Veza

Have Working wheel left and right rotation with specially shaped blades curved back. The spiral housing is rotary. Fans are manufactured in 1st and 5th design diagram according to GOST 5976. Fans are installed in stationary air conditioning, ventilation and air heating industrial, public and residential buildings.

VRAN ® - V fans RA dial with curved N rear wheel blades, with high efficiency and low noise level.

VRAN fans are manufactured in the following versions:

• general industrial (N)
• heat resistant (W)
• corrosion resistant (K1)
• corrosion-heat-resistant (K1Zh)
• explosion-proof (B) - only according to the 1st design scheme
• explosion-proof heat-resistant (VZh) - only according to the 1st design scheme
• explosion-proof, corrosion-resistant (VK1; VK3) - only according to the 1st design scheme
• explosion-proof, corrosion- and heat-resistant (VK1Zh) - only according to the 1st design scheme
• earthquake-resistant (C) - for each of the above versions.

Fans available on request VRAN in a noise-insulating casing(manufactured for general industrial use and housing positions of 0 and 90 degrees) allows you to reduce the total sound power level by up to 12 dB, emitted by the fan, due to the noise-absorbing and sound-insulating properties of the casing. Total level sound pressure decreases by 25...30dB at a distance of 5m.

Additional fan kit available VRAN vibration isolators and flexible inserts, which reduce dynamic loads, as well as return flanges and frequency converters.

Execution 1.The fan impeller is mounted directly on the electric motor shaft.

Vent ilyatorsaccording to the 1st design scheme, there are two modifications VRAN6 and VRAN9, differing in the number of impeller blades.

Aerodynamic characteristics of VRAN6 and VRAN9 fans.Version 1

Version 1P (with frequency regulation)

Dimensions and connecting dimensions VRAN6, VRAN9. Execution 1. Execution 1P:

Execution 5. The shaft with the impeller is mounted in two bearings and connected to the electric motor by a V-belt drive.

Fans according to the 5th design scheme (with a belt drive) have one modification - VRAN9.

Aerodynamic characteristics of VRAN9 fans.Version 5

Overall and connection dimensions of VRAN9. Version 5:

Designation structure for VRAN fans:

fans vran

Order radial fans with backward-curved blades VRAN from the VENTKOMPLEKS Company:

All fans are produced using modern, high-tech equipment. Welding of wheels is carried out using a robot welder. All fan casings are made as standard from galvanized steel using rolling technology.

Fans VRAN® They are manufactured in 16 standard sizes and provide a wide range of performance modes from 300 to 120,000 m3/h and pressure up to 2600 Pa. VRAN fans are used in systems where high efficiency is required, low level noise and in systems with parallel operation of several fans. According to their own technical parameters These fans correspond to the best foreign models, completely replace the well-known series of Russian fans VTs 4-70, VR 80-75, VR 86-77 and have better performance compared to them whole line advantages:

1. Fans are produced with two modifications of impellers VRAN6 and VRAN9, differing in the number of blades, and are made with a dense standard range of R20 wheel diameters. This allows you to abandon the use of previously manufactured modifications of fans with intermediate impeller diameters and choose optimal fan to almost any given mode with minimal reserves up to 5%.

2. Several options have been introduced - classes of wheel design depending on the value of the peripheral speed, which provide reliable operation fans during the entire period of their operation. The strength calculations of the impellers using the finite element method were fully confirmed by relevant experiments.

3. Power reserves have been optimized when choosing motors, which allows the use of motors with lower installed power, especially for small fans.

4. All types of fans are designed according to the first design scheme using frequency converters, which makes it possible to adjust the fan operating mode during commissioning tests and during operation. A selection methodology has been developed optimal type motor operating with a frequency converter, and the possible range of current frequency changes.

5. With a simpler design of the wheel and seal assembly between the wheel and the inlet pipe due to the precision of manufacturing and quality technology assembly ensures high aerodynamic parameters of serial products.

6. A denser range of R20 impeller diameters has been introduced for small fans, which are most widely used as built-in ones in various installations.

