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Series VENTS VOK

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

J DesignThe fan casing is made of steel with polymeric coating.

J MotorThe impellers are powered with two- or four-pole, sin-gle 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.

J Speed controlBoth 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.

J MountingThe 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.

AXIAL ROOF FANS

Accessories

TypeDimensions [mm] Weight

[kg]D D1 H L L1

VOK 2Е 200 208 345 280 425 330 5.0

VOK 2Е 250 262 405 280 425 330 7.0

VOK 4Е 250 262 405 280 425 330 7.0

VOK 2Е 300 314 555 340 585 450 10.5

VOK 4Е 300 314 555 340 585 450 10.5

VOK 4Е 350 364 555 350 655 535 12.0

Motor modification

Number of poles Phase

24

E: single phase

Series

VENTS VOK

Impeller diameter

200; 250; 300; 350

Designation key

Technical data

Fan overall dimensions

Axial roof fans with the air capacity up to 2500 m3/h

in the steel casing with the horizontal exhaust of air

ErP dataOverall efficiency ƞ, [%]

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

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

Voltage [V] 1~ 230

Frequency [Hz] 50 60 50 60 50 60 50 60 50 60 50 60

Power [W] 55 61 80 91 50 56 145 178 75 92 140 147

Current [A] 0.26 0.28 0.4 0.42 0.22 0.24 0.66 0.79 0.35 0.4 0.65 0.66

Max. air flow [m3/h] 860 875 1050 1150 800 865 2230 2280 1340 1475 2500 2650

RPM [min-1] 2300 2550 2400 2990 1380 1730 2300 2410 1350 1405 1380 1700

Noise level at 3 m [dBA] 50 51 60 61 55 56 60 61 58 59 62 63

Max. transported air temperature [°C] -30...+60 -30...+50 -30...+60 -30...+50 -30...+60 -30...+50 -30...+60 -30...+50 -30...+60 -30...+50 -30...+60 -30...+50

Protection rating IP 24 (VKF IPX4)

* Compliant to the ErP-regulation (EC) 327/2011, the power consumption at optimum efficiency is < 125W.

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VENTS. Industrial and commercial ventilation | 02-2016

VENT

S VOK

FAN

SERI

ES

VENTS VOK VENTS VOK

VENTS VOK VENTS VOK

Pre

ssur

e, ∆

P [P

a]

Pre

ssur

e, ∆

P [P

a]

Pre

ssur

e, ∆

P [P

a]

Pre

ssur

e, ∆

P [P

a]

Pres

sure

, ∆P

[in W

G]

Pres

sure

, ∆P

[in W

G]

Pres

sure

, ∆P

[in W

G]

Pres

sure

, ∆P

[in W

G]

Air Flow, [CFM] Air Flow, [CFM]

Air Flow, [CFM] Air Flow, [CFM]

Air Flow, [m3/h] Air Flow, [m3/h]

Air Flow, [m3/h] Air Flow, [m3/h]

118 218 318 418 518

0

0.1

0.2

0.3

0.4

0

20

40

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200 300 400 500 600 700 800 900

118 218 318 418 518 618

0

0.1

0.2

0.3

0.4

0.5

0.6

0

20

40

60

80

100

120

140

200 400 600 800 1000 1200

234 434 634 834 1034 1234

0

0.1

0.2

0.3

0.4

0.5

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20

40

60

80

100

120

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400 800 1200 1600 2000 2400

Ƞmax

471 671 871 1071 1271 1471

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20

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60

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800 1200 1600 2000 2400 2800

Ƞmax

VOK 2E 20050 Hz60 Hz

VOK 2E 250 VOK 4E 250

VOK 2E 300 VOK 4E 300

50 Hz60 Hz

50 Hz60 Hz

50 Hz60 Hz

50 Hz60 Hz

VOK 4E 35050 Hz60 Hz