Blowing fans ВДН-18, ВДН-20, ВДН-22

ВДН-6,3 ВДН-26
ВДН-8 ВДН-26Ф
ВДН-9 ВДН-28
ВДН-10 ВДН-31,5
ВДН-11,2 ВДН-32Б
ВДН-12,5 ВДН-24×2М
ВДН-13 ВДН-25×2У
ВДН-15 ВДН-25×2М
ВДН-17 ВДН-25×2
ВДН-18 ВДН-25×2-I
ВДН-19 ВДН-25×2-II
ВДН-20 ВДН-25×2-IIM
ВДН-21 ВДН-28×2-I
ВДН-22 ВДН-36×2-Э
ВДН-24

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General information

• low Pressure

• One-side suction

• Direction of rotation – right-hand and left-hand

• Quantity of blades – 12 pc

Blowing fans  of one way suction  ВДН-18,  ВДН-20 and  ВДН-22 (manufactured by aerodynamic scheme of МО  ЦКТИ0,7-160-II) are intended for supply of a clean airinto the combustion chambers of stationary steam boilers and production units in other industries.

Fans  ВДН are intended for operation at the ambient temperature minimum -30° Сand maximum +40° С; maximum allowed temperature of moved media at thefan entry is +200° С.

Blowing fans ВДН are designed for the long period operation indoorsand outdoors (outside, under tent)  in  mild  climate  (climate  optin  Y,  location  category  2,  GOST  15150-69).  Allowed  ambient temperature is minimum -30°C and maximum +40°C.

The casing of fans ВДН is manufactured with turning angle 0° to 270° with15° pitch, the casing ribs, which hinder instillation, can be cut.

Advantages of blowing fans ВДНby «Medved concern»:

Axial  guide  mechanism  of  a  blowing  fan  features  the improved  design:  rotation  ring  rollers  are installed on the roller bearing, what ensures the smooth turning of a guide mechanism blades. The guide mechanism is equipped with a dismountable handle, which ensures the convenient connection of singleturn  actuators.  The  application  of  Teflon  bushes  and  cast  iron  cowl  on  the  axial  guide  mechanism ensures the minimum gaps of turning pins. It reduces blowing fan operating vibration and noise level appropriately.

Blowing  fans  by  scheme  3  and  5  have  dismountable  bearing  unit,  which  improve  maintenance ability: it enables bearing change in the housing without removing of working wheel. In blowing fans ВДНby scheme 3 and 5 from the working wheel side the big size bearing is installed, which improves the fans reliability. In fans  ВДНby scheme 3 and 5 with  №9 it is possible to install the cooling piping circuit, is necessary.

Specifications of blowing fans

Overall and mounting characteristics of blowing fans ВДН


Dimensions and connection sizes of fans ВДН(90°)

