E-mail:Machine@chinaventech.com Expert for pre insulated duct CNC cutting machine.
High Quality Ductwork Suppliers
ductwork suppliers is served by YINGDE VENTECH INTELLIGENT EQUIPMENT CO., LTD., a responsible enterprise. We select high-quality raw materials for processing, which effectively improve the service life and greatly optimize the performance of the product. At the same time, we adhere to the principle of green environmental protection, which is one of the reasons why this product is favored by the customers.
In this changing society, VENTECH, a brand that always keeps up with the times, makes unremitting efforts to spread our fame on social media. Using advanced technology, we make the products to be of high quality. Having collected and analyzed the feedback from the media like Facebook, we conclude that many customers speak highly of our products and tend to try our developed products in the future.
Ductwork suppliers provide essential components for efficient HVAC systems in residential, commercial, and industrial settings, ensuring optimal airflow, temperature control, and air quality. Tailored solutions are offered to cater to diverse architectural and functional requirements, supporting sustainable building practices. These systems serve as the backbone of modern ventilation infrastructure.
How to choose ductwork suppliers?
- Choose reliable ductwork suppliers for consistent performance and minimal maintenance, ensuring HVAC systems operate smoothly over time.
- Ideal for commercial buildings, industrial facilities, and residential HVAC installations where dependability is critical.
- Look for certifications like UL or SMACNA, and check customer reviews for proven track records.
- Energy-efficient ductwork reduces air leakage and thermal loss, lowering energy bills and improving HVAC system performance.
- Best suited for green building projects, retrofitting old systems, or areas requiring strict temperature control.
- Opt for suppliers offering insulated ducts with high R-values and airtight sealing solutions.
- Durable ductwork withstands wear, corrosion, and extreme temperatures, ensuring long-term structural integrity and reduced replacement needs.
- Recommended for industrial environments, coastal regions with humidity, or facilities with heavy HVAC usage.
- Select suppliers using galvanized steel, stainless steel, or reinforced fiberglass materials with anti-corrosion coatings.
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There are plenty of manufacturers of laser cutting machine offering ex-works price. The price can be obtained while making an initial quotation for the sale of goods without any costs included. To get this price, buyers should incur the risks for bringing the goods to their final destination. Generally, buyers often should have all the export documentation, arrange the collection of the freight from the designated locations, and are responsible for clearing the goods through Customs. For YINGDE VENTECH INTELLIGENT EQUIPMENT CO., LTD., we have accumulated rich experience in offering products at an ex-works price to customers from different countries, and also we can guarantee customers can get the maximum interests from this.
It is our exquisite automatic machine that boosts the reputation of VENTECH. The fabric cutting machine series is available in a wide range of types and specifications. With the widely raw materials and automation equipment, this automatic machine is worth expanding and application. This product is characterized by its impact resistance. VENTECH INTELLIGENT EQUIPMENT's excellent sales group is full of foreign sales experience. This product enables operators to work more relaxingly.
VENTECH INTELLIGENT EQUIPMENT aims to be the leader in the automatic machine industry. Contact us!
It is our exquisite automatic machine that boosts the reputation of VENTECH. The fabric cutting machine series is available in a wide range of types and specifications. With the widely raw materials and automation equipment, this automatic machine is worth expanding and application. This product is characterized by its impact resistance. VENTECH INTELLIGENT EQUIPMENT's excellent sales group is full of foreign sales experience. This product enables operators to work more relaxingly.
VENTECH INTELLIGENT EQUIPMENT aims to be the leader in the automatic machine industry. Contact us!
What is duct and types of duct
In a HVAC system, ductworks and insulation is one of the essential part to consider. A proper ductwork and insulation will save users lots of costs for electricity and maintenance. Ducts are used to distribute air for various air conditioning systems and ventilation systems. Many people are confused about the duct types. Actually, ducts used for HVAC systems and home ventilation systems are different in many aspects. So today we’ll take a look at different types of ducts.
Flexible Ducts
Flexible ducts are one of the most common used ducts in an HVAC system or in a home ventilation system. They are relatively cheap, light in weight, and easy to install. So it’s not necessary to use a CNC duct fabrication machine. They are often insulated with fiberglass insulations when applied for air conditioning. However, flexible ducts which have no insulations are only used for ventilation such as toilet exhaust.
