E-mail:Machine@chinaventech.com Expert for pre insulated duct CNC cutting machine.
VENTECH's Pir Pre Insulated Duct
As the main manufacturer of pir pre insulated duct, YINGDE VENTECH INTELLIGENT EQUIPMENT CO., LTD. carries out a strict quality control process. Through quality control management, we examine and refine the manufacturing defects of the product. We employ a QC team which is composed of educated professionals that have years of experience in the QC field to achieve the quality control goal.
In the list of best sellers, VENTECH can always find its place in that. The products under the brand are favored and praised by the international customers who never hesitate to offer good feedback on social media or through email. The high recognition of the products becomes an essential part of brand awareness. We believe that the products will keep developing to benefit more customers.
PIR pre-insulated ducts enhance thermal efficiency and reduce energy loss in HVAC systems. Utilizing a PIR foam core and protective outer layer, these ducts maintain consistent air temperature and minimize heat transfer. Suitable for commercial, industrial, and residential applications, they ensure optimal performance in heating, ventilation, and air conditioning.
Why you chose this product: PIR pre-insulated ducts offer superior thermal insulation due to their high R-value PIR material, reducing energy loss and lowering heating/cooling costs. Their pre-insulated design minimizes installation time and labor, ensuring consistent performance and long-term durability in HVAC systems.
Applicable scenarios: Ideal for residential, commercial, and industrial HVAC systems where maintaining consistent indoor temperatures and energy efficiency is critical. Commonly used in ductwork for air distribution in heating, ventilation, and air conditioning applications, particularly in spaces with limited installation access or where noise reduction is desired.
Recommended selection methods: Consider insulation thickness based on climate and energy efficiency goals, duct dimensions to match system requirements, and fire safety ratings for compliance. Opt for trusted brands with certifications (e.g., UL, ASTM) and verify compatibility with existing HVAC infrastructure for optimal performance.
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The statistics show that the annual output of hvac duct machine of YINGDE VENTECH INTELLIGENT EQUIPMENT CO., LTD. has continued to increase year by year. As time has proved the superior quality of our products, there are more and more customers seeking business opportunities from us. To provide customers with excellent products and service efficiently, we have enhanced our production capabilities by importing high-automation machines and enlarging our staff number. We are committed to making the best use of the expertise and high technologies cultivated through our rich experience to provide the greatest benefits for customers.
VENTECH INTELLIGENT EQUIPMENT always leads the foam cutting machine field in China. fabric cutting machine is the main product of VENTECH INTELLIGENT EQUIPMENT. It is diverse in variety. The material of automatic machine is well-selected by VENTECH INTELLIGENT EQUIPMENT. Its modular design makes the replacement for parts easier. It will not consume extra energy. The certification provided by the Environmental Protection Agency is considered the most authentic in this regard, and the Energy Star label is the mark of this certification. This product is renowned for its easy-to-operate structure.
VENTECH is equipped with professional service team to serve customers well. Inquiry!
VENTECH INTELLIGENT EQUIPMENT always leads the foam cutting machine field in China. fabric cutting machine is the main product of VENTECH INTELLIGENT EQUIPMENT. It is diverse in variety. The material of automatic machine is well-selected by VENTECH INTELLIGENT EQUIPMENT. Its modular design makes the replacement for parts easier. It will not consume extra energy. The certification provided by the Environmental Protection Agency is considered the most authentic in this regard, and the Energy Star label is the mark of this certification. This product is renowned for its easy-to-operate structure.
VENTECH is equipped with professional service team to serve customers well. Inquiry!
YINGDE VENTECH INTELLIGENT EQUIPMENT CO., LTD. is among those Chinese duct board cutting machine factories qualified for exports. We follow specific government regulations and has obtained permits and licences for exporting products. Our company has committed management teams as well as production capacity and financial capacity to be a competitive exporter.
VENTECH INTELLIGENT EQUIPMENT enjoys a good reputation and image among competitors. We embrace competence and experience in self-developing and manufacturing foam cutting machine. The PPPP series is widely praised by customers. VENTECH automation equipment has proper design and engineering. It is an outcome of our qualified architects, designers, and structural engineers using their aptitude. With an intuitive touch screen, it allows users to easily take control of the entire production process. It has considerable economic benefits. The working speed of this product can be easily set in line with requirements.
