VC 4-75 VZ #2.5 w/motor 4VR 71 B2 1.1 kW 3000 rpm, execution 1

Name: VC 4-75 VZ #2.5 w/motor 4VR 71 B2 1.1 kW 3000 rpm, execution 1
Brand: КВЗ
Price: 17161 UAH
Availability: InStock

Low pressure centrifugal fan

Brand: КВЗ

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VC 4-75 VZ #2.5 w/motor 4VR 71 B2 1.1 kW 3000 rpm, execution 1

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Product Code: ID11055

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Low-pressure centrifugal fan series VC 4-75 #2,5
With electric motor Electric motor 4VR 71 B2 1.1 Power kW 3000 Vol./Min
Manufactured according to the scheme of execution #1 of dissimilar materials for explosive environments.
Fan working point: 1420 m³/hour at a pressure of 620 Pa.

Productivity, м³/h:1420

Pressure, Pa:620

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VC 4-75 VZ #2.5 w/motor 4VR 71 B2 1.1 kW 3000 rpm, execution 1

17 161₴

Description

The centrifugal low-pressure fan of the VC 4-75 #2,5 series (VR 88-72.1-5.5, VR 80-75-5) with an Electric motor 4VR 71 B2 1.1 Power kW 3000 Vol./Min electric motor is manufactured from dissimilar metals for explosive environments.

This fan is intended for ventilation or air conditioning systems handling explosive gas-air mixtures of the 1st and 2nd categories, groups T1, T2, and T3 according to the "Rules for Electrical Installation" (PVE) classification, which do not cause accelerated corrosion of the fan's airflow parts. These mixtures must not exceed a temperature of 150 °C, and the content of fibrous materials, sticky substances, dust, and other solid impurities must not exceed 100 mg/m³ under moderate (U) climate conditions (placement category 3) and tropical (T) climate conditions (placement category 2) according to DSTU 15150. The permissible ambient temperature range is from -40°C to +40°C (+40°C when equipped with tropical-design electric motors).

The casing and impeller blades of explosion-proof fans are made from material pairs (Steel-Brass or Steel-Aluminum) that are safe from ignition by friction sparks according to DSTU 22782.0-81.

The centrifugal fan VC 4-75 #2,5 (VR 88-72.1-5.5, VR 80-75-5) consists of the following assemblies, available separately:

VC 4-75 #2,5 (VR 88-72.1-5.5, VR 80-75-5) fan without electric motor
Fan impeller VC 4-75 #2,5 (VR 88-72.1-5.5)
Fan casing (scroll housing) VC 4-75 #2,5 (VR 80-75-5)
Electric motor Electric motor 4VR 71 B2 1.1 Power kW 3000 Vol./Min for VC 4-75 #2,5 fan

General information about centrifugal fans VC 4-75 #2,5 (VR 88-72.1-5.5, VR 80-75-5) with an Electric motor 4VR 71 B2 1.1 Power kW 3000 Vol./Min electric motor made of dissimilar metals:

Low-pressure
Single-sided suction
Backward-curved blades
12 blades
Right-hand and left-hand rotation available
Fans are manufactured according to TU U 28.2-24881057-003:2023
Material: dissimilar metals

Purpose of centrifugal fans VC 4-75 VZ #2.5 w/motor 4VR 71 B2 1.1 kW 3000 rpm (VR 88-72.1-5.5, VR 80-75-5):
The fan is designed for ventilation or air conditioning systems transporting explosive gas-air mixtures of the 1st and 2nd categories, groups T1, T2, and T3 as per the "Rules for Electrical Installation" (PVE), which do not cause accelerated corrosion of the airflow parts. The temperature of the transported medium should not exceed 150 °C, and the content of fibrous materials, sticky substances, dust, and other solid impurities should not exceed 100 mg/m³ under moderate (U) climate conditions (placement category 3) and tropical (T) climate conditions (placement category 2) according to GOST 15150. The allowable ambient temperature range is -40 °C to +40 °C (+40 °C with tropical-version electric motors).

Centrifugal fans VC 4-75 VZ #2.5 w/motor 4VR 71 B2 1.1 kW 3000 rpm (VR 88-72.1-5.5, VR 80-75-5) are used:

In air conditioning systems
In ventilation systems
In air heating systems
For other sanitary and industrial purposes

The centrifugal fan VC 4-75 VZ #2.5 w/motor 4VR 71 B2 1.1 kW 3000 rpm (VR 88-72.1-5.5, VR 80-75-5) operates under moderate climate conditions with an ambient temperature range of -40 °C to +40 °C. The transported medium’s temperature must not exceed 150 °C.

