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LFB - Centrifugal fan

LFB

Centrifugal fan

Radial low-pressure fan with direct drive, designed for ventilation of rooms with low dustiness. In the industry, often used in cooling, drying, ventilation systems, workshops etc.
Can be painted in a color
other than standard
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APPLICATION

Fan designed for transporting non-aggressive and non-explosive gases without contamination. Typical applications:

  • exhaust and supply ventilation in ventilation units or individual ventilation systems,
  • drying, cooling and ventilation systems,
  • air filtration systems, eg painting walls,
  • pneumatic transport.

CONSTRUCTION

  • low-pressure radial fan with direct drive,
  • the impeller is welded from galvanized steel sheet with forward curved blades,
  • the housing is made of welded sheet steel,
  • protective mesh at the inlet,
  • galvanized net on the outlet (for sizes 2-250),
  • fan painted blue RAL 5010 (corrosivity category C3),
  • maximum temperature of the transported medium is 80oC,
  • ambient temperature range from -20oC to 40oC,
  • LFB are supplied in LG270 configuration.

MOTOR

  • asynchronous single-phase 230V 50Hz (power to 1,5kW),
  • asynchronous, three-phase 230V/400V 50Hz (power to 3 kW),
  • asynchronous, three-phase 400V/690V 50Hz (power from 4 kW),
  • degree of protection IP55,
  • insulation class F,
  • three-phase motors are adapted for frequency converter.

SPECIAL EXECUTIONS

  • optional configuration LG/RD,
  • color other than standard,
  • pointing in higher category of corrosivity,
  • housing and support made of galvanized steel sheet,
  • impeller, housing and support made of stainless steel 1.4301,
  • housing and support made of acid-proof steel 1.4404,
  • motor with voltage and frequency of power different than standard,
  • motor with other than standard degree of protection,
  • motor equipped with sensors or additional cooling,
  • sealing between the housing and the motor,
  • maximum temperature of the transported medium above 80oC,
  • ambient temperature range below -20oC and above 40oC.

Technical assistance

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m3/h
Pa

Work characteristics

Dimensions

Type A B C E F G H I
  mm mm mm mm mm mm mm mm
LFB-2-200/74-150T 335 394 454 141 227 128 138 158
LFB-2-200/74-150S 335 394 454 141 227 128 138 158
Type K L O R S X D1 D2
  mm mm mm mm mm mm mm mm
LFB-2-200/74-150T 178 169 7 379 85 18 239 212
LFB-2-200/74-150S 178 169 7 379 85 18 239 212
Type J1 J2 O1 U1 U2 W1 W2 X1
  mm mm mm mm mm mm mm mm
LFB-2-200/74-150T 73 80 7 15 320 12 379 6
LFB-2-200/74-150S 73 80 7 15 320 12 379 6
Type A B C E F G H O S T X D1 D2
  mm mm mm mm mm mm mm mm mm mm mm mm mm
LFB-2-224/104-300T 335 394 482 145 227 148 139 7 85 97 6 250 230
LFB-4-224/104-055T 335 394 482 145 227 148 139 7 85 97 6 250 230
LFB-4-280/102-075T 410 470 447 180 262 182 160 12 95 116 6 312 265
LFB-4-280/102-075S 410 470 447 180 262 182 160 12 95 116 6 312 265
LFB-4-315/143-220T 504 600 578 213 356 230 240 12 138 142 8 360 331
Type A B C E F G H I K L
  mm mm mm mm mm mm mm mm mm mm
LFB-2-250/114/550T 410 478 528 174 227 175 204 204 222 222
Type O S X D1 D2 J1 J2 N1
  mm mm mm mm mm mm mm mm
LFB-2-250/114/550T 8 112 4 286 242 102 102 23
Type N2 N3 N4 O1 O2 O3 P1 P2
  mm mm mm mm mm mm mm mm
LFB-2-250/114/550T 183 206 329 7 12 10 248 280
Type P3 U1 U2 W1 W2 X1 X2 X3
  mm mm mm mm mm mm mm mm
LFB-2-250/114/550T 310 30 380 32 432 4 4 4
Type A B C E F G H O S T
  mm mm mm mm mm mm mm mm mm mm
LFB-2-280/102-750T 410 470 574 180 262 181 160 7 95 116
LFB-4-355/144-400T 625 640 631 296 363 217 215 9 123 134
LFB-6-355/144-220T 625 640 631 296 363 217 215 9 123 134
LFB-4-400/183-750T 649 764 739 270 440 289 278 9 153 170
LFB-6-400/183-220T 649 764 636 270 440 289 278 9 153 170
Type X D1 D2 N1 N2 N3 N4 P1 P2 P3
  mm mm mm mm mm mm mm mm mm mm
LFB-2-280/102-750T 6 312 270 30 282 312 441 236 272 300
LFB-4-355/144-400T 8 395 287 25 175 200 356 390 425
LFB-6-355/144-220T 8 395 287 25 175 200 356 390 425
LFB-4-400/183-750T 8 446 412 50 320 370 553 272 310 336
LFB-6-400/183-220T 8 446 412 50 320 370 553 272 310 336
Type A B C E F G H I J
  mm mm mm mm mm mm mm mm mm
LFB-2-315/103-1100T 504 610 647 213 366 170 205 220 220
Type K O X D1 D2 L1 L2 N1 N2
  mm mm mm mm mm mm mm mm mm
LFB-2-315/103-1100T 260 13 4 331 360 129 124 50 316
Type N3 N4 O1 O2 P1 P2 P3 X1 X2
  mm mm mm mm mm mm mm mm mm
LFB-2-315/103-1100T 366 519 8 12 270 308 334 8 4

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