Square swirl diffuser NWK-2

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Square swirl diffuser NWK-2

Description and application

Square swirl diffuser NWK-2 on the square panel is used for ventilation and air conditioning industrial and public buildings with a height of 2.5 m - 4.5 m, such as offices, hotels, cinemas, conference rooms, supermarkets.

They are characterized by easy assembly in suspended ceilings, plenum boxes or directly on rectangular ducts. Assembly is done using visible screws in the corners of the faceplate or using a central mounting. By appropriate location of the slots in the faceplate we get a swirling motion to the air flow. By using movable plastic blades it can also adjust the flow direction of air flow.

Material and workmanship

Diffusers are made of galvanized sheet steel powder coated, standard on the white color 9016 or on request to any color from the RAL palette and special execution of stainless steel or aluminum. NWK-2 in supply air version have plastic blades located in each of the slots , with individually settings. Blades are standard in color black (on request there is possible to put the blades in white). Version extract air don’t have a blades regulators.

Square swirl diffuser has Hygienic Certificate HK/K/0522/01/2016

400/16

A

Size

The diffusers are manufactured on order.

Examples dimensions of the diffusers are given in the table.

Size

A

Quantity of

blades

2

Aef(m )

300x300 8 0,012 400x400 8 0,012 400x400 16 0,024 500x500 8 0,012 500x500 16 0,024 500x500 24 0,036 600x600 24 0,036 595x595 24 0,036 600x600 32 0,048 595x595 32 0,048 600x600 48 0,072 595x595 48 0,072 625x625 24 0,036 625x625 32 0,048 625x625 48 0,072 825x825 72 0,108

Technical data

NWK-2 (16) NWK-2 (8) NWK-2 (24) NWK-2 (32) NWK-2 (48) NWK-2 (72) Quick selection diffusers NWK-2 for LWA<40dB

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400/8 400/16 300/8 500/8 600/16, 625/16 500/24 600/8, 625/8 500/16 600/24, 625/24 600/32, 625/32 600/48, 625/48 825/72

Accessories- plenum box

Plenum box is made of galvanized steel. On request it can be equipped with a damper control onto the connected spigot. The plenum box can be isolated inside with rubber (acoustic) or outside with mineral wool (thermal). In the standard height of the plenum box is adapted to size of the spigot or diffuser size (you can specify the height of the plenum box).

Dimensions - examples of the arrangement blades

Square swirl diffuser NWK-2

H

d

C

A

B= C+30 Rectangular plenum box with the spigot on the top

fd

15

H

1

15

adjustable damper on the spigot

Rectangular plenum box with the spigot on the side

fd

15

H

2

15

Other sizes are produced on customer request

Size A

C

H

1

H

2

f

d

300x300 265x265 310 280 158 400x400 365x365 310 280 158 500x500 465x465 310 280 198 595x595 560x560 310 330 248 600x600 565x565 310 330 248 625x625 590x590 310 330 248 825x825 790x790 310 380 313

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W1

Assembly visible using screws and the mounting holes in the corners of diffuser faceplate.

W2

Assembly invisible on the construction of the suspended ceiling - diffuser panel 595x595 - diffuser without mounting holes

in the panel.

Central assembly through the crossbar (WMC) mounted in the plenum box and the central mounting screw.

W3

H

d

C central screw

Methods of mounting

Square swirl diffuser NWK-2

Workmanship - the setting variants of blades and direction of air flow

airflow vertical leftside set-up leftside set-up rightside set-up rightside set-up Airflow vertical Airflow rightsided Airflow leftsided

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H0 3 Q(m /h) 3 Q(m /h) 1,7m

occupied zone 1,7m

H=2,5-4,5m

Technical data

Marking:

X [m]-distance between the diffusers (length)

Y [m]-distance between the diffusers (width)

[m /h]- air volume flow

3

Q

[dB(A)]- acoustic power level

WA

L

D

P

[Pa]- pressure drop

[m]- height from the ceiling to the occupied zone

H

0

[m/s]- air velocity at the height of H

V

H0 0

X,Y

Pressure drop and acoustic power

Plenum box with spigot : top side

Size : 300/8, 400/8, 500/8, 600/8

Size : 400/16, 500/16, 600/16, 625/16

NWK-2 NWK-3

NWO-2

NWO-3

Q [m / h]3 100 200 300 400 500 20 30 40 50 60 L W A [dB(A)] 8 16 20 30 45 60 80 100 P [Pa] Q [m / h]3 200 300 400 500 600 20 30 40 50 60 L W A [dB(A)] 8 16 20 30 45 60 80 100 P [Pa]

