Type 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

Shut-off damper Type AK-Ex 00136579_0


  • Application
  • Description

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

Classification

Electronic control: Equipment group II

  • Zones 1 and 2 (atmosphere: gases): II 2 G c II T5/T6
  • Zones 21 and 22 (atmosphere: dusts): II 2 D c II 80 °C


Pneumatic control: Equipment group II

  • Zones 1 and 2 (atmosphere: gases): II 2 G c II T5/T6

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

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)

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

Function, Technical data, Quick sizing, Specification text, Order code

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code

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


Quick sizing tables provide a good overview of the room sound pressure levels that can be expected. Approximate intermediate values can be interpolated. Precise intermediate values and spectral data can be calculated with our Easy Product Finder design programme.

Quick sizing: Static differential pressure and sound pressure levels with open damper blade

Nominal size V Differential pressure Air-regenerated noise
Nominal size V ∆pst LPA
Nominal size V ∆pst LPA
Nominal size l/s m³/h Pa dB(A)

125

49

177

5

20

125

74

265

12

28

125

98

353

21

34

125

147

530

46

45

160

80

290

4

18

160

121

434

10

26

160

161

579

17

32

160

241

869

39

40

200

126

452

4

17

200

188

679

8

24

200

251

905

14

29

200

377

1357

32

37

250

196

707

3

16

250

295

1060

6

22

250

393

1414

11

28

250

589

2121

25

37

315

312

1122

2

16

315

468

1683

4

24

315

623

2244

8

30

315

935

3367

18

41

400

503

1810

1

26

400

754

2714

3

37

400

1005

3619

5

45

400

1508

5429

10

58


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

  • V _______________________ [m³/h]

Air-regenerated noise

  • LPA _______________________ [dB(A)]

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

00131623_0

 Type
AK-EX       Shut-off damper for potentially explosive atmospheres

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

 

Nominal size [mm]
125
160
200
250
315
400

 Actuator
       Electronic
T0S       Actuator
T0F       Spring return actuator
T0X       Actuator with auxiliary switch
T0Y       Spring return actuator with auxiliary switch
       Pneumatic
P50       Actuator

 Damper blade position
       Only for spring return actuators and pneumatic actuators
NO       Pressure off/power off to OPEN
NC       Power off/Pressure off to close

Order example: AK-EX/125/T0S

Material

Galvanised sheet steel

Nominal size

125 mm

Actuator

Electric actuator


Order example: AK-EX/200/P50/NO

Material

Galvanised sheet steel

Nominal size

200 mm

Actuator

Pneumatic actuator

Damper blade position

Pressure off to OPEN


 

Variants, Attachments, Dimensions and weight

  • Variants
  • Attachments
  • Dimensions and weight

AK-Ex, electric actuators

Order code detail Actuator Supply voltage Auxiliary switch

Open/Close actuators




T0S

Actuator

24 – 240 V AC/DC

T0F

Spring return actuator

24 – 240 V AC/DC

2

T0X

Actuator

24 – 240 V AC/DC

T0Y

Spring return actuator

24 – 240 V AC/DC

2


AK-Ex, pneumatic actuators

Order code detail Actuator Control pressure Auxiliary switch

Pneumatic actuators




P50

Pneumatic actuator

0.2 – 1.2 bar


AK-Ex 00188334_0


AK-Ex

Nominal size
ØD
mm
B3
mm
H3
mm
C
mm
125 124 372 221 129
160 159 372 221 111
200 199 463 311 182
250 249 463 311 157
315 314 627 461 289
400 399 627 461 246


AK-Ex

Nominal size
AK-Ex/.../T0*
m
kg
AK-Ex/.../P..
m
kg
125 16.5 15.0
160 16.5 15.0
200 18.0 16.5
250 18.0 16.5
315 22.0 20.5
400 22.0 20.5


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature
Access to attachments 00187631_0


Installation and commissioning

  • Connections for equipotential bonding: Suitable cables must be connected by others
  • Any installation orientation

Space required for commissioning and maintenance

Sufficient space must be kept clear near any attachments to allow for commissioning and maintenance. It may be necessary to provide sufficiently sized inspection access openings.

Space required

Nominal size
Nominal size mm

125

600

220

300

160

600

220

300

200

600

310

300

250

600

310

300

315

600

460

300

400

600

460

300


Principal dimensions

ØD [mm]

Shut-off and flow adjustment dampers made of stainless steel: Outer diameter of the connecting spigot

Shut-off dampers made of plastic: Inside diameter of the connecting spigot

ØD₁ [mm]

Pitch circle diameter of flanges

ØD₂ [mm]

Outer diameter of flanges

ØD₄ [mm]

Inside diameter of the screw holes of flanges

L [mm]

Length of unit including connecting spigot

L₁ [mm]

Length of casing or acoustic cladding

n [ ]

Number of flange screw holes

T [mm]

Flange thickness

m [kg]

Unit weight including the minimum required attachments

Acoustic data

LPA [dB(A)]

A-weighted sound pressure level of air-regenerated noise of the shut-off or flow adjustment damper, system attenuation taken into account


All sound pressure levels are based on 20 μPa.

Volume flow rates

V [m³/h] and [l/s]

Volume flow rate

Differential pressure

Δpst [Pa]

Static differential pressure

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Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265