Type VDL

For high rooms, with adjustable air control blades

Circular ceiling swirl diffusers, with manual or motorised adjustment of the air pattern to ensure draught-free ventilation of the occupied zone both in heating and cooling modes

  • Nominal sizes 315, 400, 630, 800
  • Volume flow rate range 65 – 1080 l/s or 234 – 3888 m³/h
  • Diffuser face made of galvanised, powder-coated sheet steel and of aluminium
  • For supply air
  • For variable and constant volume flows
  • High induction results in a rapid reduction of the temperature difference and airflow velocity
  • Discharge direction can be adjusted manually or with an actuator
  • Diffuser face with aerodynamically optimised contours
  • Ideal for high rooms


Optional equipment and accessories

  • Exposed diffuser face available in RAL CLASSIC colours
  • Horizontal or vertical duct connection
  • An extended border improves the horizontal air discharge in cooling mode
  • Protective cage for use in gymnasiums
  • Actuators for adjusting the air discharge direction
  • Diffuser face can be removed from the room side

VDL 00132524_0


  • Application
  • Description

Application

  • Type VDL ceiling swirl diffusers are used as supply air diffusers for high rooms in comfort and industrial zones
  • For production halls, gymnasiums, theatres and conference rooms as well as for large internal spaces in airports, railway stations and shopping centres
  • For mixed flow ventilation with different air patterns in heating and cooling modes
  • Horizontal swirling supply air discharge in cooling mode
  • The efficient swirl creates high induction levels, thereby rapidly reducing the temperature difference and airflow velocity
  • Angled or vertical air discharge in heating mode
  • For variable and constant volume flows
  • For supply air to room air temperature differences from –12 to +15 K
  • For room heights exceeding 3.8 m
  • With freely suspended installation, an extended border supports the horizontal air discharge in cooling mode

Special characteristics

  • For high rooms, with adjustable air control blades
  • Diffuser face with aerodynamically optimised contours
  • The air pattern can be adjusted manually or with an actuator
  • Horizontal or vertical duct connection

Nominal sizes

  • 315, 400, 630, 800

Variants

  • A: Diffuser face without flange
  • B: Diffuser face with flange


Connection

  • F: Diffuser face only
  • H: Horizontal duct connection, with plenum box
  • V: Vertical duct connection, with plenum box


Diffuser face

  • N: Non-removable diffuser face
  • D: Removable diffuser face, only in variant with plenum box

Parts and characteristics

  • Circular diffuser face
  • Removable or non-removable diffuser face
  • Radially arranged fixed or adjustable blades for air discharge from horizontal (0°) to vertical (90°)
  • Diffuser face with or without flange
  • Adjustment mechanism covered by decorative cap

Accessories

  • Lip seal
  • Electric actuators for adjusting the air discharge direction
  • Extended border and protective cage

Useful additions

  • TDC temperature difference control module

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal (if accessory lip seal has been ordered)

Materials and surfaces

  • Blades, casing, duct collar, extended border, plenum box and cross bar made of galvanised sheet steel
  • Diffuser face and decorative cap made of aluminium
  • Protective cage made of steel mesh
  • Blades, duct collar, extended border, plenum box, diffuser face and decorative cap powder-coated RAL 9010, pure white
  • P1: Powder-coated, RAL CLASSIC colour

Standards and guidelines

  • Sound power level of the air-regenerated noise measured according to EN ISO 5135

Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Inspection and cleaning to VDI 6022

Teknisk information

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

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

Functional description

Ceiling swirl diffusers in air conditioning systems create a swirl to supply air to rooms. The resulting airflow induces high levels of room air, thereby rapidly reducing the airflow velocity and the temperature difference between supply air and room air. Ceiling swirl diffusers allow for large volume flow rates. The result is a mixed flow ventilation in comfort zones, with good overall room ventilation, creating only very little turbulence in the occupied zone.

Type VDL ceiling swirl diffusers have adjustable air control blades. Different air patterns allow for cooling or heating mode, or for the adjustment to varying loads. Horizontal air discharge is omni directional. Vertical air discharge is possible in heating mode. The supply air to room air temperature difference may range from –12 to +15 K.

An actuator (optional) adjusts the blades based on demand.

Nominal sizes

315, 400, 630, 800 mm

Minimum volume flow rate

65 – 320 l/s or 234 – 1152 m³/h

Maximum volume flow rate, with LWA ≅ 50 dB(A)

170 – 1080 l/s or 612 – 3888 m³/h

Supply air to room air temperature difference

–12 to +15 K


Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.

The maximum volume flow rates apply to a sound power level of approx. 50 dB (A) with damper blade position 0°.

Exact values for all parameters can be determined with our Easy Product Finder design programme.

