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DRC2 Circular diffusers with adjustable cones

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					DRC2 Circular diffusers with adjustable cones
Specification
Model DRC2 adjustable multi cone aluminium diffuser is available in sizes from 100mm to 630mm diameter and provides a modern and stylish alternative to square and rectangular diffusers. They provide the ideal solution for environments requiring horizontal (cooling) and vertical (heating) air stream patterns. The DRC2 is suitable for installation in ceilings both for supply and extract systems. The standard colour is RAL9010 white, but other colours are available on request. The DRC2 diffuser can be regulated by the addition of a butterfly damper (V2) or a collecting gate damper (V3) shown below. Both dampers can be adjusted from the face of the diffuser at commissioning. Each diffuser is fitted by fixings from the rear with an option (DRC2T) of a fitted quanda plate (tile size) face with a neck measurement ranging from 160mm through to 315mm diameter.

Order Example
model diameter gate full example DRC2 250 V2 DRC2 250 + V2
heating - vertical cooling - horizontal

Aerodynamic, Adjustable & Silent

DRC2
Circular diffuser

DRC2 V2
Circular diffuser + butterfly damper

DRC2 V3
Circular diffuser + collecting gate

DRC2 T
Circular diffuser with quanda plate 595 x 595

V2
Butterfly damper

V3
collecting gate

Technical Dimensions
Dia. N
Dia. A

DRC2

V2

Butterfly Damper

V3

Split Collecting Gate Damper

D

Dia - 3 mm.

Dia. B
Dia. C
Dia. N

35

1/2

Dia - 4 mm

Rated Dia.

Dia. A

DRC2T

Diam. N. (mm) 100 160 200 250 315 355 400 450 500 630

A 98 158 198 248 313 353 398 448 498 628

B 195 300 370 470 573 650 695 743 812 955

C 230 335 423 517 640 730 776 825 917 1045

D 75 105 118 130 146 185 185 185 185 185

No Cones 2 3 3 3 3 3 4 4 4 5

Panel 596 x 596
Tile T-Bar 600 x 600

A = 160 - 315mm diameter • B = Ceiling ope requirement

22

35

6

D R C 2 C i r c u l a r d i f f u s e r s w i t h a d j u s t a b l e c o n e s PERFORMANCE DATA

LT

HI 2.7 ±0.3

Only valid for ceiling applications
1.8

VK VT

VR

DAMPER OPENING 10%

VK
3 /h m

Pt
36 24

6

VT VR

0.50 0.17

7 6 5

4
400

3800 2900 2500 1 2000 0.8 1800 0.7 1600 0.6 1400 0.5 1200 1000 0.4 900 0.35 800 0.3 700 600 0.25
500

Q
m
3

/s

5
4 NR 5

4
4 NR 0

17 13 10 7

3.5
35 NR 30

3 2.5

0.2

3

300

0.18 0.16 0.14 0.12 0.10

NR

2 NR

5

2
20 NR

4 Po

0.08 2
200

0.07 0.06

150
125

0.05 0.045

1

0.04 0.035

EXAMPLE Q = 0.25 m3/s air volume LT = 2.5m throw VT = 0.25 m/s terminal velocity SELECTION Model = VK = NR = Pt (100%) =

DRC2 Ø 400 2.6 m/s velocity 26 sound level 26 Pa total pressure

LT
DNø 150 200 250 300 350 450 400 500 630
SYMBOLS Q = Airflow rate (m3/s or h3/s) VK = air supply velocity (m/s) Pt = pressure drop (Pa) Lt = throw (m) NR = sound level VT = terminal velocity VR = occupied zone relative velocity (m/s) HI = room height (m) øDN = diffuser nominal diameter (mm)

Q

VK NR

øDN

LT

Ø DN

23

DR SVT Circular diffusers with fixed cones & gates

Construction, fitting and how to order
• Airtight extruded aluminium diffuser with fixed cones. Diffuser DR SVT is suitable for installation on the ceiling for both supply and exhaust and comes complete with butterfly damper. • Standard anodised finish in natural aluminium colour. • Paint finish to any RAL or BS specifications. • Regulation of butterfly gate is adjustable from the front of the diffuser by means of manual pressure. • Side hinged collecting gate (V3) for fitting on the sleeve's entry secured with screws at the side, can be provided as an alternative to the butterfly gate damper. • The diffuser is installed by concealed means at the rear of the unit on site. - model - diameter - damper - full example DR SVT 160 Included (butterfly type) DR SVT 160 circular diffuser complete with damper

Technical Dimensions

DR SVT
Nominal duct size sleeve

V3 (alternate damper)

Fitting example with flexible duct

Dia. N.

Dia. A
Butterfly Damper
Rated Dia A B C No. Cones

160

159

213

247

35

Dia. N

3

52

200

199 249

264 315

287 337

4 5

Dia. B
Dia. C
315 355 314 354 366 417 402 442 6 7

5

250

400

399

462

487

8

B = Ceiling ope required
Dimensions are in mm

24

D R S V T C i r c u l a r d i f f u s e r s w i t h f i x e d c o n e s & g a t e s TECHNICAL DATA

Diagram determining the size, induction and temperature of the air jet flow of the DR SVT

Pressure Drop Diagram

Effective discharge velocity Vef (m/s)
10 4000 3500 400 355 3000 2500 2000 9 8 7 6 5 4 3 2

100

25%

Opened 50% 100%

50
45 45 40

40
Pressure drop ∆Pcel (PA)

315

1500

40

30 20
30

R=

500 300 160 300 200 150

5 2 3 4 5 6 7 8 9 10

Air flow Q (m3/h)
0.1

Effective discharge velocity vef (m/s)

0.2

0.3

10

Air jet velocity VL (m/s)

0.3 0.4 0.5 0.75 1

0.2

Air

jet

ve loc

ity

0.1 5

b0

2( m

)

4 4 3

Q (m3/h) L (m) Vef (m/s) VL (m/s) b0.2(m)

2

Throw distance L (m)

Air flow Throw distance Face Velocity Terminating Velocity Width of the air jet is measured at a distance from ceiling where air flow velocity is 0.2 m/s

1 0.5

Example Shown DR SVT 315mm diameter c/w damper Airflow = 1000m3hr Throw = 3m Terminating velocity = .3m/s Face velocity = 7.2 m/s Pressure drop = 32Pa (damper fully opened) NR level = 40

25

LW

A=

200

N

(dB

(A ))

10

25

25

30

250

1000

Regulation Set-up

35

35


				
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Description: DRC2 Circular diffusers with adjustable cones