Thinking locally has become our business operation principle. We encourage employees to think locally with regard to customs, language, personalities of different countries. We believe thinking locally can shape our success.
VENTECH INTELLIGENT EQUIPMENT enjoys a good reputation and image among competitors. We embrace competence and experience in self-developing and manufacturing foam cutting machine. The PPPP series is widely praised by customers. VENTECH automation equipment has proper design and engineering. It is an outcome of our qualified architects, designers, and structural engineers using their aptitude. With an intuitive touch screen, it allows users to easily take control of the entire production process. It has considerable economic benefits. The working speed of this product can be easily set in line with requirements.
Thinking locally has become our business operation principle. We encourage employees to think locally with regard to customs, language, personalities of different countries. We believe thinking locally can shape our success.
How to fabricate and install PIR Pre-insulated duct system Part Two
Production of variable diameter duct
The reducing pipe of the rectangular air duct has two types: single-sided eccentricity and double-sided eccentricity. The angle φ of the single-sided variable diameter should be less than 30%, and the included angle of the double-sided variable diameter should be less than 60%. The production method of the variable diameter duct is the same as that of the straight duct, and one or three sides of the duct plate are inclined. , its assembly method is as shown in the figure, the length of the variable diameter air duct shall not be less than the difference between the long side of the big head minus the long side of the small head.
Production of three ventilation pipes
According to the design size, the opening size of the connecting port of the cutting air duct on the main air duct and the upper and lower plates of the branch air outlet is increased by 6mm for the inner wall of the branch air duct. The size of the opening at the connection with the left and right plates of the branch duct is the wall size of the branch duct. As shown in the figure, a 45% diversion angle should be set in the downwind direction, and the length of the diversion angle should not be less than half of the width of the branch duct , Cut the upper and lower plates connecting the branch air duct and the main air duct into a stepped shape, and the left and right plates are not cut into a stepped shape. If the height of the branch air duct is the same as that of the main air duct, the upper and lower plates of the main air duct and the upper and lower plates of the branch air duct are connected as a whole, which is convenient to manufacture and has high strength of reducing diameter.
Insert the branch pipe into the main air pipe, glue it with special glue, then tie it in place, clean up the excess glue, fill the gap, and put it on a flat place to cure.
Four ventilation pipes refer to the manufacturing method of three ventilation pipes;
Air-conditioning duct (wall thickness 25mm) board with a board ≥ 20cm can be used for the upper board with a long side ≤ 600mm.
Smoke prevention and exhaust air duct (wall thickness 18mm) board ≥ 20cm can be used for the production of the upper board of the air duct with the long side ≤ 1500mm.
The inside and outside of the air duct should be clean and smooth, and there should be no residual slurry. The residual slurry on the inner wall of the surrounding corner joints should not be higher than the plane 1.5mm;
The pipe body should be able to withstand 1m high, 5kg sandbags fall freely, impact 3 times without breaking the pipe body.
Duct reinforcement
When the side length of the air duct is greater than or equal to 1250mm, vertical and horizontal internal support and reinforcement should be carried out according to the working pressure of the air duct. The reinforcement is determined according to the following table, and the longitudinal reinforcement is set at a distance of 1300mm.
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Production of variable diameter duct
The reducing pipe of the rectangular air duct has two types: single-sided eccentricity and double-sided eccentricity. The angle φ of the single-sided variable diameter should be less than 30%, and the included angle of the double-sided variable diameter should be less than 60%. The production method of the variable diameter duct is the same as that of the straight duct, and one or three sides of the duct plate are inclined. , its assembly method is as shown in the figure, the length of the variable diameter air duct shall not be less than the difference between the long side of the big head minus the long side of the small head.
