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How to fabricate and install PIR Pre-insulated duct system Part One
As PIR pre-insulated duct system is getting its way into the HVAC industry. The knowledge of duct fabrication is necessary for pre-insulated duct fabricatiors and air conditioning contractors. This article shows how to fabricate and install PIR pre-insulated duct systems by hand made. But if you want to speed up the duct fabrication process, we recommend a pre-insulated duct CNC cutting machine. Using a pre-insulated duct CNC cutting machine will definitely improve your efficiency by more than 80%.
Duct fabrication tools required
A. Platform cutting machine: cutting PIR duct boards of different specifications;
B. Portable cutting machine: cutting reducing diameter, tee, elbow pipe fittings;
C. Retention device: used to fix the 90° angle of the air duct and bundle the assembled air duct.
Air duct production quality requirements:
A. The cutting line is straight, and the diagonal length error of the duct plate is less than 5mm; CITIC Construction Investment: Compressed air energy storage will usher in greater development opportunities.
B. Fabrication and installation of composite air ducts. Today, the message line of this step of the b ladder is deep, and the degree of 90% (thick people are 25 meters and do not know the m road board!) is 18-21mm, (thickness 18m open m board) is 18-21mm.
C. The length of the inner side of the air duct is the standard size of the drawing. When the length of the single section of the air duct is less than or equal to 1250mm, the length of the air duct shall not be greater than 1250mm, and the length of the air duct shall not be greater than 1300mm.
D. The preparation of special glue shall be prepared on site in strict accordance with the instructions, and waste is strictly prohibited.
Making a straight PIR pre-insluated duct.
A. First, use a utility knife to cut off the stepped insulation layer of the side panel to ensure that the stepped position is flat;
B. Apply special glue on the steps of the side panel, and the glue should be uniform, full and appropriate;
C. First put the bottom panel of the air duct on the manufacturing retaining device, then insert the left and right panels along the retaining device on the edge of the bottom panel, the left and right and the length of the upper and lower panels are offset by 80mm-150mm according to the size of the air duct, and then insert the upper panel into the left and right panels Bind the air ducts that have just been assembled with a strapping tape between 55mm-650mm.
D. If the perimeter of the bundled air duct is less than 2000mm, the difference between the diagonals should not exceed 3mm, and the difference between the diagonals if the perimeter is more than 2000mm should not exceed 5mm. If necessary, use reinforcement bars and reinforcement columns to locate the inner diagonal. , Prevent the deformation of the air duct, and remove the excess glue and fill the gap.
E. The 80mm-150mm dislocation of the upper and lower plates of the air duct and the left and right plates does not retain residual pulp.
Using a pre-insulated duct CNC cutting machine will definitely improve your duct making efficiency. A pre-insulated duct CNC cutting machine is a computerized cutting machine that cuts fast and accurately.
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