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Due to the most modern equipment company Ventservis produces high-quality circular and rectangular ducts (pipes), fittings, stainless steel, mounting the tire and the ventilation profile. With our products you can quickly and economically to mount a strong and sealed ventilation system. Ducts with round and rectangular cross-section designed for air circulation. Created from stainless steel or aluminum ducts provide strength and rigidity of the whole ventilation system. Of the two types of cross round air at times reliable and practical than the rectangular, and therefore used much more often.
The connection between the pipe flange, using rivets and sealing materials. But when creating complex ducts, bends, junctions, branches widely used shapes, which are enhancements of ventilation systems. Round or rectangular shapes are made of galvanized iron or welded steel, and sizes are identical to those proposed in the directory blower. Another set of ventilation systems is the mounting rail (shinoreyka) for flanged connections. Shinoreyka provides not only increased tightness, but also very high stability of the compounds of ventilation. During the assembly shinoreyka can significantly save time and insulation for pipes, and upon completion of all works flanges with rubber mounting further seal sealant for greater reliability.
We also offer a metal vent profile for ease of installation of ventilation systems. Strong corners of stainless steel are used for fastening parts at right angles to each other.Ventilation profile, produced by "Ventservis, meets the highest standards of operation, and, very importantly, is compatible with the elements of the ventilation systems of foreign origin.
 
The company "Ventservis offers ducts, which are produced on CNC Swiss firm Tormec, known for its quality approach to manufacturing of ventilation systems. VentService launched on the Ukrainian market of air ducts for rectangular and circular channels, fittings for them, silencers, fans, air valves, a variety of filters. In general, the full range of products needed for long-lasting maximum economical and reliable ventilation.

Round duct

In most cases, rectangular ducts can be replaced by a round without increasing footprint and more profitable in monetary terms. Circular ducts can withstand more pressure due to its strong natural shape. And if you add a scroll frame, for example, 4-layer weld seam to a very rigid structure. Diameters over 315 mm. zigovku possible to use, it also gives rigidity. Galvanized steel is more durable. With the help of fittings to create any configuration of ventilation networks. This is a fairly quick and easy, just slightly turning from side to side, little effort pushed into the molded part in the straight section and put 3 - 4 rivets around the perimeter of the joint. As a result, a high-quality aerodynamics of air flow.

Rectangular ducts
Rectangular cross-section is recommended for larger sizes of duct, more than 300 mm.The thickness of sheet steel shall comply with all the parameters in general: up to 300 mm. - 0, 5 mm.; Of 300 mm. to 800 mm. - 0, 7 mm.; Of 800 mm. up to 1250 mm. - 1, 00 mm. To connect the elements of ventilation systems to each other, joining rectangular ducts to the various units and stiffening at the junction of the connecting rail set with angular elements.
 
Ducts are available with different diameters: 100, 125, 160, 200, 315, 400, 500, 630, 800, 1000, 1250 mm. Length and diameter can change at the request of the customer.The company "Ventservis, offers you a comprehensive solution to the problem of spiral duct and ventilation profile. All ventilation products are manufactured by Swiss equipment, world-famous firm Tormec. That ensures rapid production and the exceptional quality of air.
In this article, we announced just a few benefits of using spiral-wound duct. Let's start with ...
The cost of installation

The cost of on-site ducts of circular cross section is approximately 65% of the value of a rectangular duct.
 
Instead of a rectangular duct is possible to use two circular ducts, which also implies a lower overall cost. In certain cases, even the use of more than two circular ducts can cost less than using a rectangular duct.
 
Also, the use of two or more circular ducts instead of duct of rectangular cross section provides advantages in terms of better regulation of air flow, a simplistic linking duct pressure and more flexible partition fire zones.
 
For several reasons, the duct system of circular cross section have a lower cost than the rectangular cross-section: circular duct system consists of fewer components and are smaller, making circular ducts and fittings for them to be more automated and increased quality control, installation of air round takes less time, sometimes 2 - 3 times than the installation of a similar system of rectangular cross section.
 
Within the same space, without affecting the pressure drop across the duct of rectangular cross section 250h200 mm can be replaced by a circular ducts with a diameter of 250 mm.

