Inline centrifugal fan VENTS VKM 250 E

Description
Characteristics
Capacity diagram
Downloads
Dimensions
Additional diagrams
Designation key

Description

APPLICATIONS
Supply and exhaust systems for various premises. The steel casing provides reliable operation in case of outdoor installation.	For premises with high requirements to the noise level we suggest units in low-noise modification (VKM…Q).
DESIGN
The fan casing is made of steel with polymeric coating.	For easy connection and operation the power cord with a plug can be provided (VKM…R).
MOTOR
The impeller with backward curved blades is powered by the single phase motor with external rotor and overheating protection with automatic restart. Some standard sizes are available is high-powered modifications (VKMS). The VKM…E models are equipped with energy-efficient motor with low energy demand.	The motor is equipped with ball bearings for long service life designed for at least 40 000 hours. For precise features, safe operation and low noise, each turbine 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.	The VKM...P models are equipped with a built-in speed controller (available for diameters 100...315).
MOUNTING
Mounting to wall or ceiling at any angle is performed with fastening brackets supplied with the unit. The fan is powered through the external terminal box.	Electric connection and installation shall be performed in compliance with the manual and wiring diagram on the terminal box.
THE FAN WITH ELECTRONIC TEMPERATURE AND CONTROL MODULE (U OPTION)
The ideal solution for ventilation of the premises requiring permanent temperature control, i.e. greenhouses. The fan with the electronic temperature and speed control module provides automatic control of the motor speed (air capacity) depending on air temperature in the air duct or in the room.	The front panel of the electronic module has the following control knobs: speed control knob for setting the motor speed; thermostat control knob for setting the temperature set point; thermostat indicator light. VKM...Un - the model with an external temperature sensor fixed on a 4 m cable (Un / U1n option). The temoerature sensor has mechanial protection.

VENTS VKM fan catering ventilation example

Characteristics

Parameter	VKM 250 E	Measurement unit
Low-powered motor	no	-
Highpowered motor	no	-
Low energy demand motor	yes	-
Phase	1	˜
Voltage	220-240	V
Frequency	50	Hz
Sound pressure level at 3 m distance	47	dBА
Power consumption	95	W
Current	0.47	A
Maximum air capacity	900	m³/h
RPM	2050	min^-1
Max. transported air temperature	-25 +45	°С
Protection rating	IP X4	-
Design	centrifugal	-
Weight	6.2	kg
Duct diameter	250	mm
Casing material	polymer coated steel	-
SEC Class	C	-
Duct	for round air ducts	-
Type	supply and exhaust	-
Mounting	Inline	-
*	To meet the requirements of ErP 2018, a speed controller and local demand control typology must be applied (connect a sensor).	-

Capacity diagram

Selection method:
Air flow:
Pressure:

Operating point

Air flow: --
Pressure: ---

Files archieve

Downloads

Dimensions

Characteristics

Parameter	Value	Measurement unit
∅D	248	mm
B1	355	mm
ØD1	345	mm
B	395	mm
L	250	mm
L1	25	mm
L2	30	mm
L3	40	mm

Additional diagrams

Sound-power level											LpA, 3 m dBA	LpA, 1 m dBA
		Gen.	Octave-frequency band [Hz]
	Hz	Gen.	63	125	250	500	1000	2000	4000	8000
L_wAto inlet	dBA	89	60	76	83	81	83	79	75	64	68	78
L_wAto outlet	dBA	87	63	75	72	80	82	80	75	62	66	76
L_wAto environment	dBA	67	34	48	59	62	62	60	49	38	47	57

Designation key

Series		Air duct diameter	Options
VENTS VKМ	S: high- powered motor	100; 125; 150; 160; 200; 250; 315; 355; 400; 450	Е: low energy demand motor. Q: low-powered motor. Un: speed controller with an electronic thermostat and a temperature sensor fixed on a 4 m cable. Temperature-based operation logic. U2n: speed controller with an electronic thermostat and a temperature sensor fixed on a 4-meter cable. Temperature-based switching on/off. R1: power cord with a mains plug. P: integrated smooth speed controller.