This product is discontinued
This product was replaced by  KTEX 50-30-4 (ATEX)

X-KTEX 50-30-4 (ATEX)

Item Number: 1566

Certified according to ATEX directive 94-9 EC

Speed controllable

Integral thermistors (PTC *)

Maintenance-free and reliable

KTEX fans can be installed in any position and are easy to connect using the DS flexible connections. These fans have impellers with forward-curved blades and external rotor motors. The casing is manufactured from galvanised sheet steel, with a copper inlet cone. To protect the motor from overheating, PTC protective circuits in the motors must be connected to a monitoring apparatus certified according to Directive 94/9/EC that isolates the motor from voltage supply immediately when activated. We recommend to use UEK230E

for motor protection.

Explosion proof versions comply with EN 60079-0:2009, EN 14986:2007, EN 60079-7:2007. Improved safety in accordance with

Ex e IIB+H2 T3 Gb

* Positive Temperature Coefficient

Technical parameters

Norminal data
Voltage (nominal) 400 V
Frequency 50 Hz
Phase(s) 3~
Input power 900 W
Input current 1.8 A
Impeller speed 1,355 r.p.m.
Air flow max 2,376 m³/h
Mininum static back pressure 140 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) 58 dB(A)
Enclosure class, motor IP44
Insulation class F
Certificate SP 03ATEX3103X
Controller and Sensors
Ambient and duct temperature -20 to 40 °C
Dimensions and weights
Rectangular, height, inlet 300 x 500 mm
Rectangular, width, inlet 300 x 500 mm
Rectangular, height, outlet 300 x 500 mm
Rectangular, width, outlet 300 x 500 mm
Weight 21.9 kg
Duct connection type Rectangular
Motor type AC

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.


Suitable to transport explosive atmospheres of the zone 1. category 2G and zone 2, category 3G. The fans are applicable for zone 1 and 2 and for temperature classes T1, T2, and T3. Ignition type "e" increased safety EExe II, T3.


Tested acc. to ATEX Directive 94-9-EC.


Conformity with EN 50014, EN 50019, EN 13463-1 and EN 1127-1.


For indoor installation.


Installation in any mounting position.


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RTRD 4 Speed cont. Systemair - Systemair Item Number: 5942 RTRD 4 Speed cont. Systemair

4A 3~ 5 step

RTRDU 4 Speed contr. Systemair - Systemair Item Number: 5946 RTRDU 4 Speed contr. Systemair .
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Termistor Motor protection ATEX approved

FFK 50-30 Filter cassette rect - Systemair Item Number: 1755 FFK 50-30 Filter cassette rect .
LDR 50-30 Silencer - Systemair Item Number: 5071 LDR 50-30 Silencer


DS-EX 50-30 Flex. connection - Systemair Item Number: 4117 DS-EX 50-30 Flex. connection .
Ex e-Terminal box 1,5/6mm² 32A - Systemair Item Number: 2704 Ex e-Terminal box 1,5/6mm² 32A .