Without using extra space rectangular ducts can often replace several circular ducts.
The cost of insulation below due to the fact that the volume of the required insulation material was low because of the shorter perimeter Round duct compared to duct of rectangular cross section. For example, a circular ducts with a diameter of 500 mm requires about 13% less insulation than the equivalent rectangular duct 500h400 mm.

If you use a thinner layer of insulation circular ducts, compared with air ducts of rectangular cross section is achieved by the same heat loss.

Round duct system more accessible and thus more suitable for insulation works.
Properties that affect the damping of vibrations in systems of circular section marked better, mainly due to a higher degree of rigidity.

The cost of on-site (including packaging, transportation, waste management, etc.) are significantly lower when using the circular ducts than using duct of rectangular cross section with the same size section. All systems are designed for air flow 1800 m3 / h.Shows the highest and lowest values of pressure drop and maximum speed.
 
Reduced number and reduced size of the outboard bearing ducts. The distance between the two outboard legs duct of rectangular cross section is 2,5 m, and for Round duct - 3 m, thus decreasing the number of outboard supports, the cost and time required for the installation of approximately 20%.
 
Round duct often involves improving the regulation of air distribution.
 
Shipping and warehousing
 
Due to standardization, the diameters of round duct, as the next step, increasing by about 25% in geometric progression. Consequently, the warehouse can store a wide range of fittings and air ducts. Thus, they can be quickly delivered, which facilitates the construction of the facility.

 
Space for installation
 
Space required for mounting circular ducts, often less space required for ducts of rectangular cross section with the same pressure drop. The design of the connection ducts of rectangular cross section requires the installation of additional space. It must provide, first, to the projections above the surface of air ducts, which form the flanges of the duct system. Secondly, you want enough space to connect the flanges with the bolts with nuts and clips.
 
Often in confined spaces, such as when installing ductwork above the suspended ceiling in the corridor or in the mine air ducts are only one side (end). Due to the impossibility of applying mastic or tape on the inside connected sites have serious problems.
This not only increases the cost of installation and increases the time needed to perform the work, but also reduces the quality of the air-duct system.
 
Pressure drop
 
The pressure drop in the ventilation system determines the required fan power and influence, respectively, on energy consumption.
Pressure drop for a typical system that includes a combination of straight sections of air ducts, branches and cones in the ventilation system of circular cross section is usually lower than in the systems of rectangular cross section. This implies the reduction of operating costs for the system of circular cross section.
 
Air purification
 
A survey of ventilation systems in buildings with the classification of "patients" have shown that dust, mold, etc., accumulate in the feed and exhaust ducts, increasing the pressure release ventilation and thus exacerbate the problem of "disease" of the building. Building regulations require to make regular inspections of the duct system and, if appropriate, their internal cleaning.
Methods for cleaning (dry or wet), cleaning tools (rotating brushes, combined with powerful vacuum cleaners) are used for internal cleaning of ducts, more convenient and cheaper for use in circular ducts, than when using a rectangular duct due to, for example, standard diameters circular ducts.
 
Soundproofing
 
The modern design of air ducts, including air-conditioning system with variable and constant flow of air, has specific properties that are known to pose serious difficulties in terms of noise. In all cases, this low-frequency noise, which is intractable problem, since it easily penetrates through the wall of a rectangular duct in the ceiling.
The problem of noise breakout could be largely eliminated by using circular ducts are more rigid than rectangular ducts and, thereby, reducing the level of penetration through the wall of the duct.
 
Where the characteristics of air flow involve the use of duct diameter greater than the value that is suitable for installation on a site with a suspended ceiling, use a few smaller diameter ducts. The use of conventional rectangular ducts will lead to noise problems at the stage of commissioning.
 
Strength
 
Circular ducts are usually made of flat steel 137 mm, attached to the folded seam shaping a perfect circular cross section (see below). The applied method gives each duct stiffness, reducing the need for additional stiffeners.

The pressure vacuum

In the installed system, where the pressure from atmospheric pressure is extremely low, there is a risk of destruction of ventilation ducts. This phenomenon is known as buckling and occurs without prior manifestations at the weakest point in the system. Buckling propagates along the duct and with increasing pressure vacuum it leads to a complete flattening. The weakest point is often a "transitional depression" duct. The histogram shows the maximum pressure vacuum, which can withstand the intact spiral-wound duct without breaking.
 
