Dubai Head Office:Tel: +971 4 706 9777Fax: +971 4 706 9787

Abu Dhabi Branch:Tel: +971 2 645 0107Fax: +971 2 645 0167

Saudi Arabia:Tel: +966 1 265 4551Fax: +966 1 265 4550

Email: betai@betag.comP.O.Box 50708, DubaiUnited Arab Emirates

LINEAR SLOT DIFFUSERS

WE SHAPE

AIR

Cert. No. 5599/2017Environmental

REGISTERED

ISO-9001

index

LINEAR SOLT DIFFUSERS

PERFORMANCE DATA

>>

>>

1 - 3

4 - 6

01

LINEAR SLOT DIFFUSERS

• Flush - mounted linear diffuser.

• Available in 1 to 6 slots.

• Lengths are available on request.

• 180° fully adjustable air flow pattern by mean

of two air deflector per slot.

• Available with hit-and-miss damper which

controls the air flow rate without affecting the

air flow pattern and works as an equalizing

grid.

• For each slot the air deflector and hit-and-miss

damper are individually adjustable.

• Removable straight type end cap allows

extending or shortening slot diffuser line

without replacing existing pieces.

• The deflector and the hit and miss damper are

powder coated with black color as standard.

• Linear slot diffuser is powder coated to RAL

codes. Also can be in anodized finish.

PLENUMBY OTHERS

HANGING BRIDGEBRACKET BY OTHERS

ADJUSTABLE SCREWBY OTHERS

SUPPORTINGCLAMPS

FALSE CELINGBY OTHERS SLOT DIFFUSER

DUCT/PLENUM END

U-SHAPED BRACKET FIXEDAT X+5MM DISTANCE FROMDUCT/PLENUM END BYINSTALLER

SLOT LINEAR DIFFUSER

SCREW FOR FIXINGTHE DIFFUSER INTODUCT/LPENUM END

ADJUSTABLE U-CHANNEL

LINEAR SLOT DIFFUSER FIXING DETAILS

Deflectors & Air Pattern

SLD , RLD

• Available in 1 to 6 slot

• Available in any combination of X.Y

(X-300 mm, Y=300 mm as Standard)

Corner pieces

° : 45°, 90°, 135°

02

END CAPS & CORNERS

LINEAR SLOT DIFFUSERS

END CAPS FOR LINEAR SLOT DIFFUSERS

STRAIGHT END-CAP (RLD & SLD)

Length of Diffuser

28.5 mm28.5 mm

18.2 mm

28.5 mmA

A 28.5 mmFrame

Hit & MissDamper

Section A-A

Fla

ng

e S

ize

Slo

t W

idth

Nec

k S

izeCore

55.0

A) Slot diffuser dimensions with STRAIGHT END CAP:

* Above dimension with ± 1.5 mm tolerance.

Number of slots

Slot Width, mm

Neck Dimension, mm

Face Dimension, mm

1

16

43

71

20

48

78

25

53

83

16

79

108

20

86

115

25

97

127

16

113

144

20

124

154

25

140

171

16

148

176

20

162

191

25

184

213

16

180

209

20

200

230

25

228

258

16

214

242

20

238

271

25

271

310

2 3 4 5 6

B) Slot diffuser dimensions with MITERED END CAP:

* Above dimension with ± 1.5 mm tolerance.

Number of slots

Slot Width, mm

Neck Dimension, mm

Face Dimension, mm

1

16

35

79

20

40

84

25

45

89

16

71

115

20

78

121

25

89

133

16

105

149

20

116

161

25

133

178

16

140

184

20

155

200

25

177

221

16

172

216

20

193

236

25

221

265

16

206

250

20

232

275

25

264

308

2 3 4 5 6

31.8 mm

31.8 mm

A

A

18.2 mm

31.8 mm31.8 mm

Frame

Core

Section A-A

55.0

Hit & MissDamper

Fla

ng

e S

ize

Nec

k S

ize

Slo

t W

idth

MITERED END-CAP (RLD45 & SLD45)

Length of Diffuser

X

Y

03

LINEAR SLOT DIFFUSERS

CURVED LINEAR SLOT DIFFUSER

CURVED OPENING FOR CURVED LINEAR SLOT DIFFUSER

R1

R2

R3

Minim

um R

adius

: 2 M

eter

Note: * Please specify the proper radius (R1, R2 or R3) when ordering curved linear slot diffusers.

