EnglishCurrent
德语
阿拉伯语
法语
印尼语
日语
韩语
马来语
葡萄牙语
俄语
西班牙语
泰语
土耳其语
越南语
Cleanroom Air Distribution Systems
Variable Air Volume Control Damper
A sensor-equipped modulating damper that compares measured airflow with a remote setpoint and repositions opposed blades as demand changes.
- Closed-Loop Airflow Control
- Averaging Pressure Sensor
- Modulating Opposed Blades
- BMS Setpoint Interface
Product Introduction
The variable air volume control damper combines a rectangular galvanized casing, opposed control blades, an averaging differential-pressure sensor and a matched electronic controller-actuator assembly. Pressure measured at several points across the inlet is converted into an airflow signal and compared with the commanded setpoint. The actuator then moves the blade bank until the measured value returns to the required range. Replaceable edge seals and enclosed blade gears support low-leakage shut-off and keep the linkage outside the main airstream.
Key Features
Opposed airfoil blades provide progressive modulation across a broad minimum-to-maximum airflow range.
The controller can accept an analog or digital setpoint for temperature, occupancy or room-pressure sequences.
External electronics, shaft indication and replaceable seals simplify functional checks without removing the damper.
Customer Product Concerns
Accurate VAV control depends on a usable sensor signal, stable inlet conditions, correct actuator authority and a minimum airflow that protects the room process.
A single pressure pickup reports an incorrect flow value behind an elbow.An averaging sensor samples several locations and a straight inlet section reduces profile distortion.
The actuator hunts because the controller gain is too aggressive for the duct response.Matched actuator timing and tuned control parameters provide stable movement around the airflow setpoint.
Closing below the validated minimum airflow disrupts room pressure and dilution.Programmable minimum and maximum limits keep the commanded airflow inside the operating envelope.
Blade leakage prevents an unused branch from isolating during setback.Tip and jamb seals combined with opposed blades improve shut-off when the controller receives a close override.
Typical Applications
Cleanroom supply-air modulationLaboratory room exhaust controlPressure-cascade airflow trackingDemand-controlled pharmaceutical support roomsVariable-volume healthcare ventilation
Technical Parameters
Typical mechanical construction ranges for a rectangular electronic VAV control damper are listed below.
| Core Material | Galvanized-steel opposed control blades with TPE seals and aluminum averaging pressure sensor |
|---|---|
| Panel Thickness | 0.8–1.5 mm blade and casing components |
| Effective Width | 200–1000 mm nominal rectangular airway width |
| Maximum Length | Up to 1200 mm casing length with acoustic cladding or service section |
| Steel Facing Thickness | 0.8–1.0 mm galvanized external casing sheet |
| Core Density | Approximately 7850 kg/m³ for the galvanized steel blade bank |
| Thermal Conductivity | Approximately 45–55 W/(m·K) for the steel airflow components |
| Surface Finish | Galvanized casing with corrosion-protected gears, shaft and actuator bracket |
| Joint Type | Double-flanged casing with geared opposed blades, replaceable seals and external direct-coupled actuator |
| Customization | Available based on the intended application and operating environment. |
Available Options
Analog 0–10 V or digital network controlRoom-pressure or duct-pressure control programAcoustic casing and downstream attenuatorLow-leakage blade seals and spring-return actuator
Planning a Variable Air Volume Control Damper specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