7. Power reserves have been optimized when choosing motors, which allows the use of motors with lower installed power, especially for small fans.

8. The shape of the volute casing has been changed - the size of the outlet flange has been increased, which ensures a reduction average speed in the outlet section of the fan and pressure losses in the connected ventilation network. Reducing the fan outlet speed also increases the static pressure of the fan.

For getting quick calculation radial fans VRANsend your request to e-mail: . VENTCOMPLEX Company specialists have necessary programs selection ventilation equipment, incl. radial fans.

Fans are installed in stationary air conditioning, ventilation and air heating systems of industrial, public and residential buildings.

To move gas-air mixtures with temperatures up to 400 °C and up to 600 °C for at least 120 minutes, fans are manufactured in a special VRAN-DU design.

Design version 5th - standard sizes: 630; 800; 1000; 1250.
Design version 1st - standard sizes: 250; 280; 315; 355; 400; 450; 500; 560; 630; 710; 800; 900; 1000; 1120; 1250; 1400.

Fans are produced according to TU 4861104401491532007.
Fans are certified and certified for use in hazardous industries.

Possible executions

• general industrial (N)
• heat resistant (W)
• corrosion resistant (K1)
• corrosion-heat-resistant (K1Zh)
• explosion-proof (B) - only according to the 1st design scheme
• explosion-proof heat-resistant (VZh) - only according to the 1st design scheme
• explosion-proof, corrosion-resistant (VK1; VK3) - only according to the 1st design scheme
• explosion-proof, corrosion-heat-resistant (VK1Zh) - only according to the 1st design scheme
• earthquake-resistant (C) - for each of the above versions

Design and use of VRAN9-9

The fans have a left- and right-hand rotation impeller with specially shaped backward-curved blades. The spiral housing is rotary.

Fans are manufactured according to the 1st and 5th design scheme in accordance with GOST 5976.

• According to the 1st design scheme (with direct connection to the engine), there are two modifications VRAN6 and VRAN9, differing in the number of impeller blades.
• According to the 5th design scheme (with a belt drive) they have one modification - VRAN9.
• For VRAN9 according to the 1st design scheme, it is proposed to be equipped with motors that allow frequency control of the rotation speed.

Fans must be installed outside the serviced premises and outside the area of ​​permanent residence of people. Fans can be operated in moderate conditions (U); temperate and cold (UHL) and tropical (T) climates of the 1st and 2nd category of accommodation according to GOST 15150. For climatic version U1, UHL1, T1 is provided additional protection drive and exhaust fan from atmospheric precipitation.

The design of fans in a noise-insulating casing (manufactured for general industrial design and casing positions of 0 and 90 degrees) allows you to reduce the total level of sound power emitted by the fan by up to 12 dB due to the noise-absorbing and noise-insulating properties of the casing. The total sound pressure level is reduced by 25...30 dB at a distance of 5 m. Additional equipment is offered with vibration isolators and flexible inserts, which reduce dynamic loads, as well as return flanges, frequency converters and devices soft start.

Temperature environment

• from minus 45 to +40 °C

For temperate climates,

• from minus 60 to +40 °C for moderate and cold climates,
• from minus 10 to +50 °C

For tropical climates;
the average vibration velocity of external vibration sources at the fan installation sites is no more than 2 mm/s

Designation Veza VRAN9-9

VRAN9-9 aerodynamics

VRAN-DU 6.3 fans are installed in special exhaust systems to remove gases arising from a fire and at the same time remove heat outside the room, they can move gas-air mixtures with temperatures up to 400°C and up to 600°C for at least 120 minutes. At the same time, localization of the fire zone is ensured and the possibility of carrying out fire fighting and rescuing people and equipment is created.

According to the 1st design scheme, fans are manufactured in the following standard sizes: 5; 6.3; 8.

According to the 5th design scheme, fans are manufactured in the following sizes: 6.3; 8; 10; 12.5.