The angle of damper regulation 90°

12 12

The angle of damper regulation 45

°

The angle of damper regulation

90°

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Size : 500/24, 600/24, 625/24

Size : 600/32, 625/32

NWK-2 NWK-3

NWO-2

NWO-3

Size : 600x600/48

Size : 825x825/72

Q [m / h]3 600 1100 1300 1500 2000 20 30 40 50 60 L W A [dB(A)] 5 15 20 30 40 60 80 100 P [Pa] 700 900

The angle of damper regulation 45°

°

10

Marking:

3

Q [m /h]- air volume flow

L [dB(A)]- acoustic power level

WA

P [Pa]- pressure drop

D

Q [m / h]3 300 600 700 800 1000 20 30 40 50 60 L W A [dB(A)] 8 18 25 35 45 60 80 100 P [Pa] 400 500

90 ° Q [m / h]3 300 700 900 1000 1100 20 30 40 50 60 L W A [dB(A)] 8 18 25 35 45 60 80 100 P [Pa] 400 500 12 12

45

°

90

° The angle of damper regulation

45

°

Pressure drop and acoustic power

Plenum box with spigot : top side

Q [m / h]3 300 600 800 1000 1200 20 30 40 50 60 L W A [dB(A)] 5 20 30 40 45 60 80 100 P [Pa] 400 500 Kąt regulacji przepustnicy 45° Kąt regulacji przepustnicy 90° 15

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Dependence of the air velocity from stream range

1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8

Size : 300/8, 400/8, 500/8, 600/8

Spacing between diffusers Y=2,5 do 3,5 m

V H0 [m/s] X [m] 1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8 V H0 [m/s] X [m]

Spacing between diffusers Y>4 m

350 m /h 400 m /h 3 3 3 200 m /h 3 300 m /h 1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8

Size : 400/16, 500/16, 600/16, 625/16

V H0 [m/s] X [m] 400 m /h 550 m /h 650 m /h 3 3 3 1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8 V H0 [m/s] X [m] 200 m /h 300 m /h 400 m /h 3 3 3

550 m /h 3 150 m /h 3 350 m /h 400 m /h 3 3 3 200 m /h 3 300 m /h 3 250 m /h 300 m /h 3 500 m /h 3 500 m /h 3

NWK-2 NWK-3

NWO-2

NWO-3

Marking:

X [m.]-distance between the diffusers (length)

Y [m.]-distance between the diffusers (width)

[m /h]- air volume flow

3

Q

[m.]- height from the ceiling to the occupied zone

H

0

[m/s]- air velocity at the height of H

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1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8

Size : 500/24, 600/24, 625/24

V

H0

[m/s]

X [m]

Size : 600/32, 625/32

Spacing between diffusers Y=2,5 do 3,5 m Spacing between diffusers Y>4 m

3 350 m /h 3 700 m /h 0,50 0,60 3 1000 m /h 3 500 m /h 1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8 V H0 [m/s] X [m] 3 350 m /h 3 700 m /h 0,50 0,60 3 1000 m /h 3 500 m /h 1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8 V H0 [m/s] X [m] 0,50 0,60 1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8 V H0 [m/s] X [m] 800 m /h 0,50 0,60 3 600 m /h 1000 m /h 1200 m /h

NWK-2 NWK-3

NWO-2

NWO-3

400 m /h3 3 3 3 3 600 m /h 800 m /h3 1000 m /h3 1200 m /h3 400 m /h3

Dependence of the air velocity from stream range

Marking:

X [m]-distance between the diffusers (length)

Y [m]-distance between the diffusers (width)

Q [m /h]- air volume flow

3

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1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8

Size : 600x600/48

V

H0

[m/s]

X [m]

