Vents KSB 400 K2

Centrifugal inline fans with backward curved blades in case with improved sound insulation properties

	Unit of measurement	KSB 400 K2
Connected air duct size	mm	400
Phases	-	1
Minimum supply voltage	V	230
Maximum supply voltage	V	230
Power supply frequency	Hz	50	60
Rated power	W	427
Unit current	A	1.87
Maximum airflow	m³/h	3800
Rotation speed at 50hz	-	1451
Sound pressure level LpA at 3 m	dB(A)	49
Weight	kg	78.5
Transported air temperature (max)	°С	55
Transported air temperature (min)	°С	-25
Ingress protection rating	-	IPX4
Ingress protection rating of the drive	-	IP54
Impeller material	-	Aluminium

Trademark	Vents
Model	KSB 400 K2
Type of drive installed	External MSD or VSD
Type of heat recovery system	None
Nominal external pressure (Pa)	436
Maximum external leakage rates (%)	2.7
Static efficiency (%)	56.3
Sound power level (dB(A))	68
Effective electric power input (kW)	0.398
Declared typology	NRVU UVU

Datasheet

"VENTS KSB K2" product description 10-2025

1.03 Mb

Manual

"VENTS KSB K2" user’s manual 09-2025 (V143-1EN-03)

1.89 Mb

BIM/CAD models

KSB K2 (EC)

2.3 Mb

Image

KSB 400 K2 - image 1

297 Kb

∅D	B	B1	H	L	L1	L2
399	927	737	578	1024	957	876

For round ducts

Name	Photo	Description
Vents SR 400/900		Silencers made of galvanized steel filled with non-combustible sound-absorbing material
Vents SR 400/1200		Silencers made of galvanized steel filled with non-combustible sound-absorbing material

For round ducts

Name	Photo	Description
Vents KR 400		Air dampers for controlling air flow in round air ducts

Transformer speed controllers

Name	Photo	Description
Vents RSA5E-3,5-T		Speed controllers are applied for air flow control of single phase fans by means of motor step speed control
Vents RSA5E-5,0-T		Speed controllers are applied for air flow control of single phase fans by means of motor step speed control
Vents RSA5E-7,5-T		Speed controllers are applied for air flow control of single phase fans by means of motor step speed control