Positive pressure
 
Risk of rupture of ventilation tubes as a result of the positive pressure is much lower than the risk of fracture because of low pressure vacuum. At a certain positive pressure is also possible cracks in the joints between the duct before the complete destruction of the duct in place seam weld.
 
Due to the fact that the compounds can be fastened securely, the duct is torn along the seam weld. The histogram shows the maximum positive pressure, which can withstand without breaking the intact duct.
 
Graphs are constructed according to the protocol of certification tests № 100/36-1624 on 22/11/2005, issued by an independent government agency for testing IC NIIK OKBM.
 
Summary
The advantages of circular ducts are significant and have the effect, which was and is the cause of many changes in the traditional areas of development throughout Europe, as well as in Ukraine.
 
This can be illustrated by the example of Europe where there has been a similar development.
1. 1965. previously.
Contractors work on the ducts was performed manufacture and installation of ventilation ducts with rectangular cross section.


2. 1966 - 1975.

Certain specialized firms have begun mass production of air ducts and fittings, circular cross section. Contractors work on air ducts have started to fly round that set along with the air ducts of rectangular cross section, manufactured in their own shops.
 
3. 1976 - 1985.
There has been a complete change of environment during the MDM specialists - producers have raised their level of automation, research and development.

4. 1986-2005.
During this period, the contractors began work on the ducts find materials to specialized suppliers at a lower price than the price of products produced by himself. Contractors are gradually focusing their resources on the installation of a standardized pre-made product that was available on demand. These changes occurred due to the ability of producers to adapt their production structure in relation to the system that provides a significant competitive advantage. Engineers have changed their designs and specifications and have moved from individual projects to ventilation systems for each building to the construction projects taking into account the standardized plan.
 
International comparisons is the following picture of the actual market share of systems circular ducts and dynamics.
Due to the most modern equipment company Ventservis produces high-quality circular and rectangular ducts (pipes), fittings, stainless steel, mounting the tire and the ventilation profile. With our products you can quickly and economically to mount a strong and sealed ventilation system. Ducts with round and rectangular cross-section designed for air circulation. Created from stainless steel or aluminum ducts provide strength and rigidity of the whole ventilation system. Of the two types of cross round air at times reliable and practical than the rectangular, and therefore used much more often.
The connection between the pipe flange, using rivets and sealing materials. But when creating complex ducts, bends, junctions, branches widely used shapes, which are enhancements of ventilation systems. Round or rectangular shapes are made of galvanized iron or welded steel, and sizes are identical to those proposed in the directory blower. Another set of ventilation systems is the mounting rail (shinoreyka) for flanged connections. Shinoreyka provides not only increased tightness, but also very high stability of the compounds of ventilation. During the assembly shinoreyka can significantly save time and insulation for pipes, and upon completion of all works flanges with rubber mounting further seal sealant for greater reliability.
We also offer a metal vent profile for ease of installation of ventilation systems. Strong corners of stainless steel are used for fastening parts at right angles to each other.Ventilation profile, produced by "Ventservis, meets the highest standards of operation, and, very importantly, is compatible with the elements of the ventilation systems of foreign origin.
 
The company "Ventservis offers ducts, which are produced on CNC Swiss firm Tormec, known for its quality approach to manufacturing of ventilation systems. VentService launched on the Ukrainian market of air ducts for rectangular and circular channels, fittings for them, silencers, fans, air valves, a variety of filters. In general, the full range of products needed for long-lasting maximum economical and reliable ventilation.

Round duct

In most cases, rectangular ducts can be replaced by a round without increasing footprint and more profitable in monetary terms. Circular ducts can withstand more pressure due to its strong natural shape. And if you add a scroll frame, for example, 4-layer weld seam to a very rigid structure. Diameters over 315 mm. zigovku possible to use, it also gives rigidity. Galvanized steel is more durable. With the help of fittings to create any configuration of ventilation networks. This is a fairly quick and easy, just slightly turning from side to side, little effort pushed into the molded part in the straight section and put 3 - 4 rivets around the perimeter of the joint. As a result, a high-quality aerodynamics of air flow.