Flexible ducts are common in use for their low prices and easy installation. However, the main disadvantage of flexible ducts is high pressure drop and low airflow. Because flexible ducts are flexible, they are prone to sharp bends. If a flexible duct is bent too much, it can block the airflow entirely. Hence, it is advisable that a flexible duct should not be more than 2.5 meters in length.
Rigid Ducts
The second commonly used type is rigid ducts, which are also known as sheet metal ducts. Rigid ducts often are made of sheet metals which are usually galvanized steels. Rigid ducts can be made in square, rectangular or round shapes. A CNC duct fabrication machine is needed to speed up the fabrication process.
Square rigid ducts are more economical to produce than both rectangular and round rigid ducts. Because the total surface area needed lesser. Therefore, the material used is lesser. In HVAC, main ducts and branch ducts are usually rigid ducts. They are more likely in a rectangular shape rather than in a square shape. Even though the cost is higher. Round ducts are more preferred when installed below the ceiling especially when the interior aesthetic requirement is high.
If rigid ducts are used for air conditioning, they must be insulated to prevent condensation. People use either fiberglass insulations or cross-linked polyethylene for insulations. If it is the former, the outer appearance will be in silver color. Otherwise, they may look grey in color.
Pre-Insulated Ducts
Pre-insulated ducts are made of either polyurethane (PU) or polyisocyanurate (PIR) material. They have been launched in the market for years, but the application rate is rather low. Because the material cost is higher than the other types.
However, pre-insulated ducts have many benefits that other materials don’t have. Firstly, they have a very high efficiency. Pre-insulated ducts are joined by glues and clips, sort of like a slot-in. Such a jointing method has a much lower leakage rate than both slip & drive joint and TDC joint.
Secondly, pre-insulated ducts are pre-insulated and hence, they do not require further insulations on-site which enable them to be installed very close to the soffit slab or even flush with the soffit slab. So, pre-insulated ducts occupy less space than rigid ducts.
Last but not least, pre-insulated ducts are much lighter than traditional galvanized iron rigid ducts. Thus, the installation process is faster. If you use a CNC duct fabrication machine to do the measuring and cutting, it will be even faster. There are more and more HVAC contractors willing to use pre-insulated ducts for their projects. For big HVAC contractors, they often have many projects on-going, to speed up the fabrication process, they often buy CNC duct fabrication machines to replace man cutting. A CNC duct fabrication machine is fully automatic, which cuts phenolic boards fast and precisely. The application of CNC duct fabrication machines has revolutionized the duct industry since its launch.
In conclusion, if your budget is enough, we suggest you to use pre-insulated ducts for better efficiency, fire-proof, and easier fabrication. If you budget is limited, then use rigid ducts as a second choice. If it’s for home ventilation, and you have very small budgets, then use flexible ducts might also work.
In a HVAC system, ductworks and insulation is one of the essential part to consider. A proper ductwork and insulation will save users lots of costs for electricity and maintenance. Ducts are used to distribute air for various air conditioning systems and ventilation systems. Many people are confused about the duct types. Actually, ducts used for HVAC systems and home ventilation systems are different in many aspects. So today we’ll take a look at different types of ducts.
Flexible Ducts
Flexible ducts are one of the most common used ducts in an HVAC system or in a home ventilation system. They are relatively cheap, light in weight, and easy to install. So it’s not necessary to use a CNC duct fabrication machine. They are often insulated with fiberglass insulations when applied for air conditioning. However, flexible ducts which have no insulations are only used for ventilation such as toilet exhaust.
Flexible ducts are common in use for their low prices and easy installation. However, the main disadvantage of flexible ducts is high pressure drop and low airflow. Because flexible ducts are flexible, they are prone to sharp bends. If a flexible duct is bent too much, it can block the airflow entirely. Hence, it is advisable that a flexible duct should not be more than 2.5 meters in length.
Rigid Ducts
The second commonly used type is rigid ducts, which are also known as sheet metal ducts. Rigid ducts often are made of sheet metals which are usually galvanized steels. Rigid ducts can be made in square, rectangular or round shapes. A CNC duct fabrication machine is needed to speed up the fabrication process.
