Axial roof fan VENTS VOK series

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Axial roof fans in the steel casing with the horizontal exhaust of air and the air capacity up to 2500 m³/h.

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Products in this series (6)

VOK 2E 200*

Maximum capacity - 860 m³/h.

VOK 2E 250*

Maximum capacity - 1050 m³/h.

VOK 4E 250*

Maximum capacity - 800 m³/h.

VOK 2E 300

Maximum capacity - 2230 m³/h.

VOK 4E 300*

Maximum capacity - 1340 m³/h.

VOK 4E 350

Maximum capacity - 2500 m³/h.

VOK 2E 200*	VOK 2E 250*	VOK 4E 250*
VOK 2E 300	VOK 4E 300*	VOK 4E 350

Series		Motor modification			Impeller diameter
Series		Number of poles	Phase		Impeller diameter
VENTS VOK		2, 4	E- single phase		200; 250; 300; 350

ErP data
Overall efficiency	η,[%]
Measurement category	MC
Efficiency category	EC
Efficiency grade	N
Variable speed drive	VSD
Power	[kW]
Current	[A]
Air flow	[m³/h]
Static pressure	[Pa]
Speed	[n/min^-1]
Specific ratio	SR

Applications

Exhaust ventilation system for various premises for roof mounting. Compatible with Ø 200 to 500 mm round air ducts.

Design

The fan casing is made of steel with polymeric coating.

Motor

The impellers are powered with two- or four-pole, single- or three-phase asynchronous motors with external rotor and built-in thermal overheating protection with automatic restart depending on the model. Ball bearings in the motor ensure long service life. Motor protection rating IP 44.

Speed control

Both smooth or step speed control is performed by means of the thyristor or autotransformer controller. Several fans can be connected to one controller under condition that the total power and operating current do not exceed the rated controller values.

Mounting

The fan is mounted on the roof directly above the ventilating duct or shaft and is firmly fixed to the flat surface by means of a connecting plate. While mounting VOK fans directly onto the flat roof a supporting block shall be provided to prevent water and snow drops into the vent of the ventilation shaft.

Electrical connection and installation shall be performed in compliance with the manual and circuit diagram on the terminal box.