VDL-*-H-...-M, VDL-*-H-...-E*, sound power level and total differential pressure

Nominal size V Δpt LWA
Nominal size l/s m³/h Pa dB(A)

315

65

234

9

22

315

100

360

20

34

315

135

486

37

43

315

170

612

59

50

400

95

342

7

18

400

170

612

22

32

400

250

900

49

42

400

325

1170

82

50

630

235

846

8

23

630

365

1314

20

35

630

495

1782

38

44

630

625

2250

60

50

800

320

1152

8

24

800

470

1692

18

35

800

620

2232

31

43

800

765

2754

47

50


VDL-*-V-...-M, VDL-*-V-...-E*, VDL-*-F-M, sound power level and total differential pressure

Nominal size V Δpt LWA
Nominal size l/s m³/h Pa dB(A)

315

65

234

6

19

315

115

414

19

33

315

165

594

39

43

315

215

774

66

50

400

95

342

5

15

400

180

648

19

31

400

265

954

41

41

400

350

1260

71

50

630

235

846

6

16

630

405

1458

18

32

630

575

2070

36

43

630

730

2628

58

50

800

320

1152

7

20

800

500

1800

17

33

800

680

2448

32

43

800

865

3114

52

50


VDL-*-H-...-X, sound power level and total differential pressure

Nominal size V Δpt LWA
Nominal size l/s m³/h Pa dB(A)

315

65

234

7

16

315

115

414

23

32

315

165

594

48

43

315

210

756

78

50

400

95

342

7

14

400

180

648

26

32

400

265

954

57

44

400

325

1170

86

50

630

235

846

8

15

630

405

1458

23

33

630

575

2070

47

44

630

685

2466

67

50

800

320

1152

7

19

800

500

1800

17

32

800

930

3348

58

50

800

920

3312

57

50


VDL-*-V-...-X, VDL-*-F-X, sound power level and total differential pressure

Nominal size V Δpt LWA
Nominal size l/s m³/h Pa dB(A)

315

65

234

6

17

315

115

414

19

32

315

165

594

39

41

315

225

810

72

50

400

95

342

5

13

400

185

666

20

30

400

275

990

45

41

400

365

1314

79

50

630

235

846

5

15

630

440

1584

17

31

630

650

2700

49

47

630

840

3024

62

50

800

320

1152

4

22

800

570

2052

14

35

800

820

2952

28

43

800

1080

3888

49

50


Ceiling swirl diffuser with circular diffuser face for high rooms in comfort and industrial zones. For supply air only. With fixed air control blades for horizontal supply air discharge and with adjustable blades for air discharge from horizontal (0°) to vertical (90°). Horizontal air discharge with high induction. For freely suspended installation and for suspended ceilings.

Ready-to-install component which consists of the diffuser face, blades, duct collar or plenum box with side entry or top entry spigot, and suspension holes. Removable or non-removable diffuser face.

The removable diffuser face is fixed to the cross bar with a central screw, covered by a decorative cap.

Spigot suitable for ducts to EN 1506 or EN 13180.

Sound power level of the air-regenerated noise measured according to EN ISO 5135.

Special characteristics

  • For high rooms, with adjustable air control blades
  • Diffuser face with aerodynamically optimised contours
  • The air pattern can be adjusted manually or with an actuator
  • Horizontal or vertical duct connection

Materials and surfaces

  • Blades, casing, duct collar, extended border, plenum box and cross bar made of galvanised sheet steel
  • Diffuser face and decorative cap made of aluminium
  • Protective cage made of steel mesh
  • Blades, duct collar, extended border, plenum box, diffuser face and decorative cap powder-coated RAL 9010, pure white
  • P1: Powder-coated, RAL CLASSIC colour

Technical data

  • Nominal sizes: 315, 400, 630, 800 mm
  • Minimum volume flow rate: 65 – 320 l/s or 234 – 1152 m³/h
  • Maximum volume flow rate, with LWA ≅ 50 dB(A): 170 – 1080 l/s or 612 – 3888 m³/h
  • Supply air to room air temperature difference: –12 to +15 K

Sizing data

  • V _______________________ [m³/h]
  • Δpt _______________________ [Pa]

Air-regenerated noise

  • LWA _______________________ [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.