Manufacturing options

general industrial (N)
corrosion resistant (K1)
explosion-proof (B) - only according to the 1st design scheme
explosion-proof, corrosion-resistant (VK1) - only according to the 1st design scheme

Design

VRAN-DU 6.3 fans have a drum-type impeller of left or right rotation with 32 forward-curved blades. The spiral housing is rotary. The inlet pipe has cylindrical shape and does not enter the impeller, which ensures reliable operation of the fan at high temperature moving environment.

The VRAN-DU 6.3 version of fans in a noise-insulating casing (manufactured for general industrial design and casing positions of 0 and 90 degrees) allows you to reduce the total level of sound power emitted by the fan by up to 12 dB due to the noise-absorbing and noise-insulating properties of the casing. The total sound pressure level decreases by 25...30 dB at a distance of 5 m.

Additional equipment is offered with vibration isolators and flexible inserts, which reduce dynamic loads, as well as return flanges and an automation cabinet.

Exploitation

Fans must be installed outside the serviced premises and outside the area of ​​permanent residence of people.

Fans can be operated in moderate conditions (U); temperate and cold (UHL) and tropical (T) climates of the 1st and 2nd categories of placement according to GOST 15150.

terms of Use

ambient temperature
from minus 45 to +40°С for temperate climates,
from minus 60 to +40°С for moderate and cold climates,
from minus 10 to +50°С for tropical climates;

the average vibration velocity of external vibration sources at the fan installation sites is no more than 2 mm/s;

The fans are certified and have permission for use in explosive and chemically hazardous industries and facilities.

Fan device

• Type sizes: 400-1250 mm - 1st version;
• Type sizes: 630-1250 mm - 5th version;
• 400°C; 600°C - 120 min;
• General industrial;
• Corrosion resistant;
• Explosion-proof;
• The family of air exhaust fans has been expanded - fans operating in general exhaust mode (in addition to the emergency mode of remote control);
• Modification of fans with VFD;
• Use of motors with increased efficiency as required by IE2 or IE3

Veza VRAN6-071-DU fans have a left- or right-hand rotation impeller with specially shaped backward-curved blades that provide high efficiency and low noise.

The spiral housing is rotary. It is possible to operate the fans in the smoke removal mode (SD) and in the combined smoke removal and ventilation mode (SUV). In the latter case, the fans are equipped with motors for long-term permanent job.

The fans are equipped with standard 3-phase asynchronous single-speed motors. For VRAN9 fans according to the 1st design scheme, it is possible to equip them with motors that allow frequency regulation of the rotation speed.

For housing position P0 and LO for the 1st category of placement (outdoor), protection from atmospheric precipitation ZONT-VRAN is provided (ordered separately as an option).

Operating operating temperature Veza VRAN6-071-DU

Veza VRAN6-071-DU fans must be installed outside the serviced premises and outside the area of ​​permanent residence of people.
Fans can be operated in moderate conditions (U); temperate and cold (UHL) and tropical (T) climates of the 1st and 2nd categories of placement according to GOST 15150.

• ambient temperature
  - from minus 45 to +40°С for temperate climates,
  - from minus 60 to +40°С for moderate and cold climates,
  - from minus 10 to +50°С for tropical climates;
• the average vibration velocity of external vibration sources at the fan installation sites is no more than 2 mm/s.

Name and designation Veza VRAN-DU

VRAN-DU performance chart

Design and dimensions

On request we supply the kit

• Thermal and noise insulating casing TShK
• Soft connector COM-VRAN
• Protection ZONT-VRAN
• Cabinet ShSAU
• Vibration isolators
• Reverse flange - FOV - FON
• Frequency converter
• Soft starter

The VEZA plant is the largest manufacturer of ventilation equipment in Russia, including such products as centrifugal fan general industrial purposes. Centrifugal fan series VR-80-75 or VRAN - this is the original name VEZA, VTs-14-46 or VRAV - is used in ventilation, air conditioning and air heating systems for various purposes.

