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DN #21 w/motor DAZO4-400X-6MU1 315 kW 1000 rpm, execution 3,1

Exhauster

Brand: КВЗ
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Aerodynamic Characteristics
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Product Code: ID36413
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Smoke exhauster of the DN #21 series with electric motor Electric motor DAZO4-400X-6MU1 315 Power kW 1000 Vol./Min for general industrial use.

Operating point: capacity of 140000 m³/h at a pressure of 5900 Pa.

Equipped with a backward-curved blade impeller — for increased efficiency, reduced noise, and energy savings. Suitable for extracting flue gases and dust-gas-air mixtures at temperatures up to +200°C.

The motor is mounted on an SKF/SNR bearing support with grease lubrication.

Productivity, м³/h:140000
Pressure, Pa:5900
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DN #21 w/motor DAZO4-400X-6MU1 315 kW 1000 rpm, execution 3,1
Description

Smoke exhauster of the DN #21 series with Electric motor DAZO4-400X-6MU1 315 Power kW 1000 Vol./Min electric motor, manufactured from high-quality carbon steel.

DN #21 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 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 Electric motor DAZO4-400X-6MU1 315 Power kW 1000 Vol./Min, specially selected for DN #21

The DN #21 w/motor DAZO4-400X-6MU1 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 DAZO4-400X-6MU1 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:

a) Right-hand rotation
Scroll Position Right-Hand (R) DN #21 w/motor DAZO4-400X-6MU1 315 kW 1000 rpm:
b) Left-hand rotation
Scroll Position DN #21 w/motor DAZO4-400X-6MU1 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 (%)
54
Electric motor DAZO4-400X-6MU1
Common
Model
DA3O4-400X-6MU1
Motor type
asynchronous
Motor series
DA3O4
Shaft diameter, mm
100
Voltage, V
6000
Frequency of the current, Hz
50
Power kW
315
Vol./Min
1000
Climatic performance
U1
Class of protection, IP
54
Efficiency, %
93,9
Power factor, cosφ
0,85
Weight, kg
2380
76
1400
Consumed nominal current, In (A)
38
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
2,5
The ratio of starting current to the nominal, Istart/In
6,5
The ratio of starting torque to rated power, Mstart/Mn
1,3

Aerodynamic characteristics of DN #21 w/motor DAZO4-400X-6MU1 315 kW 1000 rpm


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