Ordering Key:

R L D F CRV 1.5m * 3SLT (20)SLD: SUPPLY LINEAR DIFFUSER

(WITH AIR PATTERN DEFLECTORS

AND HIT & MISS DAMPER)

RLD: RETURN LINEAR DIFFUSER (WITH

SQUARE PUNCHED STRIP, WITHOUT

DEFLECTORS & HIT & MISS DAMPER)

SLD/RLD: COMBINED

--: STRAIGHT END CAPS

F: WITH FLANGE WIDTH 13.4MM

45: MITERED END CAPS

--: STRAIGHT LINEAR DIFFUSER

CRV: CURVED LINEAR DIFFUSER (ONLY WITH RLD)

COR: CORNER (STANARD WITH 2 X 300MM SIDES & 90° ANGLE, OTHER

SIDES & ANGLES CAN BE FABRICATED);

EXAMPLE: RLD/COR 300MM*300MM (90)*2SLT(16)

LENGTH IN METER

NUMBER OF SLOTS

SLOT WIDTH: 16MM, 20MM (STANDARD) OR 25MM

04

PERFORMANCE DATA

LINEAR SLOT DIFFUSERS

507510012515017520050100150200250300350100150200250300350400150200250300350400450200250300350400450500250300350400450500600

0.082

0.221

0.321

0.402

0.490

0.578

0.0230.0520.0920.1440.2100.2850.3770.0080.0300.0670.1200.1870.2700.3700.0140.0310.0550.0860.1240.1680.2200.0190.0330.0520.0750.1020.1330.1700.0220.0340.0490.0670.0870.1100.1360.0240.0350.0480.0620.0790.0980.140

1

2

3

4

5

6

0.0360.0810.1440.2250.3280.4450.5890.0130.0470.1050.1880.2920.4220.5780.0220.0480.0860.1340.1940.2630.3440.0300.0520.0810.1170.1590.2080.2660.0340.0530.0770.1050.1360.1720.2130.0380.0550.0750.0970.1230.1530.219

123557812345671234568134567823456782345678

35789101113467892356789245678944567893456789

------------------------------------------

------------------------------------------

------------------------------------------

------------------------------------------

------------------------------------------

------------------------------------------

579111212142468910113468910115677891067889910667891011

123456711134561124567123445612345671234567

<15162329364046

<15172335414954

<15172331384348

<15172328343641

<15162026303439

<15161923262939

0.066

0.175

0.254

0.320

0.389

0.455

SLO

TS

A k

/ m

(Ft2 /

m)

A k

/ m

(Ft2 /

m)

0.102

0.270

0.393

0.495

0.602

0.708

A k

/ m

(Ft2 /

m)

PS

(IWG)PS

(IWG)

0.0100.0230.0410.0610.0860.1130.1500.0060.0120.0390.0820.1260.1940.2660.0090.0240.0380.0490.0810.1090.1420.0090.0200.0360.0430.0770.1020.1210.0130.0210.0390.0510.0690.0740.1110.0170.0260.0330.0480.0580.0670.106

PS

(IWG)Throw

(Ft)Throw

(Ft)

SLOT WIDTH3/5" 4/5" 1"

NC

<15152227333641

<15162232374347

<15162229343842

<15162226313337

<15152025283135

<15151822252735

NC

<15<15<1518232630

<15<151722263134

<15<151620242730

<15<15<1518222326

<15<151517192225

<15<15<1516171825

NC

CFMPER

METER

356789

1011356781245678234567833456782345678

579

10111213225789

10236789

1055667895667889556789

10

123345611123451123456112344511234561123456

Throw(Ft)

355678911245671134567123456722345671234567

5789

10111212367891256789234567845567783456789

VERTICAL DISCHARGE SLD / RLD - SUPPLY

CFM Per Meter : Air volume in cubic feet per 1 meter length

Ak : Effective face area in square feet per meter

Ps : Static pressure in inch water gauge

Th : Throw in feet NC : Noise Criteria

SYMBOLS* Supply* Vertical Discharge flow pattern* Noise Criteria Values are based on (10 dB) room attenuation.* Damper is fully open* The tested specimens were of 1 meter length

CONDITIONS* The large throw values are based on the minumum terminal velocity of 50 fpm.* The middle throw values are based on the middle terminal velocity of 100 fpm* The small throw values are based on the maximum terminal velocity of 150 fpm.

NOTES

05

LINEAR SLOT DIFFUSERS

PERFORMANCE DATA

0.059

0.150

0.240

0.324

0.410

0.494

1

2

3

4

5

6

0.046

0.119

0.191

0.257

0.323

0.389

SLO

TS

A k

/ m

(Ft2 /

m)

A k

/ m

(Ft2 /

m)

0.076

0.185

0.297

0.399

0.508

0.611

A k

/ m

(Ft2 /

m)

PS

(IWG)PS

(IWG)PS

(IWG)Throw

(Ft)Throw

(Ft)

SLOT WIDTH3/5" 4/5" 1"

NC NC NC

CFMPER

METER

469131751012182359131822610131823711141923811151923

8101421268172228331118232934151822283416202329331620243034

1357103347103458123458104681011468911

Throw(Ft)