Rectangular ducts
Rectangular cross-section is recommended for larger sizes of duct, more than 300 mm.The thickness of sheet steel shall comply with all the parameters in general: up to 300 mm. - 0, 5 mm.; Of 300 mm. to 800 mm. - 0, 7 mm.; Of 800 mm. up to 1250 mm. - 1, 00 mm. To connect the elements of ventilation systems to each other, joining rectangular ducts to the various units and stiffening at the junction of the connecting rail set with angular elements.
 
Ducts are available with different diameters: 100, 125, 160, 200, 315, 400, 500, 630, 800, 1000, 1250 mm. Length and diameter can change at the request of the customer.The company "Ventservis, offers you a comprehensive solution to the problem of spiral duct and ventilation profile. All ventilation products are manufactured by Swiss equipment, world-famous firm Tormec. That ensures rapid production and the exceptional quality of air.
In this article, we announced just a few benefits of using spiral-wound duct. Let's start with ...
The cost of installation

The cost of on-site ducts of circular cross section is approximately 65% of the value of a rectangular duct.
 
Instead of a rectangular duct is possible to use two circular ducts, which also implies a lower overall cost. In certain cases, even the use of more than two circular ducts can cost less than using a rectangular duct.
 
Also, the use of two or more circular ducts instead of duct of rectangular cross section provides advantages in terms of better regulation of air flow, a simplistic linking duct pressure and more flexible partition fire zones.
 
For several reasons, the duct system of circular cross section have a lower cost than the rectangular cross-section: circular duct system consists of fewer components and are smaller, making circular ducts and fittings for them to be more automated and increased quality control, installation of air round takes less time, sometimes 2 - 3 times than the installation of a similar system of rectangular cross section.
 
Within the same space, without affecting the pressure drop across the duct of rectangular cross section 250h200 mm can be replaced by a circular ducts with a diameter of 250 mm.

Without using extra space rectangular ducts can often replace several circular ducts.
The cost of insulation below due to the fact that the volume of the required insulation material was low because of the shorter perimeter Round duct compared to duct of rectangular cross section. For example, a circular ducts with a diameter of 500 mm requires about 13% less insulation than the equivalent rectangular duct 500h400 mm.

If you use a thinner layer of insulation circular ducts, compared with air ducts of rectangular cross section is achieved by the same heat loss.

Round duct system more accessible and thus more suitable for insulation works.
Properties that affect the damping of vibrations in systems of circular section marked better, mainly due to a higher degree of rigidity.

The cost of on-site (including packaging, transportation, waste management, etc.) are significantly lower when using the circular ducts than using duct of rectangular cross section with the same size section. All systems are designed for air flow 1800 m3 / h.Shows the highest and lowest values of pressure drop and maximum speed.
 
Reduced number and reduced size of the outboard bearing ducts. The distance between the two outboard legs duct of rectangular cross section is 2,5 m, and for Round duct - 3 m, thus decreasing the number of outboard supports, the cost and time required for the installation of approximately 20%.
 
Round duct often involves improving the regulation of air distribution.
 
Shipping and warehousing
 
Due to standardization, the diameters of round duct, as the next step, increasing by about 25% in geometric progression. Consequently, the warehouse can store a wide range of fittings and air ducts. Thus, they can be quickly delivered, which facilitates the construction of the facility.

 
Space for installation
 
Space required for mounting circular ducts, often less space required for ducts of rectangular cross section with the same pressure drop. The design of the connection ducts of rectangular cross section requires the installation of additional space. It must provide, first, to the projections above the surface of air ducts, which form the flanges of the duct system. Secondly, you want enough space to connect the flanges with the bolts with nuts and clips.
 
Often in confined spaces, such as when installing ductwork above the suspended ceiling in the corridor or in the mine air ducts are only one side (end). Due to the impossibility of applying mastic or tape on the inside connected sites have serious problems.
This not only increases the cost of installation and increases the time needed to perform the work, but also reduces the quality of the air-duct system.
 
