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VENTS KSB 125 K2 S


Inline centrifugal fan in heat- and sound-insulated casing with air flow up to 484 m³/h.

  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Additional diagrams
  • DESIGNATION KEY
Description
Description
PURPOSE DESIGN
  • KSB fan design allows to use them in supply and exhaust ventilation systems in premises with high requirements to the noise level and with limited space for mounting.
  • For example, the unit design includes a possibility of space-restricted installation above suspended ceilings.
  • They are designed for mounting into Ø 100-500 mm air ducts.
  • The fan casing is made of aluzinc.
  • For easy installation and operation, the top cover of the fan is secured with a special lock.
  • Warm and sound insulation is made of non-combustible mineral wool 50 mm thick.
  • To ensure better noise absorption, the inner surface of the insulation is made of a perforated metal sheet.
  • The round connecting spigots are rubber sealed.
MOTOR MOUNTING
  • The fans are equipped with asynchronous motors with an external rotor and centrifugal impellers with backward curved blades.
  • The motors are equipped with an integrated overheating protection with automatic restart.
  • The use of ball bearings with specially selected lubricating oil guarantees low noise and makes the fan completely maintenance-free.
  • Inline fans are designed for round air ducts.
  • The fans are installed at an air duct junction.
  • The use of flexible connectors requires  fixation of the fan on the building structure by means of supports, mounts, or fixing brackets.
  • The fan can be fixed in any position, taking into account the air flow direction indicated by the arrow on the fan casing.
  • While mounting the fan provide enough access for servicing and repair operations.
SPEED CONTROL
  • The control can be either smooth or stepped and carried out with a thyristor or autotransformer regulator.
  • Several fans can be connected to one controller, provided that the total power and operating current do not exceed the nominal parameters of the controller. 
Characteristics
Characteristics
Parameter KSB 125 K2 S
Measurement unit
Highpowered motor Highpowered motor yes -
Sound- and heat-insulated casing yes -
Low-powered motor no -
Duct diameter 125 mm
Design centrifugal -
Phase 1 ˜
Voltage 230 V
Frequency 50 Hz
Sound pressure level at 3 m distance 40 dBА
Power consumption 88 W
Maximum air capacity 484 m³/h
Current 0.37 A
RPM 2670 min-1
Max. transported air temperature -25 +55 °С
Protection rating IP X4 -
Weight 19 kg
Casing material aluzinc -
SEC Class C -
Form-ducts for round air ducts -
Type supply and exhaust -
Mounting Inline -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air flow:
  • Pressure:
Operating point
  • Air flow: --
  • Pressure: ---
Files archieve
Downloads
Name
Brochure "VENTS KSB K2" (pdf 1.34Mb)
Download high quality image "VENTS KSB K2 (ErP 2018)" (psd 3.64Mb)
Download image "VENTS KSB K2 (ErP 2018)" for your website (png 216.13Kb)
Dimensions
Characteristics
VENTS  KSB 125 K2 S
Parameter Value Measurement unit
∅D 124 mm
B 533 mm
B1 333 mm
H 280 mm
L 630 mm
L1 617 mm
L2 525 mm
Additional diagrams
Additional diagrams
Sound power level [dBA], A-weighted Sound pressure level at 3 m distance, A-weighted Sound pressure level at 1 m distance, A-weighted
Sound power level Gen. Octave frequency band [Hz]
  Hz 63 125 250 500 1000 2000 4000 8000 LpA, 3 m [dBA] LpA, 1 m [dBA]
LwA to inlet dBA 71 56 65 70 60 55 48 48 37 51 61
LwA to outlet dBA 88 72 83 85 80 65 57 59 50 68 78
LwA to environment dBA 60 43 52 58 53 44 42 40 40 40 50
DESIGNATION KEY
DESIGNATION KEY
Series Spigot diameter Modification Motor Options
VENTS KSB 100; 125; 150; 160; 200; 250; 315; 355; 400; 450; 500 К2: heat- and sound-insulated casing S: high-powered motor;
Q: low noise modification
R: power cable with IEC C14 plug
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