Radial fans VRAN-DU and VRAV-DU are installed in special exhaust hoods ventilation systems to remove gases arising from a fire and simultaneously remove heat outside the room. At the same time, localization of the fire zone is ensured and the possibility of carrying out fire fighting and rescuing people and equipment is created. The units can move gas-air mixtures with temperatures of 400°C and 600°C for at least 120 minutes.

Centrifugal fan VR-80-75 - replacement with a VRAN fan at the request of the Buyer.

VRAN fans low pressure are manufactured in general industrial, heat-resistant, corrosion-resistant, northern and explosion-proof versions. The impellers of such a fan contain 9 or 6 backward-curved blades. Thanks to a wide range of standard sizes and two types of impellers, the centrifugal fan very tightly covers the operating points for the main ventilation tasks.

The centrifugal fan VRAN is manufactured according to the 1st (with direct connection to the engine) and 5th (with a belt drive) design design schemes. Capacity from 1000 m³/h to 100,000 m³/h, total pressure from 100 Pa to 1800 Pa.

The VRAN centrifugal fan is used in systems that require high efficiency, low noise levels and in systems with parallel operation of several fans.

Fan VRAN9

Low-pressure fans VRAN6 and VRAN9 are used to move gas and steam-air mixtures, which can also include explosive ones. The units are used in stationary ventilation and air conditioning systems, as well as in air heating systems for public, industrial and residential buildings, as well as for industrial and sanitary purposes.

• Fans that meet the first design scheme are produced in 16 standard sizes.
• Fans that meet the fifth design scheme are manufactured in four standard sizes.
• Produced in accordance with TU 4861-105-40149153-2007;
• Certified and certified for work in explosive industries.

VRAN6 and VRAN9 are produced in the following versions, according to operating conditions:

• according to the first and fifth design scheme:

1. general industrial (N);
2. corrosion resistant (K);
3. heat-resistant (W);
4. corrosion-heat-resistant (K1Zh).

• according to the first design scheme:

1. explosion-proof (B);
2. explosion-proof, corrosion-resistant (VK1);
3. explosion-proof, corrosion-resistant (VK3);
4. explosion-proof heat-resistant (VZh);
5. explosion-proof, corrosion-heat-resistant (VK1Zh);
6. earthquake-resistant (C).

VRAN fans can be operated in the following weather and climatic conditions:

• temperate climate (U). The ambient temperature is from -45 to + 40 °C and the average value for the vibration velocity of external vibration generators at the installation site of the VRAN fan is no more than 2 mm/s.
• temperate and cold climates (UCL). Ambient temperature from -60 to +40 °C and the average value for the vibration velocity of external vibration generators at the installation site of the VRAN fan is no more than 2 mm/s.
• tropical climate (T). Ambient temperature from -10 to +50 °C and the average value for the vibration velocity of external vibration generators at the installation site of the VRAN fan is no more than 2 mm/s.

Advantages of VRAN9 fans:

the installed power of the motors per fan has been reduced;

Dimensions and weight are reduced;

used new technology manufacturing the body from galvanized steel;

proposed additional options on the use of flexible rates and vibration isolators;

a new, denser standard size series R20, accepted in the world, was introduced;

the outlet opening has been enlarged in accordance with European Standards.

Fans VRAN-DU

Fan VRAN-DU has a left- or right-hand rotation impeller with specially shaped backward-curved blades, ensuring high efficiency and low noise. The spiral housing is rotary. All standard sizes of fans are manufactured according to design scheme 1 (with direct connection to the motor). Fans No. 4 are manufactured according to design scheme 5 (with belt drive); 5; 6.3; 8; 10 and 12.5.

The fan impellers are made of St3 steel (for temperatures up to 400°C) and 12Х18Н10Т steel (for temperatures up to 600°C) with a heat-resistant paint and varnish coating. Thermal protection of bearing units ensures reliable operation of the fan when moving hot gases.

VRAN-DU fans for supply smoke ventilation systems are installed in special supply systems smoke removal to create overpressure(support) in staircases, airlock vestibules and elevator shafts of buildings to prevent smoke from penetrating into these rooms and to create the possibility of carrying out fire fighting work and rescuing people and equipment.