Aerodynamic characteristics of blowing fans ВДН

ВДН-6,3

ВДН-8

ВДН-9

ВДН-10

ВДН-11,2

ВДН-12,5

ВДН-13

ВДН-15

ВДН-17

ВДН-18

ВДН-19

ВДН-20

ВДН-21

ВДН-22

ВДН-24

ВДН-26

ВДН-26Ф

ВДН-28

ВДН-31,5

ВДН-32Б

ВДН-24×2М

ВДН-25×2У

ВДН-25×2М

ВДН-25×2

ВДН-25×2-I

ВДН-25×2-II

ВДН-25×2-IIМ

ВДН-28×2-I

ВДН-36×2-Э

Acoustic characteristics of blowing fans ВДН

Machine
size
n,
мin¯¹
Measurement
range
The value of Lpi, dB in the octave band f, Hz
LpA,
дБА
125 250 500 1000 2000 4000 8000
ВДН-19 750 Discharge 111 114 113 110 108 104 98 115
Suction 105 110 109 106 104 100 94 111
Around the hull 100 104 103 100 97 92 85 105
1 000 Discharge 118 122 120 117 115 111 105 123
Suction 114 118 116 113 111 107 101 119
Around the hull 109 112 110 107 104 100 93 112
ВДН-13 1 000 Discharge 103 108 107 104 102 98 92 109
Suction 99 104 103 100 98 94 88 105
Around the hull 94 98 97 94 91 86 80 98
1 500 Discharge 112 115 120 117 114 109 104 122
Suction 108 111 116 113 110 105 100 118
Around the hull 103 106 110 107 103 97 92 111
ВВДН-15 1 500 Discharge 116 120 111 107 103 96 89 115
Suction 113 115 108 105 101 93 87 111
Around the hull 110 111 104 102 97 90 82 108
ВДН-20 750 Discharge 108 109 108 107 103 98 93 108
Suction 105 106 105 104 100 95 90 108
Around the hull 97 97 95 94 90 87 83 98
1 000 Discharge 115 116 115 114 110 105 100 115
Suction 112 113 112 111 107 102 97 115
Around the hull 104 104 102 101 97 94 90 105
ВДН-26 600 Discharge 113 111 112 111 107 102 96 115
Suction 114 109 110 108 106 103 98 113
Around the hull 110 108 107 104 100 94 85 109
750 Discharge 119 117 118 117 113 108 102 121
Suction 120 115 116 114 112 109 104 119
Around the hull 116 114 113 110 106 100 91 115
ВДН-10 1 000 Discharge 96 100 98 95 93 87 80 100
Suction 92 96 94 91 89 83 76 96
Around the hull 89 92 90 87 84 77 70 91
1 500 Discharge 103 106 111 108 105 100 95 113
Suction 99 102 107 104 101 96 91 109
Around the hull 94 97 101 98 94 88 83 102
ВДН-28 600 Discharge 116 114 115 114 110 105 98 118
Suction 117 112 113 111 108 106 101 116
Around the hull 113 111 110 107 103 97 89 112
750 Discharge 121 119 120 119 115 110 103 123
Suction 122 117 118 116 113 111 106 121
Around the hull 118 116 115 112 108 102 94 117
ВДН-21 600 Discharge 107 105 106 105 101 96 89 109
Suction 108 103 104 102 99 97 92 107
Around the hull 104 102 101 98 94 88 79 103
750 Discharge 113 111 112 111 107 102 95 115
Suction 114 109 110 108 105 103 98 113
Around the hull 110 108 107 104 100 94 85 109
ВВДН-17 600 Discharge 120 125 115 111 107 100 93 119
Suction 117 119 112 109 105 97 91 115
Around the hull 114 115 108 106 101 94 86 111
ВДН-17 750 Discharge 105 110 109 106 104 100 94 111
Suction 101 106 105 102 100 96 90 107
Around the hull 96 100 99 96 93 88 82 100
1 000 Discharge 112 117 116 113 111 107 101 118
Suction 108 113 112 109 107 103 97 114
Around the hull 103 107 106 103 100 95 89 107
1 500 Discharge 121 124 129 126 123 118 113 131
Suction 117 120 125 122 119 114 109 127
Around the hull 112 115 119 116 112 106 101 120
ВДН-32Б 600 Discharge 117 115 116 115 111 105 99 119
Suction 118 113 113 112 109 107 102 117
Around the hull 114 112 111 108 104 98 89 113
750 Discharge 123 121 122 121 117 112 105 125
Suction 124 118 119 118 115 113 108 123
Around the hull 119 118 117 114 110 104 95 119
ВДН-12,5 1 000 Discharge 103 107 106 103 101 95 88 108
Suction 99 103 102 99 97 91 84 104
Around the hull 96 99 98 95 92 85 78 99
1 500 Discharge 111 114 119 116 113 108 103 121
Suction 107 110 115 112 109 104 99 117
