Air flow control valve is used for a wide range of mining, civil construction HVAC systems, air flow rate for precise adjustment is controlled ventilation to achieve a variety of environments. One of the key device mode. Its main feature is flexible operation, low noise, small amount of leakage, (closed type leakage <0.5%) Operating temperature region wide, reliable structure, safe and convenient. Too Island air-conditioning plant is perfect for you. Electric air volume control structure principle applies to supply or exhaust air flow range of about 5 Pa pressure range 20-1000 air volume control with high precision, make sure the duct layout optimal flow characteristics to meet before the factory is set up wind or programming, Each device in the calibration test bench airflow performance. Identifies relevant parameters such as the need to re-measure or set of wind magnitude horizontal or vertical installation can be completely closed damper tightness VAF valve is closed at the scene on a good affixed to each piece of equipment test label, leakage does not exceed 5℅ regulator for mechanical parts, no maintenance.