Pressure drop
 
The pressure drop in the ventilation system determines the required fan power and influence, respectively, on energy consumption.
Pressure drop for a typical system that includes a combination of straight sections of air ducts, branches and cones in the ventilation system of circular cross section is usually lower than in the systems of rectangular cross section. This implies the reduction of operating costs for the system of circular cross section.
 
Air purification
 
A survey of ventilation systems in buildings with the classification of "patients" have shown that dust, mold, etc., accumulate in the feed and exhaust ducts, increasing the pressure release ventilation and thus exacerbate the problem of "disease" of the building. Building regulations require to make regular inspections of the duct system and, if appropriate, their internal cleaning.
Methods for cleaning (dry or wet), cleaning tools (rotating brushes, combined with powerful vacuum cleaners) are used for internal cleaning of ducts, more convenient and cheaper for use in circular ducts, than when using a rectangular duct due to, for example, standard diameters circular ducts.
 
Soundproofing
 
The modern design of air ducts, including air-conditioning system with variable and constant flow of air, has specific properties that are known to pose serious difficulties in terms of noise. In all cases, this low-frequency noise, which is intractable problem, since it easily penetrates through the wall of a rectangular duct in the ceiling.
The problem of noise breakout could be largely eliminated by using circular ducts are more rigid than rectangular ducts and, thereby, reducing the level of penetration through the wall of the duct.
 
Where the characteristics of air flow involve the use of duct diameter greater than the value that is suitable for installation on a site with a suspended ceiling, use a few smaller diameter ducts. The use of conventional rectangular ducts will lead to noise problems at the stage of commissioning.
 
Strength
 
Circular ducts are usually made of flat steel 137 mm, attached to the folded seam shaping a perfect circular cross section (see below). The applied method gives each duct stiffness, reducing the need for additional stiffeners.

The pressure vacuum

In the installed system, where the pressure from atmospheric pressure is extremely low, there is a risk of destruction of ventilation ducts. This phenomenon is known as buckling and occurs without prior manifestations at the weakest point in the system. Buckling propagates along the duct and with increasing pressure vacuum it leads to a complete flattening. The weakest point is often a "transitional depression" duct. The histogram shows the maximum pressure vacuum, which can withstand the intact spiral-wound duct without breaking.
 
Positive pressure
 
Risk of rupture of ventilation tubes as a result of the positive pressure is much lower than the risk of fracture because of low pressure vacuum. At a certain positive pressure is also possible cracks in the joints between the duct before the complete destruction of the duct in place seam weld.
 
Due to the fact that the compounds can be fastened securely, the duct is torn along the seam weld. The histogram shows the maximum positive pressure, which can withstand without breaking the intact duct.
 
Graphs are constructed according to the protocol of certification tests № 100/36-1624 on 22/11/2005, issued by an independent government agency for testing IC NIIK OKBM.
 
Summary
The advantages of circular ducts are significant and have the effect, which was and is the cause of many changes in the traditional areas of development throughout Europe, as well as in Ukraine.
 
This can be illustrated by the example of Europe where there has been a similar development.
1. 1965. previously.
Contractors work on the ducts was performed manufacture and installation of ventilation ducts with rectangular cross section.


2. 1966 - 1975.

Certain specialized firms have begun mass production of air ducts and fittings, circular cross section. Contractors work on air ducts have started to fly round that set along with the air ducts of rectangular cross section, manufactured in their own shops.
 
3. 1976 - 1985.
There has been a complete change of environment during the MDM specialists - producers have raised their level of automation, research and development.

4. 1986-2005.
During this period, the contractors began work on the ducts find materials to specialized suppliers at a lower price than the price of products produced by himself. Contractors are gradually focusing their resources on the installation of a standardized pre-made product that was available on demand. These changes occurred due to the ability of producers to adapt their production structure in relation to the system that provides a significant competitive advantage. Engineers have changed their designs and specifications and have moved from individual projects to ventilation systems for each building to the construction projects taking into account the standardized plan.
 
International comparisons is the following picture of the actual market share of systems circular ducts and dynamics.
Due to the most modern equipment company Ventservis produces high-quality circular and rectangular ducts (pipes), fittings, stainless steel, mounting the tire and the ventilation profile. With our products you can quickly and economically to mount a strong and sealed ventilation system. Ducts with round and rectangular cross-section designed for air circulation.