Production of three ventilation pipes
According to the design size, the opening size of the connecting port of the cutting air duct on the main air duct and the upper and lower plates of the branch air outlet is increased by 6mm for the inner wall of the branch air duct. The size of the opening at the connection with the left and right plates of the branch duct is the wall size of the branch duct. As shown in the figure, a 45% diversion angle should be set in the downwind direction, and the length of the diversion angle should not be less than half of the width of the branch duct , Cut the upper and lower plates connecting the branch air duct and the main air duct into a stepped shape, and the left and right plates are not cut into a stepped shape. If the height of the branch air duct is the same as that of the main air duct, the upper and lower plates of the main air duct and the upper and lower plates of the branch air duct are connected as a whole, which is convenient to manufacture and has high strength of reducing diameter.
Insert the branch pipe into the main air pipe, glue it with special glue, then tie it in place, clean up the excess glue, fill the gap, and put it on a flat place to cure.
Four ventilation pipes refer to the manufacturing method of three ventilation pipes;
Air-conditioning duct (wall thickness 25mm) board with a board ≥ 20cm can be used for the upper board with a long side ≤ 600mm.
Smoke prevention and exhaust air duct (wall thickness 18mm) board ≥ 20cm can be used for the production of the upper board of the air duct with the long side ≤ 1500mm.
The inside and outside of the air duct should be clean and smooth, and there should be no residual slurry. The residual slurry on the inner wall of the surrounding corner joints should not be higher than the plane 1.5mm;
The pipe body should be able to withstand 1m high, 5kg sandbags fall freely, impact 3 times without breaking the pipe body.
Duct reinforcement
When the side length of the air duct is greater than or equal to 1250mm, vertical and horizontal internal support and reinforcement should be carried out according to the working pressure of the air duct. The reinforcement is determined according to the following table, and the longitudinal reinforcement is set at a distance of 1300mm.
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10 Reasons to Choose Phenolic Duct(pre-insulated duct)
In recent years, phenolic aluminum foil composite air ducts have emerged and developed rapidly, showing their talents in ventilation projects with their unique advantages. It has been applied in many important engineering buildings. For a long time, in ventilation projects, the material of ventilation and air conditioning pipes is mostly galvanized steel sheets. The outside of the pipe is sometimes covered with insulating layers such as glass wool, polyethylene foam or rubber sponge. However, this kind of traditional air duct has high production cost, heavy weight, long installation period, poor heat insulation performance and poor appearance, which makes the users and designers of central air conditioners eagerly hope for the emergence of new air duct materials.
Phenolic aluminum foil composite board is a sandwich panel made of phenolic foam board and aluminum foil. On-site processing and molding according to the design specifications, one-time hoisting, no need to add insulation layer. The phenolic aluminum foil composite air duct system has excellent fire protection performance, excellent heat insulation performance, corrosion resistance and aging resistance, good sound insulation performance, light weight and convenient construction, and has achieved obvious social and economic benefits.
Here are ten reasons to choose phenolic duct:
1. Lightweight to reduce building loads
The phenolic aluminum foil composite air duct is light in weight, about 1.4 kg/㎡. The bulk density of galvanized steel air duct (0.8mm thick) and glass fiber reinforced plastic air duct (3 mm thick) is 7.08 kg/㎡ and 15~20 kg/㎡ respectively. This can greatly reduce the load on the building, and is extremely beneficial to the installation of the air duct. When installing, it only needs to set up a bracket every 4m or so to have enough supporting force. This greatly reduces the requirements for the bearing capacity of brackets and hangers, making transportation and installation very convenient.
2. Good thermal insulation, can greatly reduce the heat dissipation loss of the air conditioner
The thermal conductivity of phenolic composite air duct is 0.016~0.036W/(m·k). The thermal conductivity of galvanized steel air ducts and FRP air ducts is much larger. In addition, the unique connection method of the phenolic composite air duct ensures the excellent air tightness of the ventilation system, which is close to 8 times that of the galvanized steel air duct. Some data show that when transporting the same amount of heat (cold), the heat loss of the galvanized steel air duct is 15%, the heat loss of the fiberglass air duct is 8%, and the heat loss of the phenolic foam insulation material air duct is less than 2%.
3. Durable and long service life
Phenolic composite air ducts are not as easy to rust, aging, and damage as traditional air ducts, and their service life is at least 15 years. The service life is more than 3 times longer than that of traditional air ducts. In addition, the reuse rate of phenolic composite air ducts can reach 60% to 80%, while traditional air ducts can hardly be reused.
