DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm, execution 3,1

Name: DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm, execution 3,1
Brand: КВЗ
SKU: ДН21-31

Exhauster

Brand: КВЗ

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Description

Specification

Aerodynamic Characteristics

Dimensions

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DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm, execution 3,1

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Product Code: ID36414

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The DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm series induced draft fan for general industrial use is manufactured according to design scheme No. 3.1 — the impeller is driven via an intermediate shaft.

Productivity, м³/h:140000

Pressure, Pa:5900

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DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm, execution 3,1

Description

DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm, manufactured from high-quality carbon steel, is equipped with a backward-curved blade impeller—a modern engineering solution for industrial smoke exhausters. This design provides high efficiency (up to 80–85%), low noise levels, and stable operation even with changing network resistance. Compared to radial blades, backward-curved blades help reduce energy consumption while maintaining required flow and pressure, and they extend the unit’s service life due to reduced wear.

Advantages of smoke exhausters with backward-curved blades:

High efficiency (up to 80–85%), lower energy losses.
Reduced power consumption with the same flow and pressure parameters.
Quiet and smooth operation, minimal vibration.
No tendency to overload: when resistance increases, the smoke exhauster does not overload, and often even reduces power consumption.
Extended service life—less wear compared to radial blades.

The smoke exhauster is designed for removal of combustion gases and non-explosive dust-laden air mixtures from furnace chambers of boiler units. It is used for solid-fuel boilers with steam capacities from 2.5 to 25 tons per hour, as well as for gas and oil-fired boilers of similar capacity. The maximum temperature of handled gases is up to +200°C. DN #21 series smoke exhausters can be used both individually and in parallel operation and are equipped with an ash collection system with a cleaning efficiency of at least 90%.

Structurally, the DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm smoke exhauster consists of the following units (can be supplied separately):

Spiral scroll housing
Backward-curved blade impeller
Fan base frame
Fan collector
Electric motor DAZO4-400Y-6MT2

The DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm smoke exhauster housing is welded and made of durable carbon steel. The impeller (cantilever-mounted) is backward-curved, ensuring streamlined gas flow. For long-lasting operation, thickened scroll walls and hardfacing on the blades are used. Standard configuration includes a three-phase AIR electric motor (380V, 50Hz).

The smoke exhauster can be manufactured with right- or left-hand rotation. The scroll housing can be rotated from 0 to 270°.

General specifications of DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm smoke exhausters:

Single-side suction
Spiral scroll housing
Backward-curved blade impeller
16 blades
Option for right- or left-hand rotation (determined from the motor side)

Scroll Position of Right-Hand (R) and Left-Hand (L) Rotation Fans, View from Suction Side:

Scroll Position Right-Hand (R) DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm:

Scroll Position DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm Left-Hand (L)

Specifications

Common

Model

DN #21

Motor type

DAZO

Productivity, м³/h

140000

Pressure, Pa

5900

Max. transported air temperature, °C

200

Pollution limits, mg/m3

100

Maximum efficiency, ηmax (%)

Electric motor DAZO4-400Y-6MT2

Common

Model

DA3O4-400Y-6MT2

Motor type

asynchronous

Motor series

DA3O4

Shaft diameter, mm

100

Voltage, V

6000

Frequency of the current, Hz

Power kW

315

Vol./Min

1000

Climatic performance

Т2

Class of protection, IP

Efficiency, %

93,6

Power factor, cosφ

0,84

Weight, kg

2650

2400

Consumed nominal current, In (A)

38,6

Cooling capacity, kW

ICА01A61

Design scheme

prolonged S1

Dimension (height of rotation axis), mm

400

Installation design

IM1001

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

6,5

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

1,2

Aerodynamic characteristics of DN #21 w/motor DAZO4-400Y-6MT2 315 kW 1000 rpm

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