airflow Range 95-295 CFM, eFlow-MAX LF 10” Airflow Range 141-800 CFM