00133909_0

 Type
VDL       Swirl diffuser

 Construction style – diffuser face
A       Diffuser face without flange
B       Diffuser face with flange

 Connection
F       Diffuser face only
H       Horizontal, with plenum box
V       Vertical

 Accessories 1
       No entry: none
L       With lip seal (only for connection types V and H)

 Diffuser face
       Only in combination with connection H or V
N       Non-removable
D       Removable

 

 Accessories 2
       Only in combination with diffuser face construction style B, supplied separately
K       Extended border
S       Protective cage

 Adjustment
M       Manual
X       Without (fixed blades, only horizontal air discharge)
       Electric actuator
E1       230 V AC, 3-point
E2       24 V AC/DC, 3-point
E3       24 V AC/DC, modulating 2 – 10 V DC

 Nominal size [mm]
315
400
630
800

 Exposed surface of diffuser face
       No entry: powder-coated RAL 9010, pure white
P1       Powder-coated, specify RAL CLASSIC colour

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

Order example: VDL–B–H–L–S–D–E3/400/P1-RAL 9016

Construction style – diffuser face

With flange

Connection

Horizontal

Accessories 1

Lip seal

Diffuser face

Removable

Accessories 2

Protective cage

Adjustment

Electric actuator 24 V AC, 2 – 10 V DC

Nominal size

400 mm

Exposed surface of diffuser face

RAL 9016, traffic white, gloss level 70 %


 

Variants, Accessories, Dimensions and weight, Product details

  • Variants
  • Accessories
  • Dimensions and weight
  • Product details

VDL-A

Diffuser face VDL-A

  • Diffuser face without flange

Nominal sizes

  • 315, 400, 630, 800

VDL-B

Diffuser face VDL-B

  • Diffuser face with flange

Nominal sizes

  • 315, 400, 630, 800

VDL-*-F-X

Variant

  • Diffuser face with fixed air control blades

Nominal sizes

  • 315, 400, 630, 800

Parts and characteristics

  • Circular duct collar for connection to a vertical duct

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180

VDL-*-F-M

Variant

  • Diffuser face with alternately fixed and adjustable blades, for air discharge from horizontal (0°) to vertical (90°)

Nominal sizes

  • 315, 400, 630, 800

Parts and characteristics

  • Circular duct collar for connection to a vertical duct

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180

VDL-*-H-N

Variant

  • With plenum box for horizontal duct connection
  • Non-removable diffuser face

Nominal sizes

  • 315, 400, 630, 800

Parts and characteristics

  • Plenum box for horizontal duct connection
  • Lip seal (optional)

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal (if accessory lip seal has been ordered)

VDL-*-H-D

Variant

  • With plenum box for horizontal duct connection
  • Removable diffuser face
  • Actuator for blade adjustment, optional

Nominal sizes

  • 315, 400, 630, 800

Parts and characteristics

  • Plenum box for horizontal duct connection
  • Lip seal (optional)

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal (if accessory lip seal has been ordered)

VDL-*-V-N

Variant

  • With plenum box for vertical duct connection
  • Non-removable diffuser face

Nominal sizes

  • 630, 800

Parts and characteristics

  • Plenum box for vertical duct connection
  • Lip seal (optional)

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal (if accessory lip seal has been ordered)

VDL-*-V-D

Variant

  • With plenum box for vertical duct connection
  • Removable diffuser face
  • Actuator for blade adjustment, optional

Nominal sizes

  • 315, 400, 630, 800

Parts and characteristics

  • Plenum box for vertical duct connection
  • Lip seal (optional)

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal (if accessory lip seal has been ordered)

VDL-...-X, fixed

Variant Nominal size Variant
Variant mm
Variant 315 400 630 800 -L- -K- -S-

VDL-A-F-X

+

+

+

+

VDL-A-H-*-D-X

+

+

+

+

+

VDL-A-H-*-N-X

+

+

+

+

+

VDL-B-F-*-X

+

+

+

+

+

+

VDL-B-H-*-D-*-X

+

+

+

+

+

+

+

VDL-B-H-*-N-*-X

+

+

+

+

+

+

+

① Lip seal

② Extended border

③ Protective cage

+ Possible

 Not possible


VDL-...-M, manually adjustable

Variant Nominal size Variant
Variant mm
Variant 315 400 630 800 -L- -K- -S-

VDL-A-F-M

+

+

VDL-A-V-*-D-M

+

+

+

+

+

VDL-A-V-*-N-M

+

+

+

VDL-A-H-*-D-M

+

+

+

+

+

VDL-A-H-*-N-M

+

+

+

+

+

VDL-B-F-*-M

+

+

+

+

VDL-B-V-*-D-*-M

+

+

+

+

+

+

+

VDL-B-V-*-N-*-M

+

+

+

+

+

VDL-B-H-*-D-*-M

+

+

+

+

+

+

+

VDL-B-H-*-N-*-M

+

+

+

+

+

+

+

① Lip seal

② Extended border

③ Protective cage

+ Possible

 Not possible


VDL-...-E*, with actuator

Variant Nominal size Variant
Variant mm
Variant 315 400 630 800 -L- -K- -S-

VDL-A-V-*-D-E*

+

+

+

+

+

VDL-A-H-*-D-E*

+

+

+

+

+

VDL-B-V-*-D-*-E*

+

+

+

+

+

+

+

VDL-B-H-*-D-*-E*

+

+

+

+

+

+

+

① Lip seal

② Extended border

③ Protective cage

+ Possible

 Not possible


VDL-B-...-K

Accessories

  • Extended border
  • Only for diffuser faces with flange (VDL-B)

