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VENTS VKM 250 E


Inline centrifugal fans in steel casing with air flow up to 900 m³/h.

  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Designation key
Description
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
Characteristics
Parameter VKM 250 E
Measurement unit
Low-powered motor no -
Highpowered motor Highpowered motor no -
Low energy demand motor 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
Capacity diagram
  • Selection method:
  • Air flow:
  • Pressure:
Operating point
  • Air flow: --
  • Pressure: ---
Files archieve
Downloads
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  • Technical documentation
Name
"VENTS VKM" product description 08-2023 (pdf 1.6Mb)
Download high quality image "VENTS VKM 100-315 (ErP 2018)" (psd 2.16Mb)
Download high quality image "VENTS VKM 355-450 (ErP 2018)" (psd 3.22Mb)
Certificate GS "VKM,VKMz" (pdf 405.03Kb)
Declaration of сonformity "VK,VKM,VKMz" (pdf 1.64Mb)
Certificate LVD "VKM,VKMz" (pdf 107.81Kb)
Download image "VENTS VKM 100-315 (ErP 2018)" for your website (png 299.53Kb)
Download image "VENTS VKM 355-450 (ErP 2018)" for your website (png 407.36Kb)
"VENTS VKM" user's manual 01-2022 (V05EN-11) (pdf 977Kb)
"VENTS VKM(S)" user's manual 01-2024 (V05-3EN-02) (pdf 884.37Kb)
Dimensions
Characteristics
VENTS VKM 250 E
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
Designation key
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.
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