Privacy Policy (GDPR)
Not registered yet? Take advantages of registration:
Products saving in a binding to the projects
Product consultation from our experts - Online
By using this form, you confirm that you have read the site terms of use Terms of use and completely accept the terms of use

VENTS KSB 500 K2 (Δ)

Inline centrifugal fan in heat- and sound-insulated casing with air flow up to 7000 m³/h.

  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Additional diagrams
  • 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.
  • 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.
  • 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. 
Parameter KSB 500 K2 (Δ)
Measurement unit
Highpowered motor Highpowered motor no -
Sound- and heat-insulated casing yes -
Low-powered motor no -
Duct diameter 500 mm
Design centrifugal -
Phase 1 ˜
Voltage 230 V
Frequency 50 Hz
Sound pressure level at 3 m distance 56 dBА
Power consumption 730 W
Maximum air capacity 7000 m³/h
Current 2.82 A
RPM 980 min-1
Max. transported air temperature -25...+55 °С
Protection rating IP X4 -
Weight 123 kg
Casing material aluzinc -
SEC Class - -
Duct 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
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)
VENTS KSB 500 K2 (Δ)
Parameter Value Measurement unit
∅D 499 mm
B 1203 mm
B1 993 mm
H 724 mm
L 1300 mm
L1 1263 mm
L2 1182 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 87 69 80 86 74 68 59 59 46 67 77
LwA to outlet dbA 92 76 88 90 84 69 60 62 52 72 82
LwA to environment dbA 76 68 75 67 52 50 48 46 40 56 66
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
Share your opinion
I found this page useful to select the required products easy and quick
No difficulties with the site use. Everything is logical ad clear
The site produced a nice impression

Where have you learned about us?