Square rigid ducts are more economical to produce than both rectangular and round rigid ducts. Because the total surface area needed lesser. Therefore, the material used is lesser. In HVAC, main ducts and branch ducts are usually rigid ducts. They are more likely in a rectangular shape rather than in a square shape. Even though the cost is higher. Round ducts are more preferred when installed below the ceiling especially when the interior aesthetic requirement is high.
If rigid ducts are used for air conditioning, they must be insulated to prevent condensation. People use either fiberglass insulations or cross-linked polyethylene for insulations. If it is the former, the outer appearance will be in silver color. Otherwise, they may look grey in color.
Pre-Insulated Ducts
Pre-insulated ducts are made of either polyurethane (PU) or polyisocyanurate (PIR) material. They have been launched in the market for years, but the application rate is rather low. Because the material cost is higher than the other types.
However, pre-insulated ducts have many benefits that other materials don’t have. Firstly, they have a very high efficiency. Pre-insulated ducts are joined by glues and clips, sort of like a slot-in. Such a jointing method has a much lower leakage rate than both slip & drive joint and TDC joint.
Secondly, pre-insulated ducts are pre-insulated and hence, they do not require further insulations on-site which enable them to be installed very close to the soffit slab or even flush with the soffit slab. So, pre-insulated ducts occupy less space than rigid ducts.
Last but not least, pre-insulated ducts are much lighter than traditional galvanized iron rigid ducts. Thus, the installation process is faster. If you use a CNC duct fabrication machine to do the measuring and cutting, it will be even faster. There are more and more HVAC contractors willing to use pre-insulated ducts for their projects. For big HVAC contractors, they often have many projects on-going, to speed up the fabrication process, they often buy CNC duct fabrication machines to replace man cutting. A CNC duct fabrication machine is fully automatic, which cuts phenolic boards fast and precisely. The application of CNC duct fabrication machines has revolutionized the duct industry since its launch.
In conclusion, if your budget is enough, we suggest you to use pre-insulated ducts for better efficiency, fire-proof, and easier fabrication. If you budget is limited, then use rigid ducts as a second choice. If it’s for home ventilation, and you have very small budgets, then use flexible ducts might also work.
Performance characteristics of ventilation ducts in HVAC systems
With the continuous improvement of our country's economic level, people's living standards are also rising year by year. At the same time, the status of our country's ventilation and air-conditioning projects in our country's construction industry is gradually increasing. The types of air conditioners have become diverse and their functions have become more diverse. In the selection of air-conditioning materials, materials with light weight, energy saving, noise reduction, and good fire resistance are usually selected as the leading materials for ventilation ducts. Due to the different requirements for ventilation ducts in building HVAC system engineering, ventilation ducts of various materials emerge in an endless stream, and gradually develop and progress in their corresponding projects. With the continuous development and progress of our country's science, various new technologies and new materials have emerged, so as to continuously manufacture new materials that are more in line with the requirements of our country's HVAC system.
1. Fire performance
The main material of the super duct with fire resistance is glass fiber wool board, which has a certain degree of non-combustibility. In the manufacturing method of the super air duct, the glass fiber cloth and the aluminum foil cloth are respectively compounded on both sides of the non-combustible glass fiber wool board to make the fiberglass duct and aluminum foil duct. The air duct made of this material and process is non-combustible and has good fire resistance. Although inorganic glass and galvanized iron air ducts are both non-combustible materials, the thermal insulation material in the air ducts made of this material may not be incombustible. Therefore, the air duct products made of this product are not stable and cannot be is widely used.
2. Noise reduction performance
The material of the super duct with noise reduction performance is a porous sound-absorbing material, which has a good sound absorption effect on sounds of various frequencies. This super duct is a powerful tubular muffler. The noise generated by the operation of the air-conditioning equipment has a good muffler effect, and the effect is particularly obvious with the length of the pipeline, and the muffler can be omitted. However, the inorganic glass fiber reinforced plastic air duct and the galvanized iron air duct need to add a muffler, and these two kinds of air ducts do not have sound-absorbing performance.
3. Moisture resistance
The outer surface of the super duct is made of aluminum cloth, which has super anti-corrosion properties. At the same time, there are no materials and components that are perishable and susceptible to moisture in the air duct. Because the air duct has been in a relatively humid environment for a long time, the glass fiber board material is used, because the water absorption rate of the material is less than 2% and the porous material can fully prevent the water from being soaked for a long time. will not be changed.
