The air volume adjustment valve is an indispensable central air conditioning end fitting in the ventilation, air conditioning and air purification projects of industrial plants and civil buildings, generally used in air conditioning, ventilation system piping, used to adjust the air volume of the branch pipe, can also be used for fresh air and return air mixture adjustment.

Air volume adjustment valve blade is divided into open and open type. The size of the receiver of the multi-blade air flow control valve is the same as the size of the rectangular duct specified in the national ventilation duct standardization. The air volume control valve in the blade width of the whole unified for the four specifications, blade shape for the diamond-shaped double blade, the blade between the soft lap, so the sealing performance is good. Through the test measurement, the airtightness of the air volume control valve is good, its relative air leakage is about 5%, the adjustment performance is good.

Control valve is divided into manual, electric, according to the materials used: iron plate, galvanized plate, aluminum alloy plate, stainless steel plate four kinds, the valve body structure and specifications of the same size.

Dampers are widely used in industrial, mining and civil building HVAC systems to accurately regulate air flow, is one of the key equipment to achieve a variety of environments to control the ventilation mode. Its main features are flexible operation, low noise, small leakage, (closed leakage < 0.5%) wide working temperature range, reliable structure, safety and convenience.