AK-Ex

Shut-off damper Type AK-Ex

ATEX-Zertifizierung

ATEX-compliant parts and units

AK-EX

FOR LOW-LEAKAGE SHUT-OFF OF VOLUME FLOWS IN POTENTIALLY EXPLOSIVE ATMOSPHERES (ATEX)

Circular shut-off dampers for shutting off ducts, approved and certified for potentially explosive atmospheres (ATEX)

ATEX-compliant construction and parts
Approved for all gases, mists and vapours in zones 1 and 2, with electric actuator additionally for dusts in zones 21 and 22
Suitable for supply air and extract air
Electric or pneumatic actuator
Any installation orientation
Closed blade air leakage to EN 1751, up to class 4
Casing air leakage to EN 1751, class C

Optional equipment and accessories

Spring return actuator
Auxiliary switch with adjustable switching points for capturing the end positions

General information

Application

Circular EXCONTROL shut-off dampers Type AK-Ex for shutting off or restricting the airflow in ventilation ducts of air conditioning systems
For use in potentially explosive atmospheres (ATEX)
Input signal to control shut-off damper blade is to be provided by others

Special features

ATEX mark and certification
ATEX equipment group II, approved for use in zones 1 and 2; electric actuator also for zones 21 and 22

Nominal sizes

125, 160, 200, 250, 315, 400

Construction

Galvanised sheet steel
P1: Inner duct powder-coated, silver grey (RAL 7001)
A2: Inner duct in stainless steel

Parts and characteristics

Ready-to-install shut-off damper
Damper blade with blade mechanism
Connection for equipotential bonding
Cable bushings suitable for use in potentially explosive atmospheres
ATEX-compliant actuator is factory assembled and wired

Attachments

Electronic actuator:
Auxiliary switch for capturing the end positions
Pneumatic actuator

Construction features

Circular casing
Construction and materials comply with the EU directive for use in potentially explosive atmospheres (ATEX)
Spigot with lip seal, for circular connecting ducts to EN 1506 or EN 13180

Technical data

Nominal sizes: 125 – 400 mm
Acceptable static differential pressure: 1500 Pa

Standards and guidelines

Directive 94/9/EC: Equipment and protective systems intended for use in potentially explosive atmospheres
Closed blade air leakage to EN 1751, class 4 (nominal sizes 100 and 160, class 3)
Nominal sizes 125 and 160 meet the general requirements, nominal sizes 200 – 400 meet the increased requirements of DIN 1946, part 4, with regard to the acceptable closed blade air leakage
Casing air leakage to EN 1751, class C

Maintenance

Maintenance-free as construction and materials are not subject to wear

TECHNICAL INFORMATION

Schematic illustration of the AK-Ex with electronic control

① Cover
② Auxiliary switch
③ Electric actuator
④ Terminal box
⑤ Cable bushing
⑥ Equipotential bonding
⑦ Damper blade

Nominal sizes	125 – 400 mm
Acceptable static differential pressure	1500 Pa
Operating temperature	10 – 50 °C

Electronic

Supply voltage	24 – 230 V AC ± 10 %, 50/60 Hz
Power rating	120 VA max.
IEC protection class	I (protective earth)
Protection level	IP 42
EC conformity	ATEX to 2014/34/EU, EMC to 2014/30/EU, low voltage to 2014/35/EU

Pneumatic

Control pressure	0 – 1.2 bar
Maximum pressure	1.5 bar
Compressed air	Compressed air for instruments, free of oil, water and dust
Protection level	IP 42
Air consumption (100 % stroke)	0.3 l/n (nominal sizes 125 – 250) to 0.5 l/n max. (nominal size 315 – 400)
EC conformity	ATEX to 2014/34/EU

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

Circular shut-off dampers for shutting off or restricting the airflow in potentially explosive atmospheres, for supply air or extract air, available in 6 nominal sizes.

Suitable for duct pressures up to 1500 Pa.

Ready-to-install unit consists of the casing with damper blade, and parts for equipotential bonding and for use in potentially explosive atmospheres.

Spigot with lip seal, for circular connecting ducts to EN 1506 or EN 13180.

Closed blade air leakage to EN 1751, class 4 (nominal sizes 125 and 160, class 3).

Casing air leakage to EN 1751, class C.

Special features

ATEX mark and certification
ATEX equipment group II, approved for use in zones 1 and 2; electric actuator also for zones 21 and 22

Materials and surfaces

Casing and damper blade made of galvanised sheet steel
Blade seal made of TPE plastic
Plain bearings made of polyurethane
Electric actuator made of die cast aluminium
Pneumatic actuator made of plastic
Inner tube either made of stainless steel 1.4301 (A2) or powder-coated (P1)

Construction

Galvanised sheet steel
P1: Inner duct powder-coated, silver grey (RAL 7001)
A2: Inner duct in stainless steel

Technical data

Nominal sizes: 125 – 400 mm
Acceptable static differential pressure: 1500 Pa

Sizing data

qᵥ [m³ /h]

Air-regenerated noise

LPA [dB(A)]

1 Type
AK-Ex Shut-off damper for potentially explosive atmospheres

2 Material
No entry: galvanised sheet steel
P1 Inner duct powder-coated, RAL 7001 (silver grey)
A2 Inner duct in stainless steel

3 Nominal size [mm]
125, 160, 200, 250, 315, 400

4 Actuator
Electric
T0S Actuator
T0F Spring return actuator
T0X Actuator with auxiliary switch
T0Y Spring return actuator with auxiliary switch

Pneumatic
P50 Actuator

5 Damper blade position
Only with spring return actuator or pneumatic actuator
NO pressure off/power off to OPEN (Normally Open)
NC power off/pressure off to CLOSE (Normally Closed)

Downloads

product information

Product data sheet Type AK-Ex

AK-Ex_PD_2023_11_15_DE_en Product data sheet 440 KB pdf

certificates

Declaration of conformity or declaration of incorporation Type AK-Ex

CE_2019_08_AK-Ex_de_en_fr Declaration of conformity or declaration of incorporation 63 KB pdf
Declaration of hygiene conformity Type AK-Ex

AK-Ex_HC_2020_06_08_DE_en Hygiene certificate 1,8 MB pdf
EC Declaration of conformity

CE_2015_03_AK-Ex_DE_de_en_fr.pdf Certificate 540 KB pdf
Leakage classification of TROX ventilation components

LC_v1_2023_11_DE_en Certificate 650 KB pdf

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