4. Good noise cancellation
The interlayer of the phenolic aluminum foil composite air duct is a porous phenolic foam material board, which has good noise reduction performance. In the central air-conditioning system, it can significantly reduce indoor noise. The phenolic composite air duct itself is a very good pipe muffler, and there is no need to install muffler accessories such as muffler covers or muffler elbows.
5. Lower the height of the storey
Traditional air ducts require on-site insulation layer construction, so a certain construction height is required, which puts additional requirements on the building's storey height. The phenolic aluminum foil composite air duct does not require on-site insulation construction, so there is no need to reserve construction space, which can reduce the height of the building.
6. The construction period can be shortened
The phenolic aluminum foil composite air duct is very light in weight, and the installation is more convenient and quicker than the traditional air duct. When the air duct is hoisted, the required hangers are simple, the number is small, and almost no machinery is used. The production is simple and simple, completely breaking through the traditional craft, greatly shortening the construction period, and the on-site modification is also very convenient. According to on-site calculations, each worker can install 20.0~30.0 ㎡ per day during the installation of phenolic aluminum foil composite air duct, while the traditional air duct is only 4.0~5.0 ㎡/(day · person). Compared with traditional air duct manufacturing, the production efficiency of phenolic aluminum foil composite air duct is increased by 4 to 5 times.
7. Hygiene
The surface of the phenolic aluminum foil composite air duct is sealed with aluminum foil, thus ensuring the hygiene of the conveying medium, avoiding secondary pollution, and the inner layer has no condensed water and no rust. In traditional air ducts, glass wool and asbestos are easy to absorb moisture, and the thermal insulation performance is seriously deteriorated after absorbing water. Moreover, asbestos is a carcinogen, and glass wool dust can irritate the skin and make construction workers itchy all over. In addition, galvanized steel air ducts are prone to rust and cold bridges.
8. Beautiful, suitable for surface installation
Phenolic aluminum foil composite air duct can be made into various colors, beautiful, especially suitable for surface installation. The surface of the traditional air duct needs to be wrapped with aluminum foil on site, so the surface installation effect is not very good.
9. Wide range of applications
Galvanized steel air ducts are widely used, but their service life is low in high humidity environments. The use of FRP ducts in hospitals, food processing plants, basements and other places with dust-proof requirements and high humidity is also restricted. The phenolic aluminum foil composite air duct can be widely used in industrial and civil buildings, hotels, hospitals, office buildings and other places with special requirements.
10. Strong temperature adaptability
Phenolic composite air ducts are suitable for a wide range of temperatures and can be used at high and low temperatures (-140°C to 150°C), unlike some other composite air ducts that can only be used at a temperature of 50°C.
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In recent years, phenolic aluminum foil composite air ducts have emerged and developed rapidly, showing their talents in ventilation projects with their unique advantages. It has been applied in many important engineering buildings. For a long time, in ventilation projects, the material of ventilation and air conditioning pipes is mostly galvanized steel sheets. The outside of the pipe is sometimes covered with insulating layers such as glass wool, polyethylene foam or rubber sponge. However, this kind of traditional air duct has high production cost, heavy weight, long installation period, poor heat insulation performance and poor appearance, which makes the users and designers of central air conditioners eagerly hope for the emergence of new air duct materials.
Phenolic aluminum foil composite board is a sandwich panel made of phenolic foam board and aluminum foil. On-site processing and molding according to the design specifications, one-time hoisting, no need to add insulation layer. The phenolic aluminum foil composite air duct system has excellent fire protection performance, excellent heat insulation performance, corrosion resistance and aging resistance, good sound insulation performance, light weight and convenient construction, and has achieved obvious social and economic benefits.
Here are ten reasons to choose phenolic duct:
1. Lightweight to reduce building loads
The phenolic aluminum foil composite air duct is light in weight, about 1.4 kg/㎡. The bulk density of galvanized steel air duct (0.8mm thick) and glass fiber reinforced plastic air duct (3 mm thick) is 7.08 kg/㎡ and 15~20 kg/㎡ respectively. This can greatly reduce the load on the building, and is extremely beneficial to the installation of the air duct. When installing, it only needs to set up a bracket every 4m or so to have enough supporting force. This greatly reduces the requirements for the bearing capacity of brackets and hangers, making transportation and installation very convenient.
