Type AK

For low-leakage shut-off

Circular shut-off dampers for shutting off volume flows in ventilation ducts of air conditioning systems

  • Maintenance-free damper blade mechanism
  • Closed blade air leakage to EN 1751, up to class 4
  • Casing air leakage to EN 1751, class C


Optional equipment and accessories

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

Shut-off damper, variant AK, with actuator 00131938_0


  • Application
  • Description

Application

  • Circular shut-off dampers Type AK for shutting off or restricting the airflow in ventilation ducts of air conditioning systems

Special features

  • Damper blade can be actuated manually, electrically or pneumatically
  • Low-leakage shut-off
  • Safety function provided by optional spring return actuator

Nominal sizes

  • 100, 125, 160, 200, 250, 315, 400

Variants

  • AK: Shut-off damper
  • AK-FL: Shut-off damper with flanges on both ends

Construction

  • Galvanised sheet steel
  • P1: Powder-coated, silver grey (RAL 7001)
  • A2: Stainless steel

Parts and characteristics

  • Ready-to-install shut-off damper
  • Damper blade with blade mechanism

Attachments

  • Open/Close actuators: For the opening and closing of shut-off dampers in air conditioning systems
  • Auxiliary switch for capturing the end positions

Accessories

  • Lip seals on both ends (factory fitted)
  • Matching flanges for both ends

Construction features

  • Circular casing
  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal
  • Position of the damper blade indicated externally at the shaft extension
  • AK-FL: Flanges to EN 12220

Materials and surfaces

Galvanised sheet steel construction

  • Casing and damper blade made of galvanised sheet steel
  • Blade seal made of TPE plastic
  • Bearings made of TPU


Powder-coated construction (P1)

  • Casing made of galvanised sheet steel, powder-coated
  • Damper blade made of stainless steel 1.4301
  • Shaft made of stainless steel 1.4305


Stainless steel construction (A2)

  • Casing and damper blade made of stainless steel 1.4301
  • Shaft made of stainless steel 1.4305

Standards and guidelines

  • Hygiene conforms to VDI 6022
  • Closed blade air leakage to EN 1751, class 4 (nominal sizes 100, 125 and 160, class 3)
  • Nominal sizes 100, 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
Schematic illustration of the AK 00137312_0
① Damper blade
② Lip seal
③ Casing
④ Actuator


Nominal sizes

100 – 400 mm

Acceptable static differential pressure

1500 Pa

Operating temperature

10 – 50 °C


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.

Sizing example

Given data

Vmax = 100 l/s (360 m3/h)

Required sound pressure level in the room 30 dB(A)

Quick sizing

AK/160

Δpst = 10 Pa

Air-regenerated noise LPA = 22 dB(A)

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)

100

10

36

5

<15

100

40

144

10

27

100

65

234

25

38

100

95

342

55

49

125

15

54

5

<15

125

60

216

10

24

125

105

378

25

36

125

150

540

50

45

160

25

90

5

<15

160

100

360

10

22

160

175

630

20

33

160

250

900

45

41

200

40

144

5

<15

200

160

576

10

21

200

280

1008

20

31

200

405

1458

40

39

250

60

216

<5

<15

250

250

900

5

19

250

430

1548

15

29

250

615

2214

30

38

315

100

360

<5

<15

315

410

1476

5

21

315

720

2592

15

34

315

1030

3708

25

43

400

170

612

<5

<15

400

670

2412

5

34

400

1175

4230

10

50

400

1680

6048

15

61


Circular shut-off dampers for shutting off or restricting the airflow in ventilation ducts of air conditioning systems, for supply air or extract air, available in 7 nominal sizes

Suitable for duct pressures up to 1500 Pa.

Ready-to-install unit consists of the casing with a damper blade.

Spigot with groove for lip seal, suitable for connecting ducts according to EN 1506 or EN 13180.

Position of the damper blade indicated externally at the shaft extension.

Closed blade air leakage to EN 1751, class 4 (nominal sizes 100, 125 and 160, class 3).

Casing air leakage to EN 1751, class C.

Special features

  • Damper blade can be actuated manually, electrically or pneumatically
  • Low-leakage shut-off
  • Safety function provided by optional spring return actuator

Materials and surfaces

Galvanised sheet steel construction

  • Casing and damper blade made of galvanised sheet steel
  • Blade seal made of TPE plastic
  • Bearings made of TPU


Powder-coated construction (P1)

  • Casing made of galvanised sheet steel, powder-coated
  • Damper blade made of stainless steel 1.4301
  • Shaft made of stainless steel 1.4305


Stainless steel construction (A2)

  • Casing and damper blade made of stainless steel 1.4301
  • Shaft made of stainless steel 1.4305

Construction

  • Galvanised sheet steel
  • P1: Powder-coated, silver grey (RAL 7001)
  • A2: Stainless steel

Technical data

  • Nominal sizes: 100 – 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.

