linear slot diffusers and bar grilles

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LINEAR SLOT DIFFUSERS & BAR GRILLES

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LINEAR SLOT DIFFUSERS

& GRILLES

APPLICATION

Shahrokhi linear slot diffusers & grilles are

designed to suit H.V.A.C applications for

ceiling mounting.Linear attractive view of these grilles

considered in continuous architectural and

internal decoration such as Amphitheatres ,

Conference halls, Banks, Hotels and etc

(figure 1).

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SH.LIN.M

DESCRIPTION

These diffusers constructed in 1 through 8

slots and maximum up to 3m. length.

Other preferences in these diffusers are light

weight , easy and quick installation.These diffusers are used for supply, return

and exhaust air.

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(FIGURE 2)

NO.OF

SLOTS1

36 71 106 140 175 210 245 280A

86 121 156 190 225 260 295 330B

2 3 4 5 6 7 8

A=LISTED SIZE-12.5

B20.0

ALL DIMENSION IN mm.

33.0

60.0

(FIGURE 4)

For over lengths and connection several

grilles use special pieces (Alignment strips)

(figure 3).

Either is possible to closed air flow path by

using special endcaps on right, left or behind

sides of diffusers (figure 4).Select the type of endcaps is relative to

installatin of diffusers location.

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(FIGURE 3)

ALIGNMENT STRIP

WITHOUT END CAP

BLANK OFF SHEET

END CAP ON BOTH

STRAIGHT CUT

END CAP ARRANGEMENT

END CAP 45 CUT

(RIGHT OR LEFT)

It may be connected the diffusers in corners

with any request angles by using prepared

pieces (figure 5).

Moved and adjustable deflector blades of

this type of linear diffuser cause to diffusion

with horizontal and vertical airflow patterns

(figure 6).

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(FIGURE 5)

(FIGURE 6)

VARIABLE

90

HORIZONTAL

LEFT

HORIZONTAL

RIGHT

VERTICAL

Dampers of these type of diffusers in

receprocating way are used to adjust or

close air flow rate if necessary (figure 7).

To suit associate airvolume behind the

diffusers use plenum boxes and so ensure

uniform and continuous air distribution along

the diffusers (figure 8).

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(FIGURE 7)

(FIGURE 8)

FRAME

DAMPERS

DEFLECTORS

The plenum boxes can be equipped with

thermal or accoustic insulations (figure 9).

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MATERIAL & FINISH

High quality 1.25mm. thickness extruded

aluminium profile in matt aluminium

anodized finish for blades and frame.Plenum boxes made of 0.7mm. thickness

galvanized iron.White polyester liquid or powder coating

finish is also available or any other specified

color with raul code up on requirement.

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NO.OF

SLOTS1

300

50

300

85

300

125

300

160

350

195

400

230

400

265

400

300

H

W

2 3 4 5 6 7 8

123 148 198 198 248 298 298 298

OD

OD

OD

(FIGURE 9)


50

H

W W

H+

50

W+50

�� SHAHROKHI MANUFACTURING CO.SHAHROKHIb

ORDERING CODE

DIFFUSERS FIXING DETAILS

Shahrokhi linear slot diffusers & grilles with

following ordering code are specified.

A) The (figure 10) shows diffuser fixing

method over the pelnum box.B) The (figure 11) shows diffuser fixing

method over the duct or ceiling.

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SH : Shahrokhi manufacture

LIN : Linear grille

T : type : MO : Moved type without damper

MD : Moved type with damper

N x L : No. of slots (1 through 8) x length (inch)

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MO

MD

: �� $�. : T

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SH.LIN.T-N x L

(FIGURE 11)(FIGURE 10)

BRACKET

PLENUM

OR DUCT

SH.LIN.M

ENGINEERING PERFORMANCE DATA !�"#�� D�%,�"��G��-

�� SHAHROKHI MANUFACTURING CO.SHAHROKHI d

AK(h)

cu.ft./ft

AK(v)

cu.ft./ft

NO.

