VENTS VKPFI 4D 500*250

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Inline centrifugal sound- and heat insulated fan. Maximum capacity - 1850 m³/h.

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Description
Characteristics
Capacity diagram
Downloads
Dimensions
Additional diagrams
Designation key

Description

APPLICATIONS
Supply and exhaust ventilation systems for various premises with a limited mounting space.	Designed for connection with 400200, 500250, 500300, 600300, 600350, 700400, 800500, 900500, 1000*500 mm rectangular air ducts.
DESIGN
The fan casing is made of galvanized steel.	VKPFI models are heat- and sound-insulated with 50 mm layer of mineral wool.
MOTOR
The impeller with forward curved blades made of galvanized steel is powered by 4- or 6- pole external rotor asynchronous motor. Such modification ensures high air flow capacity and relatively significant differential pressure. For thermal overheating protection the thermal contacts with leaded outside terminals are incorporated in the motor winding for connection with the external protection devices.	The motor is equipped with the ball bearings for long service life. For precise features, safe operation and low noise, each impeller is dynamically balanced while assembly. Motor protection rating IP 44.
SPEED CONTROL
Smooth or step speed control with a thyristor or autotransformer speed controller.	Several fans may be connected to one speed controller provided that the total power and operating current do not exceed the rated speed controller parameters.
MOUNTING
The fans are designed for inline rectangular air duct mounting and require no special fixing in case of direct connection. In case of connection through the flexible connectors the fan is fixed to a building by means of supports, suspension brackets or fixation brackets. The fans can be mounted in any position with respect to the pointer direction on the casing.	Access for the fan maintenance shall be provided. The fan is powered through the external terminals. The casing is provided with the removable access door for maintenance.

VENTS VKPFI fan office ventilation example

Characteristics

Parameter	VKPFI 4D 500*250	Measurement unit
Phase	3	˜
Voltage	400	V
Frequency	50	Hz
Sound pressure level at 3 m distance	44	dBА
Air capacity	1850	m³/h
Power consumption	570	W
Current	0.94	A
RPM	1270	min^-1
Protection rating	IP X4	-
Design	centrifugal	-
Transported air temperature	-20 … +40	°С
Weight	40.5	kg
Number of poles	4	-
Sound- and heat-insulated casing	yes	-
Casing material	galvanized steel	-
Width	500	mm
Height	250	mm
Duct	for rectangular air ducts	-
Mounting	Inline	-

Capacity diagram

Selection method:
Air flow:
Pressure:

Operating point

Air flow: --
Pressure: ---

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Downloads

Dimensions

Characteristics

Parameter	Value	Measurement unit
В	500	mm
B1	520	mm
B2	540	mm
B3	570	mm
H	250	mm
H1	270	mm
H2	290	mm
H3	410	mm
L	640	mm

Additional diagrams

Sound-power level		Octave-frequency band [Hz]
	Hz	General	63	125	250	500	1000	2000	4000	8000
L_wA to inlet	dBA	67	55	61	57	52	61	58	57	54
L_wA to outlet	dBA	71	49	58	60	62	67	66	61	60
L_wA to environment	dBA	50	27	38	41	44	45	42	40	43

ƞ, [%]		MC		EC		N		VSD		[kW]		[A]		[m³/h]		[Pа]		[RPM]		SR
34.3		А		Static		44.9		No		0.210		0.6		820		310		1420		1

Designation key

Series		Motor modification		*Flange diameter [WH]**
		Number of poles	Phase
VENTS VKPF	I: sound- and heat-insulated casing	4 6	E: single phase D: three phases	400200; 500250; 500300; 600х300; 600350; 700400; 800500; 900500; 1000500