Around the hull 102 105 109 106 102 96 91 110
ВДН-8 1 000 Discharge 86 90 88 85 83 77 70 91
Suction 82 86 84 81 79 73 66 87
Around the hull 77 81 78 75 72 65 58 80
1 500 Discharge 94 96 101 98 95 90 85 103
Suction 90 92 97 94 91 87 81 99
Around the hull 85 87 91 88 84 78 73 92
ВДН-31,5 600 Discharge 117 113 110 104 102 94 86 111
Suction 111 110 111 105 101 93 85 111
Around the hull 102 100 100 102 99 91 85 105
750 Discharge 121 121 116 112 108 103 94 118
Suction 115 117 116 114 108 101 93 118
Around the hull 109 106 106 107 106 101 92 112
ВДН-18 750 Discharge 105 107 105 104 100 95 91 105
Suction 102 103 102 101 97 92 87 105
Around the hull 95 94 92 91 87 84 82 95
1 000 Discharge 113 114 112 111 107 102 98 113
Suction 109 120 109 108 104 99 94 113
Around the hull 103 103 99 99 97 91 89 103
ВДН-6,3 1 000 Discharge 80 84 91 81 79 80 66 90
Suction 76 80 87 75 74 76 62 86
Around the hull 71 76 82 69 67 67 60 80
1 500 Discharge 88 90 95 92 89 84 79 97
Suction 84 86 91 88 85 80 75 93
Around the hull 79 81 85 82 78 72 67 86
ВДН-15 750 Discharge 101 106 105 102 100 96 90 107
Suction 97 102 101 98 96 92 86 103
Around the hull 92 96 105 92 89 84 78 96
1 000 Discharge 108 113 112 109 107 103 97 114
Suction 104 109 108 105 103 99 93 110
Around the hull 99 103 102 99 96 91 85 103
1 500 Discharge 101 106 105 102 100 96 90 107
Suction 97 102 101 98 96 92 86 103
Around the hull 92 96 105 92 89 84 78 96
ВДН-11,2 1 000 Discharge 100 103 102 99 97 91 84 104
Suction 96 100 98 95 93 87 80 100
Around the hull 93 96 94 91 88 81 74 95
1 500 Discharge 107 110 115 112 109 104 99 117
Suction 103 106 111 108 105 100 93 113
Around the hull 98 101 105 102 98 92 87 106
ВДН-24 600 Discharge 110 108 109 108 104 99 92 112
Suction 111 106 107 105 102 100 95 110
Around the hull 107 105 104 101 106 91 82 109
750 Discharge 116 114 115 114 110 105 98 118
Suction 117 112 113 111 108 106 101 116
Around the hull 113 111 110 107 112 97 88 115
ВДН-9 1 000 Discharge 90 94 92 89 87 81 74 94
Suction 86 90 88 85 84 77 70 90
Around the hull 81 84 82 79 76 69 62 83
1 500 Discharge 97 100 105 102 99 94 89 107
Suction 93 96 101 98 95 90 85 103
Around the hull 88 91 94 91 89 82 77 96
NOTE: Acoustic characteristics are given for conditions: the axial guide unit is fully open, Bar=760 mm Hg. art., the temperature of the moving medium t=30°C.
Acoustic characteristics of traction machines type VDN×2 №24÷36
Machine
size
n,
мin¯¹
Measurement
range
The value of Lpi, dB in the octave band f, Hz
LpA,
дБА
125 250 500 1000 2000 4000 8000
ВДН‑24×2М 750 Ddischarge 120 118 119 118 113 108 101 122
Suction 120 115 116 114 111 109 105 119
Around the hull 116 114 113 110 106 100 91 115
ВДН‑25×2У 750 Ddischarge 121 120 117 118 112 109 107 121
Suction 116 111 111 113 109 106 103 117
Around the hull 115 113 108 108 106 101 96 113
ВДН‑25×2 750 Ddischarge 120 119 116 117 113 109 106 121
Suction 115 110 109 111 107 106 108 116
Around the hull 114 113 111 107 105 101 96 113
1 000 Ddischarge 127 126 123 124 120 116 113 128
Suction 122 117 116 118 114 113 108 122
Around the hull 121 120 118 114 112 108 103 120
ВДН‑25×2‑II 750 Ddischarge 137 131 132 129 125 120 114 134
Suction 128 122 123 122 120 120 116 128
Around the hull 128 123 119 115 114 110 106 122
ВДН‑36×2‑Э 750 Ddischarge 134 136 131 126 122 118 107 133
Suction 121 123 122 118 112 109 101 123
Around the hull 112 103 112 109 109 103 92 115

NOTE: Acoustic characteristics are given for conditions: the axial guide unit is fully open, Bar=760 mm Hg. art., the temperature of the moving medium t=30°C.