OF

SLOTS

FLOW

RATE

c.f.m./ft

VK(h)

c.f.m.

VK(v)

c.f.m.

ST.PR.(v).

DROP

in.w.g.

ST.PR.(h).

DROP

in.w.g.

N.C.

THROW

ft

MIN MAX

0.018

0.037

0.056

0.075

0.045

0.090

0.135

0.180

1

2

3

4

5

6

7

8

10

20

30

40

222

222

222

222

556

541

536

533

0.001

0.001

0.001

0.001

0.002

0.002

0.002

0.002

20

40

60

80

444

444

444

444

1111

1081

1071

1067

0.053

0.053

0.053

0.053

0.088

0.088

0.088

0.088

30

60

90

120

667

667

667

667

1667

1622

1607

1600

0.105

0.105

0.105

0.105

0.175

0.175

0.175

0.175

12

16

20

24

8

10

14

16

4

7

7

8

17

24

29

33

30

32

33

34

20

22

24

26

<20

<20

<20

<20

8

12

14

16

12

19

24

27

40

80

120

160

889

889

889

889

2222

2162

2143

2133

0.204

0.204

0.204

0.204

0.340

0.340

0.340

0.340

14

19

24

26

20

28

35

38

36

38

40

42

0.001

0.001

0.001

0.001

0.002

0.002

0.002

0.002

0.053

0.053

0.053

0.053

0.088

0.088

0.088

0.088

0.105

0.105

0.105

0.105

0.175

0.175

0.175

0.175

0.204

0.204

0.204

0.204

0.340

0.340

0.340

0.340

50

60

70

80

222

222

222

222

538

541

534

533

100

120

140

160

444

444

444

444

1075

1081

1069

1067

150

180

210

240

667

667

667

667

1613

1622

1603

1600

25

29

31

33

18

20

22

24

9

11

11

12

34

40

42

45

35

36

37

38

27

28

29

30

<20

<20

<20

<20

18

20

22

23

30

33

36

38

200

240

280

320

889

889

889

889

2151

2162

2137

2133

29

33

36

36

41

47

51

54

43

44

45

46

0.093

0.111

0.131

0.150

0.225

0.270

0.315

0.360

Is discharge velocity measured at face of diffuser in f.p.m. at vertical

discharge.Is discharge velocity measured at face of diffuser in f.p.m. at horizontal

discharge.Is area factor in square feet per feet run at vertical discharge.Is area factor in square feet per feet run at horizontal discharge.Static pressure drop in inches water gage for vertical discharge. For return

pressure drop multiply the above values by 0.3 .Static pressure drop in inches water gage for horizontal discharge.Is based on terminal velocities 100 and 50 f.p.m. for horizontal discharge.Noise criteria for the horizontal discharge. for 4 ft active length with room effect

of 10 db. For vertical discharge substract 5 db. to the above NC values.

VK(v) :

VK(h) :

AK(v) :AK(h) :

ST.PR(v) :

ST.PR(h) :THROW :

NC :

LINEAR BAR REGISTERS

& GRILLES

APPLICATION

Shahrokhi linear bar registers & grilles are

designed to suit H.V.A.C. applications for

wall, ceiling and floor mounting.Linear shape of these type of grilles make a

pleasing aesthetic in architectural appea-

rance such as Amphitheatres, Sport halls,

Swimming pools and etc.These grilles are used for supply, return and

exhaust air.

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SH.LIN.F

(FIGURE 12)

�� SHAHROKHI MANUFACTURING CO.SHAHROKHI �l

BLADES

Five types of blades are used (figures 13-

20). Types of 00 & 01 models (figures 13 &

14) in one way and types of 02 & 15 & 30

models (figures 15-20) in one and two ways

are constructable.

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VARIABLE

90

90

90

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DESCRIPTION

These grilles constructed in maximum up to

5m. length and either can be connected

them in corners with any request angles by

using prepared pecies (figure 12).Adjustable blades with aerofoil section

which construct in multi parallel, allow a

smooth and uniform pressure drop air flow

patterns.

