DKEX225-4 Centrifugal (ATEX)

DKEX Centrifugal Fans

High-performance ATEX compliant fan for hazardous environments

  • Compact design

  • High-performance

  • Installed in any position

  • ATEX certified according to ATEX 2014/34/EU

DKEX 225-4 Centrifugal (ATEX)#19962
Frequency: 50 Hz

Designed for demanding environment

Durably designed for demanding environments, the DKEX series of explosion-proof centrifugal fans are commonly used in battery charging rooms, fume cupboards or other high-risk environments.

High performance

The DKEX fan combines a compact design with a high performance forward curwed radial impeller paired with reliable ATEX-rated AC motor.

Flexible installation

DKEX fans can be installed in any position and their compact design makes them easily to fit in all different applications.

Explosion-Proof

DKEX series is classified as II 2 G Ex eb h IIB+H₂ T3 Gb.

Intended to use in explosion zone 1 and 2 for extracting gases and mixes of groups IIA, IIB and also hydrogen (H₂), with temperature classes Т1, Т2 and Т3. Comply with EN 60079-7:2015, EN 14986:2007, EN 60079-0:2012.

Tech specs

Features

Casing

The casing of DKEX is made from galvanised sheet steel, corrosion class C3 with a copper inlet cone. Motor of the unit mounted on detachable lid to simplify service and maintenance. DKEX fans are equipped with connection cable to connect to the ATEX rated external connection box (separate accessory) for wiring on site.

Impeller

DKEX fans use single inlet radial impellers with forward-curved blades. Made of lightweight, galvanised sheet steel. Impellers dynamically balanced and paired with corresponding external rotor motors.

Motor

DKEX fans are equipped with ATEX certified, voltage controllable, AC external rotor motors with long-life ball bearings.

Motor protection

DKEX fans have integrated PTC (Positive Temperature Coefficient) protective circuits with external leads for connection to a motor protection device (separate accessory). We recommend to use UEK230E motor protection, certified according to ATEX directive 2014/34/EU.

Control

Fans are controlled by 5-step speed regulator as separate accessory. Speed regulation can be combined with timer, thermostat, hygrostat, etc. by using wide range of electrical accessories.

Mounting

DKEX fans can be installed indoor in any position. To avoid vibration transfer to the duct system we recommend to install flexible connections (accessory) .

Technical Data

Article name
DKEX 225-4 Centrifugal (ATEX)
Article number
#19962
400V 3~ 50Hz
Nominal data
Voltage (nominal)400V
Frequency50Hz
Phases3~
Input power503W
Input power kW0.503kW
Input current0.876A
Impeller speed1,291rpm
Air flowmax 512L/s
Mininum static back pressure125Pa
Temperature of transported airmax 40°C
Max temperature of transported air, when speed controlled40°C
Sound data
Sound pressure level at 3m (20m² Sabin)50dB(A)
Protection/Classification
Enclosure class, motorIP44
Insulation classF
Explosion proof markingII 2 G Ex eb h IIB+H₂ T3 Gb
CertificatePresafe 17ATEX9970X
Data according to ErP
ErP readyNot ErP relevant
Ambient and duct temperature
Ambient and duct temperature-20 to 40°C
Dimensions and weights
Weight12.3kg
Others
Motor typeAC

Performance

Dimensions

DKEX #19962, Dimensions
 
I* = Minimum dimensions to lift the engine
         
ABCDEFGI*
DKEX 225
280133145196196367445337
DKEX 250
315154165216243410492375
DKEX 280
357169180230248453547413
DKEX 315
400188203254276515615465
DKEX 355
450213227278320574689489

Specification

The box is made out of electroplated steel plate. The impeller is made up of electroplated steel plate with forward- curved blades. The actuation is carried out by an explosion- proofed, speed- controllable external rotor motor with completed barretter. The inlet cone is made of copper. For annealing the motor is situated inside the air flow. This fan is maintenance- free and foolproofed. Impeller according to VDI 2060, quality class Q 6,3 and dynamically weigh heavy in two levels.Suitable to transport explosive atmospheres. Tested acc. to ATEX Directive 2014/34/EU.Explosion proof versions comply with EN 60079-7:2015, EN 14986:2007, EN 60079-0:2012.

Documentation