Because the galvanized iron sheet is easy to rust and get damp, it will be seriously damaged when transmitting relatively humid air-conditioning air, especially the corrosion degree at the bite of the iron sheet will be more serious, and it is not easy to handle, thus reducing the overall air conditioning. service life of the system.
4. Air leakage
While regulating the air duct, the relationship between the air leakage of the air duct and the length of the duct and the degree of air tightness should also be considered, and it should be calculated in accordance with the relevant air volume percentage. For the production process of the super duct, it is mainly grooved, tenoned, and finally connected by gluing, and finally sealed with aluminum foil tape, so as to reduce the air leakage.
5. Construction and installation
In terms of construction and installation, the quality of galvanized iron air ducts is relatively heavy, and the production and installation cycle is relatively long. When the direction needs to be changed, the modification process is cumbersome. Moreover, a large space should be reserved around it as the installation and operation space of the holding layer, which leads to an unsightly appearance of the HVAC system, and the increase of the muffler increases the difficulty and cost of installation. The composite wave fiberboard air duct is relatively light in weight, easy to install, and has the effect of heat preservation and noise reduction at the same time. If it needs to be modified, it can be changed reasonably according to the conditions of the site. Its exterior can be painted with colorful paints according to its own preferences, so as to achieve the effect of harmony and unity with the surrounding environment. Because it has the characteristics of fast installation and light weight, it is more in line with the development trend of our country's modern HVAC system, and is more suitable for our country's modern high-rise buildings. Because the super duct is not a rigid material, it should be stored in accordance with the relevant requirements during the construction process, and the relevant staff must abide by the relevant national standards for construction during construction to avoid losses.
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With the continuous improvement of our country's economic level, people's living standards are also rising year by year. At the same time, the status of our country's ventilation and air-conditioning projects in our country's construction industry is gradually increasing. The types of air conditioners have become diverse and their functions have become more diverse. In the selection of air-conditioning materials, materials with light weight, energy saving, noise reduction, and good fire resistance are usually selected as the leading materials for ventilation ducts. Due to the different requirements for ventilation ducts in building HVAC system engineering, ventilation ducts of various materials emerge in an endless stream, and gradually develop and progress in their corresponding projects. With the continuous development and progress of our country's science, various new technologies and new materials have emerged, so as to continuously manufacture new materials that are more in line with the requirements of our country's HVAC system.
1. Fire performance
The main material of the super duct with fire resistance is glass fiber wool board, which has a certain degree of non-combustibility. In the manufacturing method of the super air duct, the glass fiber cloth and the aluminum foil cloth are respectively compounded on both sides of the non-combustible glass fiber wool board to make the fiberglass duct and aluminum foil duct. The air duct made of this material and process is non-combustible and has good fire resistance. Although inorganic glass and galvanized iron air ducts are both non-combustible materials, the thermal insulation material in the air ducts made of this material may not be incombustible. Therefore, the air duct products made of this product are not stable and cannot be is widely used.
2. Noise reduction performance
The material of the super duct with noise reduction performance is a porous sound-absorbing material, which has a good sound absorption effect on sounds of various frequencies. This super duct is a powerful tubular muffler. The noise generated by the operation of the air-conditioning equipment has a good muffler effect, and the effect is particularly obvious with the length of the pipeline, and the muffler can be omitted. However, the inorganic glass fiber reinforced plastic air duct and the galvanized iron air duct need to add a muffler, and these two kinds of air ducts do not have sound-absorbing performance.
3. Moisture resistance
The outer surface of the super duct is made of aluminum cloth, which has super anti-corrosion properties. At the same time, there are no materials and components that are perishable and susceptible to moisture in the air duct. Because the air duct has been in a relatively humid environment for a long time, the glass fiber board material is used, because the water absorption rate of the material is less than 2% and the porous material can fully prevent the water from being soaked for a long time. will not be changed.
Because the galvanized iron sheet is easy to rust and get damp, it will be seriously damaged when transmitting relatively humid air-conditioning air, especially the corrosion degree at the bite of the iron sheet will be more serious, and it is not easy to handle, thus reducing the overall air conditioning. service life of the system.