Nominal sizes

  • 315, 400, 630, 800

Parts and characteristics

  • An extended border supports the horizontal air discharge in cooling mode

VDL-B-...-S

Accessories

  • Protective cage
  • Only for diffuser faces with flange (VDL-B)

Nominal sizes

  • 315, 400, 630, 800

Parts and characteristics

  • A protective cage protects the blades, e.g. in gymnasiums



VDL-A, VDL-B

Nominal size
VDL-A
ØD1
mm
VDL-B
ØD1
mm
H1
mm
Aeff

315 464 494 42 0.022
400 567 597 45 0.031
630 871 901 51 0.077
800 1077 1107 55 0.106


VDL-*-F-X, VDL-*-F-M

Nominal size
H1
mm
H2
mm
ØD
mm
m
kg
315 42 103 313 3
400 45 112 398 4
630 51 153 628 11
800 55 174 798 19

VDL-*-F-M only nominal sizes 315, 400


VDL-*-H-N, VDL-*-H-D

Nominal size
H1
mm
□Q3
mm
H3
mm
H4
mm
ØD
mm
A
mm
C
mm
m
kg
315 42 435 432 282 248 290 65 11
400 45 500 536 368 313 351 65 16
630 51 750 761 468 398 526 65 35
800 55 1000 1026 568 498 741 65 59

Weights apply to the variant with actuator


VDL-*-V-N, VDL-*-V-D

Nominal size
VDL-*-V-N
H2
mm
VDL-*-V-D
H2
mm
H1
mm
ØD
mm
m
kg
315 219 42 313 6
400 228 45 398 8
630 316 316 51 628 19
800 483 483 55 798 33

Weights apply to the variant with actuator


VDL

Nominal size
VDL-A
ØD1
mm
VDL-B
ØD1
mm
H1
mm
Aeff

315 464 494 42 0.022
400 567 597 45 0.031
630 871 901 51 0.077
800 1077 1107 55 0.106


Installation examples, Installation details, Basic information and nomenclature

  • Installation examples
  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • Preferably for rooms with a clear height from 3.8 m
  • Flush ceiling installation
  • VDL-...-K: Also freely suspended installation
  • Ceiling distance of at least 300 mm allows for continuous adjustment of the air pattern
  • Horizontal or vertical duct connection

Installation information

  • Installation can be flush with the ceiling or freely suspended
  • If the VDL is mounted flush with an open cell ceiling, the resulting air pattern is the same as with freely suspended installation
  • Continuous adjustment of the air pattern using an actuator is only possible with freely suspended installation, installation flush with an open cell ceiling, or installation with the diffuser protruding from an open cell ceiling
  • Installation and making connections to be performed by others

These are only schematic diagrams to illustrate installation details.

Ceiling cut-out

Nominal size
Ød
mm
315 400
400 500
630 750
800 950


Principal dimensions

ØD [mm]

Outer diameter of the spigot

ØD₁ [mm]

Outer diameter of a circular diffuser face

ØD₂ [mm]

Diameter of a circular diffuser face style

ØD₃ [mm]

Diameter of a circular plenum box

□Q₁ [mm]

Outer diameter of a square diffuser face

□Q₂ [mm]

Dimensions of a square diffuser face style

□Q₃ [mm]

Dimensions of a square plenum box

H₁ [mm]

Distance (height) from the lower edge of the suspended ceiling to the lower edge of the diffuser face

H₂ [mm]

Height of a ceiling diffuser, from the lower edge of the suspended ceiling to the upper edge of the spigot

H₃ [mm]

Height of a ceiling diffuser with plenum box, from the lower edge of the suspended ceiling to the upper edge of the plenum box or of the spigot

A [mm]

Position of the spigot, defined by the distance of the spigot centre line to the lower edge of the suspended ceiling

C [mm]

Length of the spigot

m [kg]

Weight

Nomenclature

LWA [dB(A)]

A-weighted sound power level of air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

Δtz [K]

Supply air to room air temperature difference, i.e. supply air temperature minus room temperature

Δpt [Pa]

Total differential pressure

Aeff [m²]

Effective air discharge area


All sound power levels are based on 1 pW.

Nedladdningar

  • produkt information

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