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Airtight إغلاق المثبط
An aluminum multileaf damper with closed-cell edge seals and enclosed gears for extremely low-leakage isolation of rectangular ducts or wall openings.
- Extremely Low-Leakage Closure
- Sealed Aluminum Airfoil Blades
- Closed-Cell Jamb Seals
- Enclosed Synchronized Gears
مقدمة المنتج
The airtight shut-off damper is built from extruded aluminum casing sections and opposed hollow airfoil blades. Replaceable tip seals meet at each blade edge, while closed-cell side seals close the gaps at the jambs. Enclosed gears rotate every blade together and remain protected from the primary airflow. The rigid rectangular frame can be fitted into a duct, wall opening or ceiling slab opening and operated manually, pneumatically or by an electric actuator.
الخصائص الرئيسية
Closed-cell jamb seals compress at the blade ends without exposing fibrous material to the air path.
Encased gears maintain blade timing and protect the synchronization mechanism from dirt and contact.
Extruded aluminum construction provides a smooth corrosion-resistant surface for hygiene-sensitive ventilation.
مخاوف المنتج للعملاء
Low-leakage isolation depends on even frame geometry, continuous seal compression and enough closing torque to overcome pressure and seal friction.
Frame distortion during duct installation prevents the outer blades from reaching their seals.A rigid installation subframe and square fixing pattern preserve jamb spacing and blade alignment.
Side gaps dominate leakage even when the blade tips appear fully closed.Continuous closed-cell jamb seals close the blade-end clearance along both sides of the frame.
Exposed linkage collects dust and becomes difficult to clean.The synchronization gears are enclosed within the frame profile and separated from the main airway.
The actuator reaches its stop before all seals are uniformly compressed.Correct torque, end-stop adjustment and synchronized opposed blades distribute closing force across the face.
تطبيقات نموذجية
Cleanroom duct isolationPharmaceutical HVAC shutdown zonesLaboratory supply and exhaust branchesAirlock pressure-system isolationLow-leakage wall or ceiling openings
المعلمات الفنية
Typical construction data for an aluminum extremely low-leakage multileaf damper are listed below.
| المواد الأساسية | Extruded aluminum hollow airfoil blades with PE or TPE tip seals and closed-cell EVA jamb seals |
|---|---|
| سمك اللوحة | 20–35 mm extruded hollow blade depth |
| العرض الفعال | 200–1200 mm nominal frame width |
| الحد الأقصى الطول | Up to 1000 mm nominal frame height |
| الصلب يواجه سمك | 1.0–1.5 mm galvanized shaft plates, drive arm and linkage components |
| الكثافة الأساسية | Approximately 2700 kg/m³ for the extruded aluminum sections |
| الموصلية الحرارية | Approximately 160–205 W/(m·K) for aluminum blades and casing |
| إنهاء السطح | Natural anodized aluminum or powder-coated RAL finish with closed-cell seals |
| نوع المشترك | Flanged rectangular frame with geared opposed blades, compressible tip seals and continuous jamb seals |
| التخصيص | متوفر على أساس التطبيق المقصود وبيئة التشغيل. |
الخيارات المتاحة
Manual quadrant or electric actuatorSpring-return normally open or normally closed driveNatural anodized or powder-coated finishIntermediate frame sizes and installation subframe
Planning a Airtight Shut-Off Damper specification?
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