The air duct mainly refers to the ventilation duct of the central air-conditioning system, which is often overlooked, but is an important part of the air-conditioning system. The air duct is made of thin steel plate, aluminum plate, hard polyvinyl chloride plate, glass fiber reinforced plastic and other composite materials. It is a general term for various pipes used to transport air and air mixture. Lightweight, high hardness, durable aluminum foil, composite extruded air conditioning insulation board, independent closed bubble structure inside, embossed aluminum foil outside, with high pressure resistance, non-absorbent, moisture-proof, air-tight, lightweight, long service life Long, low thermal conductivity, long-lasting thermal insulation. The advantages are that materials are saved, project investment is reduced; air leakage is small, energy consumption is reduced, and ventilation duct equipment saves operating costs, which is very popular among workshop decoration and construction enterprises. Standard straight pipes are directly pressed into one-piece flanges on the assembly line. After cutting non-standard straight pipes, elbows, tees, crosses, accessories, etc., TDF flange forming is completed on a single machine. The flange corners are directly stamped and formed by the mold, and they can be stuck at the four corners during installation. The flange card for the connection between flanges is made of galvanized steel sheet, and is cut into a uniform size for installation and connection after being formed by a flange card forming machine. Because the TDF common plate flange is integrated with the pipeline steel plate, the ventilation duct manufacturer does not need to punch and riveted like the angle steel flange, and use a special flange card on the connection of the two pipes, and use bolts to connect the four corners with a 90-degree flange angle. .
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