3581215591116215812162059111621610121721710131721

------------------------------

------------------------------

79

1319237

152025301015212631131620253114182126301418212731

507510012515050100150200250100150200250300150200250300350200250300350400250300350400450

0.0480.1090.1950.3050.4380.0160.0630.1410.2470.3910.0310.0690.1220.1910.2910.0390.0690.1080.1560.2110.0530.0810.1170.1590.2090.0630.0890.1220.1590.203

1469143561014467101556710146810131568101113

------------------------------

------------------------------

471015196111320256101520247111520258131621251012172125

8111523299192530351220253236171924303718222532361823273337

172636434918203445511624344348192633394521283338442330343943

0.0310.0700.1250.1950.2800.0100.0400.0900.1580.2500.0200.0440.0780.1220.1860.0250.0440.0690.1000.1350.0340.0520.0750.1020.1340.0400.0570.0780.1020.130

13581234581235691345691257911135791012

------------------------------

------------------------------

1825333843

<15203140451723313842192530354021263034392228313538

0.0200.0450.0800.1250.1790.0060.0260.0580.1010.1600.0130.0280.0500.0780.1190.0160.0280.0440.0640.0860.0220.0330.0480.0650.0860.0260.0360.0500.0650.083

<1517232731

<15<15222933

<1515222730

<1517212529

<1518212428

<1519222527

HORIZONTAL DISCHARGE SLD / RLD - SUPPLY

CFM Per Meter : Air volume in cubic feet per 1 meter length

Ak : Effective face area in square feet per meter

Ps : Static pressure in inch water gauge

Th : Throw in feet NC : Noise Criteria

SYMBOLS* Supply* Horizontal Discharge flow pattern* Noise Criteria Values are based on (10 dB) room attenuation.* Damper is fully open* The tested specimens were of 1 meter length

CONDITIONS* The large throw values are based on the minumum terminal velocity of 50 fpm.* The middle throw values are based on the middle terminal velocity of 100 fpm* The small throw values are based on the maximum terminal velocity of 150 fpm.

NOTES

06

PERFORMANCE DATA

LINEAR SLOT DIFFUSERS

SLOT WIDTH

1

2

3

4

5

6

75

100

125

150

175

150

175

200

250

300

200

250

300

350

450

300

350

400

500

600

300

400

500

600

700

400

500

600

700

800

0.133

0.234

0.359

0.544

0.734

0.156

0.228

0.283

0.438

0.625

0.156

0.244

0.352

0.478

0.794

0.250

0.339

0.438

0.661

0.981

0.175

0.309

0.484

0.695

0.945

0.244

0.380

0.547

0.742

0.972

SLOTSCFM PERMETER

Neg. PS

(IWG)

0.085

0.150

0.230

0.348

0.470

0.100

0.146

0.181

0.280

0.400

0.100

0.156

0.225

0.306

0.508

0.160

0.217

0.280

0.423

0.628

0.112

0.198

0.310

0.445

0.605

0.156

0.243

0.350

0.475

0.622

Neg. PS

(IWG)

0.054

0.096

0.147

0.223

0.301

0.064

0.093

0.116

0.179

0.256

0.064

0.100

0.144

0.196

0.325

0.102

0.139

0.179

0.271

0.402

0.072

0.127

0.198

0.285

0.387

0.100

0.156

0.224

0.304

0.398

Neg. PS

(IWG)

19

26

35

44

50

19

26

31

40

48

20

28

34

41

49

23

30

35

43

50

21

30

38

43

50

24

31

39

44

50

NC

19

25

32

39

44

19

25

29

36

42

20

26

31

37

43

22

28

32

38

44

21

28

34

38

44

23

29

35

39

44

NC

<15

17

22

28

32

<15

17

20

26

30

<15

18

22

26

31

<15

19

22

27

32

<15

19

24

27

32

15

20

25

28

32

NC

3/5" 4/5" 1"

SLD / RLD - RETURN

CFM Per Meter : Air volume in cubic feet per 1 meter lengthPs : Negative static pressure in inch water gaugeNC : Noise Criteria

SYMBOLS* Return* Noise Criteria Values are based on (10 dB) room attenuation.* Damper is fully open* The tested specimens were of 1 meter length

CONDITIONS

Dubai Head Office:Tel: +971 4 706 9777Fax: +971 4 706 9787

Abu Dhabi Branch:Tel: +971 2 645 0107Fax: +971 2 645 0167

Saudi Arabia:Tel: +966 1 265 4551Fax: +966 1 265 4550

Email: betai@betag.comP.O.Box 50708, DubaiUnited Arab Emirates

LINEAR SLOT DIFFUSERS

WE SHAPE

AIR

Cert. No. 5599/2017Environmental

REGISTERED

ISO-9001