KTEX Rectangular Duct Fans

Reliable inline fan for hazardous professional environments

ATEX certified according to ATEX 2014/34/EU
Suitable for high-risk environments
Swing out lid for easy maintenance

Duct connection, inlet [W x H]

Voltage

KTEX 50-25-4(230V/3~) (ATEX)#19403

Frequency: 50 Hz

£ 945.92excl. tax

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Designed for demanding environments

KTEX series of explosion-proof inline fans are designed for potentially hazardous premises like battery charging rooms, fume cupboards or other high-risk environments.

High performance

The KTEX fans combine a compact streamlined design with a high-performance forward curved radial impeller paired with reliable ATEX-rated AC motors.

Flexible installation

KTEX fans can be installed in any position, in rectangular duct air extract systems which makes them easy to fit in all different applications.

Explosion-Proof

KTEX 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. Complies with EN 60079-7:2015, EN 14986:2007, and EN 60079-0:2012.

Tech specs

Features

Casing

Casing made of galvanised sheet steel, corrosion class C3 with a copper inlet cone. The motor of the unit is mounted on swing-out lid to simplify service and maintenance. KTEX fans are equipped with connection cable to connect to the ATEX rated external connection box (separate accessory) for wiring onsite.

Impeller

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

Motor

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

Motor protection

KTEX 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

Motors of KTEX fans can be controlled by a 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

KTEX 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

KTEX 50-25-4(230V/3~) (ATEX)

Article number

#19403

230V 3~ 50Hz
Nominal data
Voltage (nominal)	230	V
Frequency	50	Hz
Phases	3~
Input power	506	W
Input power kW	0.506	kW
Input current	1.54	A
Impeller speed	1,300	rpm
Air flow	max 0.504	m³/s
Mininum static back pressure	110	Pa
Temperature of transported air	max 40	°C
Max temperature of transported air, when speed controlled	40	°C
Sound data
Sound pressure level at 3m (20m² Sabin)	50	dB(A)
Protection/Classification
Enclosure class, motor	IP44
Insulation class	F
Explosion proof marking	Ex eb h IIB + H2 T3 Gb
Certificate	Presafe 17ATEX9970X
Data according to ErP
ErP ready	Not ErP relevant
Ambient and duct temperature
Ambient and duct temperature	-20 to 40	°C
Dimensions and weights
Duct dimension, inlet (height x width)	250 x 500	mm
Duct dimension, outlet (height x width)	250 x 500	mm
Weight	18.2	kg
Others
Duct connection type	Rectangular
Motor type	AC

Performance

Dimensions

H* = Dimensions from the engine bolts

I** = Dimension with fully open hatch.


	A	B	C	D	E	F	G	H*	I**
KTEX 50-25	498	248	270	520	540	290	532	34,5	610
KTEX 50-30	498	298	320	520	540	340	562	34,5	695
KTEX 60-30	598	298	320	620	640	340	642	52	715
KTEX 60-35	598	348	370	620	640	390	717	54,5	805
KTEX 70-40	698	398	420	720	740	440	787	50	900

Specification

Circular duct fan for easy and direct installation in ducts. Galvanized steel sheet housing. Copper inlet cone. Service cover. The fan unit is mounted on the service cover for easy cleaning and maintenance. Free-running, forward curved circular impeller made of galvanized steel sheet. Impeller acc. to VDI 2060, balancing quality G 6.3, dynamically balanced in two planes. Explosion proof, voltage controllable external rotor motor. (IP44), maintenance-free, the motor is placed inside the air flow for cooling. PTC with leads to a motor protection device (e.g. Systemair U-EK 230E-IP54). Speed-controlled via a 5-step transformer. Supply cable, led out. For indoor installation. Installation in any mounting position.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.