4. Air leakage
While regulating the air duct, the relationship between the air leakage of the air duct and the length of the duct and the degree of air tightness should also be considered, and it should be calculated in accordance with the relevant air volume percentage. For the production process of the super duct, it is mainly grooved, tenoned, and finally connected by gluing, and finally sealed with aluminum foil tape, so as to reduce the air leakage.
5. Construction and installation
In terms of construction and installation, the quality of galvanized iron air ducts is relatively heavy, and the production and installation cycle is relatively long. When the direction needs to be changed, the modification process is cumbersome. Moreover, a large space should be reserved around it as the installation and operation space of the holding layer, which leads to an unsightly appearance of the HVAC system, and the increase of the muffler increases the difficulty and cost of installation. The composite wave fiberboard air duct is relatively light in weight, easy to install, and has the effect of heat preservation and noise reduction at the same time. If it needs to be modified, it can be changed reasonably according to the conditions of the site. Its exterior can be painted with colorful paints according to its own preferences, so as to achieve the effect of harmony and unity with the surrounding environment. Because it has the characteristics of fast installation and light weight, it is more in line with the development trend of our country's modern HVAC system, and is more suitable for our country's modern high-rise buildings. Because the super duct is not a rigid material, it should be stored in accordance with the relevant requirements during the construction process, and the relevant staff must abide by the relevant national standards for construction during construction to avoid losses.
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How to use rubber and plastic insulation for air ducts?
1. Scope of application
This construction method is applicable to the rubber and plastic insulation construction of rectangular metal air ducts in various types of air-conditioning and ventilation systems.
2. Process principle
This construction method is formed by improving the rubber and plastic insulationof the traditional galvanized steel air duct. The core is to improve the blanking method of the rubber and plastic insulation board. The four sides of the insulation layer are at right angles to reduce the bonding seam. Stakeout of the rubber-plastic insulation layer of the rectangular straight air duct, according to the side length of the air duct and the thickness of the rubber-plastic plate, the combination method shown in Figure 1 is adopted for the lofting. Calculate the stakeout size according to the pre-measured air duct specifications. Use a steel ruler or a steel tape to measure on the plate according to the calculated lofting size, and draw a V-shaped groove line and a 45-degree slope line on the plate with a square aluminum alloy ruler and a paintbrush. The seams between the insulation board and the surface of the air duct reduce the number of joints and enhance the heat preservation effect of the air duct.
The paper cutter is required to tilt left and right 45°when chamfering the corner, so that the cut "V"-shaped notch is 90°, which is convenient for folding into a right angle. When cutting, the tool should be close to the ruler to ensure a straight cut and prevent cutting size errors.
3. Key points of construction operation
1. Construction preparation:
(1) The direction, coordinates, and elevation of the air ducts of each system are installed accurately, and the air leakage and light leakage of the air ducts have been tested and tested to meet the requirements.
(2) Prepare the blanking list according to the model of the system air duct.
(3) Technicians make technical disclosures to construction personnel, clarify the size and requirements of thermal insulation blanking materials, and make good work instruction records
(4) Compile the erection scheme of the on-site processing operation platform to ensure that the construction conditions meet the implementation of the scheme.
2. Wipe and clean the surface of the air duct
Use rags, paint brushes and other tools to clean up the dust or putty and other attachments on the surface of the air duct to ensure that the surface of the air duct is clean and free of debris, and will not affect the surface coating.
3. According to the size of the air duct, the material of the insulation board is cut
The blanking of the insulation board is divided into straight pipe sections, elbows, variable diameter pipes and air valve parts, etc. All of them are cut as a whole. According to the specifications of the air pipes, V-shaped groove lines and 45-degree slope lines are drawn on the plates. The four corners of the pipe are cut and butted at a 45-degree angle to ensure that there is only one adhesive seam at the bottom or top of the air pipe.
4. Glue the surface of the air duct and the plate
Insulation glue should be evenly applied on the outer surface of air ducts, components or equipment, without gaps or omissions. Brush the glue in the order of brushing the insulation material first, then brushing the surface of the air duct, and the glue film is required to be even and free of flow.
5. Rubber and plastic plate pasting
After the glue is left to stand for 2 minutes to initially set, first paste the top plate and the rubber and plastic plates on both sides, press repeatedly with a clapper to ensure that the insulation material is tightly bonded to the air duct, components or equipment, and then paste the bottom insulation plate. For irregular parts such as right-angle elbows and B-shaped bends, the four sides can be pasted separately, and the side elevations can be pressed against the upper and lower bottom surfaces.
