VKM 125 AC

Inline centrifugal fans in steel casing with air flow up to 360 m³/h.

  • AC Motor
  • Speed-controllable
  • Backward-curved blades

Description

APPLICATIONS
  • Supply and exhaust ventilation systems for commercial, office and other public or industrial 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 temperature sensor has mechanical protection.

Characteristics

Parameter VKM 125
50 Hz
VKM 125
60 Hz
Measurement unit
Voltage 230 V
Frequency 50 60 Hz
Sound pressure level at 3 m distance 40 42 dBА
Power consumption 64 85 W
Maximum air capacity 360 357 m³/h
Current 0.29 0.37 A
RPM 2840 3300 min-1
Max. transported air temperature -25 +45 °С
Protection rating IP X4
Duct diameter 125 mm
Design centrifugal
Weight 3.2 kg
Casing material polymer coated steel
SEC Class C
Duct for round air ducts
Type supply and exhaust
Mounting Inline

Additional characteristics

Sound-power level LpA, 3 m dBA LpA, 1 m dBA
Gen. Octave-frequency band [Hz]
Hz 63 125 250 500 1000 2000 4000 8000
LwA to inlet dBA 83 60 75 81 73 67 63 57 46 62 72
LwA to outlet dBA 82 67 75 80 72 64 60 55 44 61 71
LwA to environment dBA 61 28 49 51 55 57 53 44 34 40 50

Dimensions

Parameter Value Measurement unit
∅D 123 mm
B1 270 mm
ØD1 255 mm
B 310 mm
L 205 mm
L1 20 mm
L2 25 mm
L3 30 mm

14 schema Inline centrifugal fans in steel casing with air flow up to 360 m³/h. AC Motor Speed-controllable Backward-curved blades