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أنظمة توزيع الهواء في الغرف النظيفة
Variable الهواء حجم التحكم المثبط صمام التحكم في تدفق الهواء
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
مقدمة المنتج
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.
الخصائص الرئيسية
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.
مخاوف المنتج للعملاء
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.
تطبيقات نموذجية
Cleanroom supply-air modulationLaboratory room exhaust controlPressure-cascade airflow trackingDemand-controlled pharmaceutical support roomsVariable-volume healthcare ventilation
المعلمات الفنية
Typical mechanical construction ranges for a rectangular electronic VAV control damper are listed below.
| المواد الأساسية | Galvanized-steel opposed control blades with TPE seals and aluminum averaging pressure sensor |
|---|---|
| سمك اللوحة | 0.8–1.5 mm blade and casing components |
| العرض الفعال | 200–1000 mm nominal rectangular airway width |
| الحد الأقصى الطول | Up to 1200 mm casing length with acoustic cladding or service section |
| الصلب يواجه سمك | 0.8–1.0 mm galvanized external casing sheet |
| الكثافة الأساسية | Approximately 7850 kg/m³ for the galvanized steel blade bank |
| الموصلية الحرارية | Approximately 45–55 W/(m·K) for the steel airflow components |
| إنهاء السطح | Galvanized casing with corrosion-protected gears, shaft and actuator bracket |
| نوع المشترك | Double-flanged casing with geared opposed blades, replaceable seals and external direct-coupled actuator |
| التخصيص | متوفر على أساس التطبيق المقصود وبيئة التشغيل. |
الخيارات المتاحة
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?
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