Operating principle of the centrifugal fan VC 4-75 VZ #2.5 w/motor 4VR 71 B2 1.1 kW 3000 rpm (VR 88-72.1-5.5, VR 80-75-5):
Air, gaining energy from the impeller blades, enters the fan under the influence of centrifugal force at a 90-degree angle and is directed radially into the spiral-shaped scroll casing. As the air moves through the spiral casing, it is pressurized and directed out through the fan's outlet.

Fan assembly components of VC 4-75 #2,5 centrifugal fan made of dissimilar metals:
The VC 4-75 #2,5 (VR 88-72.1-5.5, VR 80-75-5) fan with the Electric motor 4VR 71 B2 1.1 Power kW 3000 Vol./Min electric motor includes:

Scroll casing
Impeller
Base frame
Collector
Electric motor Electric motor 4VR 71 B2 1.1 Power kW 3000 Vol./Min

The impeller consists of a front and rear disc, 12 sheet blades, and a hub.

The fan's base frame is welded. The base features an opening for installation on vibration isolators or a foundation. The electric motor and casing are mounted onto the base.

The conical collector for guiding air to the impeller is mounted on the inlet duct. The overlap between the collector and the impeller’s front disc can be adjusted by axial movement of the collector within the inlet duct.

Casing position of right- and left-hand rotation radial fans (view from the suction side):

a) right-hand rotation

b) left-hand rotation
Mounting hole layout for vibration isolators VC 4-75 VZ #2.5 w/motor 4VR 71 B2 1.1 kW 3000 rpm

Note on placement categories depending on climatic conditions:

Category 1: For operation in open air conditions (exposure to the combination of climatic factors typical for a given macroclimatic region).
Category 2: For operation under a canopy or inside spaces (volumes) where temperature and humidity fluctuations are not significantly different from those in the open air, and there is relatively free access to outside air. Examples include tents, vehicle bodies, trailers, metal shelters without thermal insulation, and the casing of a complete product classified as category 1 (without direct exposure to solar radiation and atmospheric precipitation).
Category 3: For operation in enclosed spaces (volumes) with natural ventilation without artificially controlled climatic conditions, where fluctuations in temperature and humidity, as well as the influence of sand and dust, are significantly less than in the open air. Examples include insulated metal buildings, stone, concrete, and wooden structures.
Category 4: For operation in premises (volumes) with artificially regulated climatic conditions, such as closed heated, cooled, or ventilated production facilities; premises with conditioned or partially conditioned air; and other well-ventilated underground spaces.
Category 5: For operation in spaces (volumes) with high humidity, such as unheated and unventilated underground premises, including mines, basements, soil-embedded spaces, certain ship compartments, and other spaces prone to prolonged water presence or frequent condensation of moisture on walls and ceilings.

Specifications

Common

Model

VC 4-75 #2,5

Productivity, м³/h

1420

Pressure, Pa

620

Max. transported air temperature, °C

150

Pollution limits, mg/m3

100

Electric motor 4VR 71 B2

Common

Model

4VR 71 B2

Motor type

asynchronous

Kind

explosion-proof

Motor series

4VR

Shaft diameter, mm

Voltage, V

220/380

Frequency of the current, Hz

Power kW

1.1

Vol./Min

3000

n, vol./Min

2800

Climatic performance

Class of protection, IP

Efficiency, %

79,5

Power factor, cosφ

0,83

Weight, kg

15,6

Consumed nominal current, In (A)

2,7

Dimension (height of rotation axis), mm

Phase

3-phase

The ratio of max. torque to rated power, Mmax/Mn

2,2

The ratio of starting current to the nominal, Istart/In

6,0

The ratio of starting torque to rated power, Mstart/Mn

2,4

D/Dn – the diameter ratio of the fan impeller to the nominal diameter of the impeller. The impellers, which diameters differ from the nominal one, are called co-efficient impellers. The ratio of the diameter of the fan impeller to the nominal diameter of the impeller could be: 0.9, 0.95, 1.05, 1.1.

Fan aerodynamic characteristics with the nominal (standard) diameter of the robotic wheel: D = Dn

Symbols:
Q	- air capacity, thousands m³/h
Pv	- total pressure, Pa
η	- efficiency factor
N	- engine power, kW
U	- circumferential wheel speed, m/s
n	- impeller rotation frequency, rpm