3 400 m /h 3 1000 m /h 0,50 0,60 3 1200 m /h 3 700 m /h 3 1400 m /h 1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8 V H0 [m/s] X [m] 3 400 m /h 3 700 m /h 0,50 0,60 3 1000 m /h 3 1200 m /h 300 m /h 3 1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8

Size: 825x825/72

V

H0

[m/s]

X [m]

3 600 m /h 3 1200 m /h 0,50 0,60 3 1400 m /h 3 800 m /h 3 1600 m /h 1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8 V H0 [m/s] X [m] 0,50 0,60 3 800 m /h 3 900 m /h 600 m /h 3 800 m /h 3 700 m /h 3 900 m /h 3 1600 m /h 3 1000 m /h 3 1200 m /h 3

NWK-2 NWK-3

NWO-2

NWO-3

1800 m /h 3 700 m /h 3 3 1800 m /h

Dependence of the air velocity from stream range

Marking:

X [m]-distance between the diffusers (length)

Y [m]-distance between the diffusers (width)

Q [m /h]- air volume flow

3

H [m]- height from the ceiling to the occupied zone

0

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NWK-2 NWK-3

NWO-2

NWO-3

100 200 300 400 500 600 700 800 Q [m³/h] 900 NWK-3 (16) NWK-3 (8) 1000 1100 1200 1300 1400 NWK-3 (24) NWK-3 (32) NWK-3 (48) NWK-3 (72)

EXAMPLE

Reading from a graph:

Appropriate diffusers 32 and 48 blades (72 blades only in plates 825x825)

• selected diffuser NWK-3 (48 blades)

EXAMPLE • plate 600x600 3 • diffuser efficiency Q=700 m /h Q [m / h]3 300 600 800 1000 1200 20 30 40 50 60 L W A [dB(A)] 5 20 30 40 50 60 80 100 P [Pa] Size : 600x600/48 400 500

45

°

15

Reading from the graph:

• acoustic power LWA= 35 dB

• pressure drop Δp=30 Pa

EXAMPLE

• plenum box with top spigot

• damper - full opening (90°)

3

• diffuser efficiencyQ=700 m /h

Plenum box with spigot: top

Size : 600x600/48

Spacing between diffusersY=2,5 do 3,5 m

1,0 2,0 4,0 6,0 0,10 0,20 0,30 0,40 1,0 1,2 1,4 1,6 2,0 H0 [m] 0,8 V H0 [m/s] X [m] 3 400 m /h 3 700 m /h 0,50 0,60 3 1000 m /h 3 1200 m /h 300 m /h 3

Reading from the graph:

• air velocity VH0= 0,20 m/s

EXAMPLE

• Spacing between diffusers Y= 3,5m

• Spacing between diffusers X= 2,4m

• room height H= 3,2m

• height from the ceiling to the occupied

zone H0= H-1,7m= 3,2m- 1,7m= 1,5m

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Square swirl diffuser NWK-2

NWK-2 / 'N' / 'L' / 'P' / 'RAL' / 'M' / 'W' + 'SR' / 'I' / 'P' / 'K' / 'H'

'N' 'L' 'P' 'RAL' 'M' 'W' 'SR' 'I' 'P' 'K' 'H'

the size of the diffuser: 300, 400, 500, 595, 600, 625, 800, 825 quantity of blades 8, 16, 24, 32, 48, 54, 72

purpose of the diffuser:

Nc - supply air (diffuser equipped with black blades)* Nb - supply air (diffuser equipped with white blades) W - extract air (diffuser without blades)

diffuser color according to RAL palette (standard RAL9016*) material:

ST - powder coated steel* AL - aluminum powder coated

KO - stainless steel / acid proof steel (type 1.4301 or 1.4404)

mounting option:

W1 - assembly invisible on the construction of the suspended ceiling W2 - visible assembly with screws

W3 - the central assembly using the crossbar (in plenum box)

plenum box:

SR-Gc - plenum box with top spigot connection SR-Bc - plenum box with side spigot connection

isolation:

none - plenum box without isolation* Iz - outside isolation (thermal) Iw - inside isolation (acoustic)

adjustment damper at spigot connection:

none - no damper*

P - damper on spigot connection adjustable from the outside PP - damper on spigot connection adjustable from the inside

diameter spigot connection in size mm the height of the plenum box in mm*

* - If you don’t give the information will be used standard parameters.