6. Flange insulation
For the flange connection of two air ducts, add a belt to keep warm. The width of the belt should be 100mm, and it should be firmly pasted and pressed flat.
7. Inspection and acceptance
After the rubber-plastic board is pasted, check the flatness with a level ruler, and locally press the parts that exceed the deviation range to ensure the flatness of the surface. After the rubber and plastic board is pasted and repaired, it will be reported to the supervisory unit for acceptance after self-inspection by the project department.
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HVAC Ductwork Fabrication
1. Scope of application
This construction method is applicable to the rubber and plastic insulation construction of rectangular metal air ducts in various types of air-conditioning and ventilation systems.
2. Process principle
This construction method is formed by improving the rubber and plastic insulationof the traditional galvanized steel air duct. The core is to improve the blanking method of the rubber and plastic insulation board. The four sides of the insulation layer are at right angles to reduce the bonding seam. Stakeout of the rubber-plastic insulation layer of the rectangular straight air duct, according to the side length of the air duct and the thickness of the rubber-plastic plate, the combination method shown in Figure 1 is adopted for the lofting. Calculate the stakeout size according to the pre-measured air duct specifications. Use a steel ruler or a steel tape to measure on the plate according to the calculated lofting size, and draw a V-shaped groove line and a 45-degree slope line on the plate with a square aluminum alloy ruler and a paintbrush. The seams between the insulation board and the surface of the air duct reduce the number of joints and enhance the heat preservation effect of the air duct.
The paper cutter is required to tilt left and right 45°when chamfering the corner, so that the cut "V"-shaped notch is 90°, which is convenient for folding into a right angle. When cutting, the tool should be close to the ruler to ensure a straight cut and prevent cutting size errors.
3. Key points of construction operation
1. Construction preparation:
(1) The direction, coordinates, and elevation of the air ducts of each system are installed accurately, and the air leakage and light leakage of the air ducts have been tested and tested to meet the requirements.
(2) Prepare the blanking list according to the model of the system air duct.
(3) Technicians make technical disclosures to construction personnel, clarify the size and requirements of thermal insulation blanking materials, and make good work instruction records
(4) Compile the erection scheme of the on-site processing operation platform to ensure that the construction conditions meet the implementation of the scheme.
2. Wipe and clean the surface of the air duct
Use rags, paint brushes and other tools to clean up the dust or putty and other attachments on the surface of the air duct to ensure that the surface of the air duct is clean and free of debris, and will not affect the surface coating.
3. According to the size of the air duct, the material of the insulation board is cut
The blanking of the insulation board is divided into straight pipe sections, elbows, variable diameter pipes and air valve parts, etc. All of them are cut as a whole. According to the specifications of the air pipes, V-shaped groove lines and 45-degree slope lines are drawn on the plates. The four corners of the pipe are cut and butted at a 45-degree angle to ensure that there is only one adhesive seam at the bottom or top of the air pipe.
4. Glue the surface of the air duct and the plate
Insulation glue should be evenly applied on the outer surface of air ducts, components or equipment, without gaps or omissions. Brush the glue in the order of brushing the insulation material first, then brushing the surface of the air duct, and the glue film is required to be even and free of flow.
5. Rubber and plastic plate pasting
After the glue is left to stand for 2 minutes to initially set, first paste the top plate and the rubber and plastic plates on both sides, press repeatedly with a clapper to ensure that the insulation material is tightly bonded to the air duct, components or equipment, and then paste the bottom insulation plate. For irregular parts such as right-angle elbows and B-shaped bends, the four sides can be pasted separately, and the side elevations can be pressed against the upper and lower bottom surfaces.
6. Flange insulation
For the flange connection of two air ducts, add a belt to keep warm. The width of the belt should be 100mm, and it should be firmly pasted and pressed flat.
7. Inspection and acceptance
After the rubber-plastic board is pasted, check the flatness with a level ruler, and locally press the parts that exceed the deviation range to ensure the flatness of the surface. After the rubber and plastic board is pasted and repaired, it will be reported to the supervisory unit for acceptance after self-inspection by the project department.
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Address : No.3, Hongcha Road, Yinghong Industrial Zone, Yingde, Qingyuan, Guangdong, China.
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