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Blauberg Box 50x30 4D

Supply and exhaust ventilation systems installed in various premises. Maximum air capacity up to 1620 m³/h.
EAN codeEAN4058448013805
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Designation key

Supply and exhaust ventilation systems installed in various premises. Compatible with 400x200 up to 1000x500 mm rectangular air ducts.

Smooth speed control with an external thyristor controller or step speed control with an external auto transformer (both available upon separate order).


Atmospheric resistant galvanized steel casing. The fan is rated for continuous operation. Fitted with standard 20 mm connecting flanges for connection to rectangular air ducts. Access cover on the casing for inspection and maintenance operations. The fan is equipped with a built-in terminal box with a leaded outside sealed electrical lead-in for connection to power mains.

The fan is designed for mounting inside rectangular air ducts and can be installed in any position. The fan flanges are connected to the air ducts through the bolts inserted into the flange holes. The fan is suitable for mounting into round duct at intake flange with a round reducer (available upon separate order). If vibration-absorbing flexible connectors are used to connect the fan to the air ducts provide their fixation to mounting structures with supports or brackets. While mounting provide enough space for accessing the cover for service operations.


Two- or four-pole asynchronous motor with external rotor and centrifugal impeller with backward curved blades. Single-phase (E) or three-phase (D) motor modifications. 
Equipped with ball bearings for longer service life. Dynamically balanced turbine. Overheating protection by built-in thermal switches with automatic restart or with leaded outside terminals for connection to external protecting controls.The thermal switch terminal leads are designed for connection to respective circuit of the contacter, overload relay or respective terminals of the autotransformer or thyristor speed controller.

Parameter Box 50x30 4D
50 Hz
Box 50x30 4D
60 Hz
Measurement unit
Voltage 400 400 V
Phase 3 3 ˜
Frequency 50 60 Hz
Power 136 165 W
Current 0.34 0.53 A
RPM 1360 1600 min-1
Maximum air flow 1380 1620 m³/h
Maximum air flow 383 450 l/s
Sound pressure level at a distance of 3 m 52 55 dBА
Temperature of transported air -25...+65 -25...+55 °С
Ingress protection rating IPX4 IPX4 -
Motor IP rating IP44 IP44 -
Casing material galvanized steel galvanized steel -
Air duct for rectangular air ducts for rectangular air ducts -
Design centrifugal centrifugal -
Type Exhaust, Supply Exhaust, Supply -
Weight 19.80 19.80 kg
Mounting Inline Inline -
ErP 2016, 2018 2016, 2018 -
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
Box - data sheet (pdf 1.78Mb)
Box - image (png 699.03Kb)
Box - user's manual (pdf 3.04Mb)

Type dimensions [mm]
B B1 H H1 H2 L
Box 50x30 4D 500 540 300 340 340 680
Designation key
Designation key
Series Flange size (width x height) [cm] Motor
Number of poles
Box 40х20; 50х25; 50х30; 60х30; 60х35; 100х50 2,4 E: single-phase
D: three-phase