Product Details
Product Introduction:
Our company manufactures manual airflow control valves—also known as manual dampers or airflow regulators—which serve as essential components in ventilation and air-conditioning systems for regulating duct airflow and balancing flow among branch lines. By manually adjusting the vane angle to alter the effective cross-sectional area of the duct, these valves enable airflow regulation, duct on/off control, and system balancing, and are widely used in building fresh-air and exhaust systems, air-conditioning networks, and industrial ventilation ducts.
General technical parameters (taking the mainstream rectangular manual airflow damper as an example):
| Parameter Item |
Specification Details |
| Product Name |
Manual airflow control valve (manual damper) |
| Nominal size |
Rectangular specifications: 200×200 mm to 2000×2000 mm (custom non-standard sizes available); circular specifications: φ100 to φ1000 mm |
| Adjustment method |
Manual handle adjustment, can 0–90° continuously adjustable blade angle |
| Valve body material |
Galvanized steel sheet (standard), with optional stainless steel material (corrosion-resistant) / Humid environment) |
| Leaf form |
Open multiple leaves / Parallel blades with sealing strips, resulting in low air leakage when closed |
| Adjustment mechanism |
Handle-type / Worm-gear adjustment with scale indicator, lockable adjustment angle |
| Applicable medium |
Ordinary air, fresh air, exhaust air, medium temperature ≤80℃ |
| Applicable Pressure |
Under standard operating conditions ≤1000Pa |
| Air leakage rate |
Air leakage rate in the closed state ≤5% (≤3% with sealant clause) |
| Installation method |
Flanged pipe connections, supporting horizontal installation. / Vertical installation |
| Work environment |
-10℃ to +60℃, relative humidity ≤95% (no condensation) |
Applicable Scenarios and Selection Recommendations:
Core use cases:
1. Airflow regulation and balancing for each branch of the building’s fresh-air system and the air-conditioning supply-air system.
2. Airflow control for exhaust ducts and dust collection systems in factories and workshops
3. Opening and closing of kitchen exhaust and waste-gas treatment ducts, and airflow regulation
4. Airflow distribution in ventilation ducts for underground parking garages and equipment rooms
Key considerations for selection:
1. Select equipment based on duct size: Prioritize models that match the duct’s internal diameter to avoid installing reducers, ensuring stable airflow and minimal pressure loss during operation.
2. Select the model based on adjustment‑accuracy requirements: For standard systems, a handle‑type adjustment mechanism is suitable; for applications demanding high adjustment accuracy, a worm‑gear‑based adjustment mechanism with scale markings is recommended.
3. Operating Condition Matching: In humid and corrosive gas environments, stainless steel is the preferred material; for high‑temperature flue gases, a dedicated high‑temperature‑resistant damper should be selected.
Sealing requirements: In applications with stringent pipeline‑sealing demands, it is recommended to use dampers equipped with sealing gaskets to minimize air leakage in the closed position.
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Mobile phone:+86-188-6602-0062
Email:sddljnhb@163.com
Website:http://www.sddljnhb.com
Address: No. 5166, Tianqu East Road, Economic Development Zone, Dezhou City, Shandong Province
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