00131621_0

 Type
AK       Shut-off damper

 Material
       No entry: galvanised sheet steel
P1       Powder-coated, silver grey (RAL 7001)
A2       Stainless steel

 Construction
       No entry: none
FL       Flanges on both ends

 Nominal size [mm]
100
125
160
200
250
315
400

 

 Accessories
       No entry: none
D2       Lip seals on both ends
G2       Matching flanges for both ends

 Actuator
       No entry: manual operation
       For example
B20       24 V AC/DC, modulating 2 – 10 V DC
B30       24 V AC/DC, 3-point
B32       24 V AC/DC, 3-point, with auxiliary switch
TN0       Pneumatic 0.2 – 1 bar

 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/160/D2/B30

Material

Galvanised sheet steel

Nominal size

160 mm

Accessories

Lip seals on both ends

Actuator

Supply voltage 24 V AC/DC


Order example: AK-A2-FL/200/G2

Material

Stainless steel

Construction

Flanges on both ends

Nominal size

200 mm

Accessories

Matching flanges for both ends


 

Variants, Attachments, Dimensions and weight

  • Variants
  • Attachments
  • Dimensions and weight

Materials

Order code detail Part Material Notes

Casing

Galvanised sheet steel


Damper blade

Galvanised sheet steel


Blade seal

Thermoplastic elastomer (TPE)


Shaft

Galvanised steel


Plain bearings

Thermoplastic polyurethane (TPU)


P1

Casing

Galvanised sheet steel


P1

Damper blade

Stainless steel, material no. 1.4301


P1

Shaft

Stainless steel, material no. 1.4305


A2

Casing

Stainless steel, material no. 1.4301


A2

Damper blade

Stainless steel, material no. 1.4301


A2

Shaft

Stainless steel, material no. 1.4305



Surfaces

Order code detail Part Surface Notes

Casing

Untreated


P1

Casing

Powder-coated, RAL 7001, silver grey


A2

Casing

Untreated



AK, electric actuators

Order code detail Actuator Supply voltage Auxiliary switch

Open/Close actuators




B30

Actuator with mechanical stops TROX/Belimo

24 V AC/DC

B32

Actuator with mechanical stops TROX/Belimo

24 V AC/DC

2

B40

Actuator with mechanical stops TROX/Belimo

100 – 240 V AC

B42

Actuator with mechanical stops TROX/Belimo

100 – 240 V AC

2

BP0

Spring return actuator with mechanical stops TROX/Belimo

24 V AC/DC

BP2

Spring return actuator with mechanical stops TROX/Belimo

24 V AC/DC

2

BR0

Spring return actuator with mechanical stops TROX/Belimo

24 – 240 V AC, 24 – 125 V DC

BR2

Spring return actuator with mechanical stops TROX/Belimo

24 – 240 V AC, 24 – 125 V DC

2

Modulating actuators




B20

Modulating actuator 0 – 10 V with mechanical stops TROX/Belimo

24 V AC/DC


AK, pneumatic actuators

Order code detail Actuator Control pressure Auxiliary switch

Pneumatic actuators




TN0

Pneumatic actuator TROX

0.2 – 1.0 bar


AK

Nominal size
AK
L
mm
AK
m
kg
AK/.../B**
L
mm
AK/.../B**
m
kg
AK/.../TN0
L
mm
AK/.../TN0
m
kg
ØD
mm
100 250 1.1 250 2.6 600 3.3 99
125 250 1.4 250 2.9 600 3.6 124
160 250 1.8 250 3.3 600 4.2 159
200 250 2.5 250 4.0 600 5.1 199
250 250 3.5 250 5.0 600 6.1 249
315 400 5.1 400 6.6 600 7.2 314
400 400 7.1 400 8.6 600 9.4 399


AK-FL

Nominal size
AK-FL
L
mm
AK-FL
m
kg
AK-FL/.../B**
L
mm
AK-FL/.../B**
m
kg
AK-FL/.../TN0
L
mm
AK-FL/.../TN0
m
kg
ØD
mm
ØD1
mm
ØD2
mm
n
T
mm
100 230 1.8 230 3.2 580 3.9 99 132 152 4 4
125 230 2.0 230 3.5 580 4.2 124 157 177 4 4
160 230 3.0 230 4.4 580 5.3 159 192 212 6 4
200 230 3.9 230 5.4 580 6.5 199 233 253 6 4
250 230 5.2 230 6.7 580 7.8 249 283 303 6 4
315 380 8.2 380 9.7 580 10.3 314 352 378 8 4
400 380 11.0 380 12.5 580 13.3 399 438 464 8 4


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature
Access to attachments, attached on one side 00149821_0


Installation and commissioning

  • 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

Attachments
Attachments mm

Without actuator

250

200

200

With electric actuator

200

300

300

With pneumatic actuator

400

300

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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Contact

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.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051