Air volume control valve is the industrial plant civil construction ventilation, air conditioning and air purification project indispensable central air-conditioning end accessories, generally used in air conditioning, ventilation pipes, used to adjust the air flow manifold can also be used for fresh air and return air mix adjustment.

一、Air volume control valve characteristics
(1) off more Yefeng amount regulating valve to take over the same size with the national standardization of ventilation ducts specified rectangular duct size.
(2) air volume control valve blade off cis to open in ventilation, air conditioning, air purification system as regulating valve.
(3) Determination by test, air volume control valve air tightness good, the relative amount of air leakage at around 5%, regulated performance.


二、Air volume control valve structural features
(1) of the air flow control valve in the full blade width unified four specifications, leaf-shaped diamond-shaped double blade, between blade soft lap, so good airtight performance.
(2) air volume control valve body architecture with 2 mm galvanized sheet cold rolling after molding, carbon dioxide gas shielded welding or welded ordinary Q235 plate processing; blade with 1 mm corrugated galvanized sheet cold rolling, two synthesis interpolating axis spot welding, or 2 mm G235 steel plate cold forming, punching chip inserted square shaft or welding circular shaft.
(3) The valve sub-manual, electric, divided according to the materials used: the same iron, galvanized sheet, aluminum plate, stainless steel plate of four, body structure and size specifications.

三、Air volume control valve Scope
Widely used in mining, civil construction HVAC systems, air flow is accurately adjusted, is one of the key control device to achieve a variety of environments ventilation mode. Its main feature is flexible operation, low noise, leaking a small amount (hermetic leakage ＜ 0.5%) Operating temperature region wide structure reliable, safe and convenient.
四、Air volume control valve type
Air volume control valve is generally divided into the following categories: multi-leaf off valve, butterfly valve (single leaf valve), cis-open control valve.

Structure principle
Electric air volume control
Suitable for supply or exhaust
The flow rate range of about 5:1
Differential pressure range of 20 to 1000 Pa
High precision air volume control, make sure the duct is arranged to meet the best flow characteristics
Factory set amount of wind or programming, each device in the calibration bench airflow performance tests. The relevant parameters are identified on each device attached to the test label
If you need to re-measure or set airflow value in the field
Horizontal or vertical mounting
Damper completely closed
VAF valve closed when the air tightness, air leakage does not exceed 5℅
Regulator mechanical parts, no maintenance