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Blauberg S-Vent 280x127-5.5-2D

Centrifugal inline fan.
Maximum air flow up to 6330 m³/h.
EAN codeEAN4058448042027
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Designation key
  • Accessories
  • Dimensions
  • Additional characteristics
  • Selection table for accessories

Extract ventilation systems installed in various premises. Suitable for use as a component of an assembled air handling or conditioning unit. Compatible with ∅ 140 up to 500 mm round air ducts or 125x125 up to 800x800 mm rectangular air ducts.


Scroll casing is made of steel and is covered with a special polymer coating. The fan is equipped with a round intake flange and exhaust rectangular flange for connection to respective air ducts. The fan casing design provides several impeller rotating positions rightwards (R) or leftwards (L) with 45° pitch angle. The casing includes mounting brackets with a mount pad for to facilitate the fan installation to an even surface.


Two-, four-, six- or eight-pole three-phase asynchronous motor with centrifugal impeller and forward curved blades. Galvanized steel impeller. Equipped with ball bearings for longer service life. Dynamically balanced impeller. IP54 ingress protection rating.


Smooth or step-up speed control with an external auto transformer or frequency inverter (both available upon separate order).


The fan is designed for installation as a single unit or as a component unit of ventilation chambers or air conditioning units. The fan has a connection possibility for two air ducts, a rectangular discharge air duct through the flange on the casing as well as a round intake air duct through the connecting flange FRZ-SV. Available upon separate order. In case of rectangular discharge air duct connection a discharge vent must be covered with the SG-SV grille to protect the fan from foreign object ingress. Available upon separate order. The vibration isolators, either of rubber type SI-G or spring-loaded type SI-F, are recommended for noise and vibration attenuation. Vibration isolators reduce dynamic loads on the fan, enhance reliability and durability of the ventilation equipment. The vibration isolators are attached through holes in the mounting pad. Available upon separate order.


Right scroll orientation (view on the intake side)


Left scroll orientation (view on the intake side)

Parameter S-Vent 280х127-5.5-2D Measurement unit
Voltage 400 V
Phase 3 ˜
Frequency 50 Hz
Power 5500 W
Current 10.7 A
RPM 2865 min-1
Maximum air flow 1758 l/s
Maximum air flow 6330 m³/h
Sound pressure level at 3 m 81 dBА
Max. operating temperature +60 °С
Motor IP rating IP54 -
Ingress protection rating IP54 -
EC motor no -
Casing material polymer-coated steel -
Outdoor mounting yes -
Sound-insulated casing no -
Air duct for rectangular air ducts, for round air ducts -
Design centrifugal -
Type Exhaust, Supply -
Weight 42.4 kg
Mounting floor mounting -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air capacity:
  • Pressure:
Operating point
  • Air capacity: --
  • Pressure: ---
Documents archieve
Documents archieve
Select a document type
  • Catalogues
  • Technical documentation
  • Certificates
Helix / S-Vent - user's manual (pdf 1.56Mb)
S-Vent - data sheet (pdf 1.44Mb)
S-Vent - image (png 611.99Kb)
S-Vent - user's manual (pdf 1.07Mb)
Designation key
Designation key
Series Impeller diameter and width [mm]   Motor power [kW]   Number of poles Phase Casing modification Spiral casing pitch angle
S-Vent 140x74; 160x74; 180x74; 200x93; 225x103; 240x114; 250x127; 280x127; 315x143; 355x143; 400x183; 450x203; 500x229 0.25; 0.37; 0.55; 0.75; 1.1; 1.5; 2.2; 3; 4; 5.5; 7.5; 11 2; 4; 6; 8 E: single-phase
D: three-phase
R: Right
L: Left
0; 45; 90; 135; 180; 225; 270; 315
Silencers Filter boxes Electric heaters Water heaters Backdraft air dampers Air dampers Flexible antivibration connectors



Model Overall dimensions [mm]
Ø D Ø d Ø D1 B H H1 H2 L L1 L2 P M I G K S
S-Vent 280x127-5.5-2D 280 10 12 483 646 225 189 545 231 196 243 300 427 27 355 140
Additional characteristics
Additional characteristics
Sound power level, A-weighted Total Octave frequency bands [Hz]
63 125 250 500 1000 2000 4000 8000
LwA to environment [dBA] 80 63 72 81 88 86 91 87 86
Selection table for accessories
Selection table for accessories
Type Rubber anti-vibration mounts Spring-loaded anti-vibration mounts Flange Grille
S-Vent 280x127-5.5-2D SI-G 16 SI-F 16 FRZ-SV 280 SG-SV 280
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