2. Good thermal insulation, can greatly reduce the heat dissipation loss of the air conditioner
The thermal conductivity of phenolic composite air duct is 0.016~0.036W/(m·k). The thermal conductivity of galvanized steel air ducts and FRP air ducts is much larger. In addition, the unique connection method of the phenolic composite air duct ensures the excellent air tightness of the ventilation system, which is close to 8 times that of the galvanized steel air duct. Some data show that when transporting the same amount of heat (cold), the heat loss of the galvanized steel air duct is 15%, the heat loss of the fiberglass air duct is 8%, and the heat loss of the phenolic foam insulation material air duct is less than 2%.
3. Durable and long service life
Phenolic composite air ducts are not as easy to rust, aging, and damage as traditional air ducts, and their service life is at least 15 years. The service life is more than 3 times longer than that of traditional air ducts. In addition, the reuse rate of phenolic composite air ducts can reach 60% to 80%, while traditional air ducts can hardly be reused.
4. Good noise cancellation
The interlayer of the phenolic aluminum foil composite air duct is a porous phenolic foam material board, which has good noise reduction performance. In the central air-conditioning system, it can significantly reduce indoor noise. The phenolic composite air duct itself is a very good pipe muffler, and there is no need to install muffler accessories such as muffler covers or muffler elbows.
5. Lower the height of the storey
Traditional air ducts require on-site insulation layer construction, so a certain construction height is required, which puts additional requirements on the building's storey height. The phenolic aluminum foil composite air duct does not require on-site insulation construction, so there is no need to reserve construction space, which can reduce the height of the building.
6. The construction period can be shortened
The phenolic aluminum foil composite air duct is very light in weight, and the installation is more convenient and quicker than the traditional air duct. When the air duct is hoisted, the required hangers are simple, the number is small, and almost no machinery is used. The production is simple and simple, completely breaking through the traditional craft, greatly shortening the construction period, and the on-site modification is also very convenient. According to on-site calculations, each worker can install 20.0~30.0 ㎡ per day during the installation of phenolic aluminum foil composite air duct, while the traditional air duct is only 4.0~5.0 ㎡/(day · person). Compared with traditional air duct manufacturing, the production efficiency of phenolic aluminum foil composite air duct is increased by 4 to 5 times.
7. Hygiene
The surface of the phenolic aluminum foil composite air duct is sealed with aluminum foil, thus ensuring the hygiene of the conveying medium, avoiding secondary pollution, and the inner layer has no condensed water and no rust. In traditional air ducts, glass wool and asbestos are easy to absorb moisture, and the thermal insulation performance is seriously deteriorated after absorbing water. Moreover, asbestos is a carcinogen, and glass wool dust can irritate the skin and make construction workers itchy all over. In addition, galvanized steel air ducts are prone to rust and cold bridges.
8. Beautiful, suitable for surface installation
Phenolic aluminum foil composite air duct can be made into various colors, beautiful, especially suitable for surface installation. The surface of the traditional air duct needs to be wrapped with aluminum foil on site, so the surface installation effect is not very good.
9. Wide range of applications
Galvanized steel air ducts are widely used, but their service life is low in high humidity environments. The use of FRP ducts in hospitals, food processing plants, basements and other places with dust-proof requirements and high humidity is also restricted. The phenolic aluminum foil composite air duct can be widely used in industrial and civil buildings, hotels, hospitals, office buildings and other places with special requirements.
10. Strong temperature adaptability
Phenolic composite air ducts are suitable for a wide range of temperatures and can be used at high and low temperatures (-140°C to 150°C), unlike some other composite air ducts that can only be used at a temperature of 50°C.
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Address : No.3, Hongcha Road, Yinghong Industrial Zone, Yingde, Qingyuan, Guangdong, China.
Address : No.3, Hongcha Road, Yinghong Industrial Zone, Yingde, Qingyuan, Guangdong, China.
Zip Code：513042