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(FIGURE 15)

(FIGURE 14)


LISTED SIZE - 12.5

12.5

12.5

33.0

33.0

46.5

46.5

(FIGURE 16)


LISTED SIZE - 12.5

12.5 33.0

46.5

(FIGURE 13)



LISTED SIZE - 12.5

LISTED SIZE - 12.5

12.5 33.0

46.5

�� SHAHROKHI MANUFACTURING CO.SHAHROKHI �L

(FIGURE 20)

12.5 33.0

46.5

(FIGURE 19)



LISTED SIZE - 12.5

LISTED SIZE - 12.5

12.5 33.0

46.5

30

(FIGURE 18)


LISTED SIZE - 12.5

12.5 33.0

46.5

15

30

(FIGURE 17)


LISTED SIZE - 12.5

12.5 33.0

46.5

15

�� SHAHROKHI MANUFACTURING CO.SHAHROKHI�F

MATERIAL & FINISH


aluminium profile for frames and different

thicknesses for blades in matt aluminium

anodized finish.White polyester liquid or powder coating


color with raul code up on requirement.

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(FIGURE 21)

ORDERING CODE

Shahrokhi linear bar registers & grilles with


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LIN : Linear bar register & grille

T : type : F00 : F01 : F02 :

F15 : F30 :

0 deg fixed type T bar fixed type Semi T bar fixed type

15 deg fixed type 30 deg fixed type

W x L x K : Width (inch) x length (inch) x blade deflection (1 or 2)

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�� : LIN

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(��n��-��, (��n��-��/�O.�6

: F02 : F01 : F00

: F30 : F15

: �� $�. : T

p�M��m�� G�1��m�� /�6�(&-��L��x x : W x L x K

SH.LIN.T- WxLx K

(A) (B) (C) (D)

33.0 mm.

46.5

mm

.

46.5

mm

.

45.0

mm

.

47.0

mm

.

27.0 mm. 43.0 mm. 32.0 mm.

FRAMES

Four types of frames are available up on

request (figure 21). Select the type of frame

is relative to installation of grilles locations.

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SH.LIN.F00 SH.LIN.F01&F02

ENGINEERING PERFORMANCE DATA (��n�� D�%,�"��G��-

�� SHAHROKHI MANUFACTURING CO.SHAHROKHI �X

12.5

40 130

155

200

60

70

90

400 419

388

417

400

368

391

0.009 0.010

0.008

0.010

0.009

0.007

0.009

60 180

225

280

85

105

130

600 581

563

583

567

553

565

0.021 0.020

0.018

0.020

0.019

0.018

0.019

80 230

295

360

110

140

170

800 742

738

750

733

737

739

0.036 0.031

0.031

0.032

0.031

0.031

0.031

<20 20

20

21

<20

<20

<20

<20 <20

<20

<20

<20

<20

<20

<20 <20

<20

<20

<20

<20

<20

16 26

28

30

19

23

25

26 41

43

46

29

36

38

20 32

34

39

21

27

30

14 27

28

31

16

19

21

8 16

18

20

10

11

14

13 21

22

26

13

17

19

100 280

365

440

135

175

210

1000 903

913

917

900

921

913

0.056 0.046

0.047

0.048

0.046

0.048

0.047

25 24

26

26

23

23

23

20 31

33

35

22

28

29

33 47

51

55

36

44

46

120 330

435

520

160

210

250

1200 1065

1088

1083

1067

1105

1087

0.080 0.064

0.067

0.066

0.064

0.069

0.066

28 29

30

30

27

28

28

24 36

40

42

26

34

35

39 57

64

66

41

51

56

140 380

505

600

185

245

290

1400 1226

1263

1250

1233

1289

1261

0.110 0.084

0.089

0.088

0.085

0.093

0.089

31 32

33

34

30

31

32

27 42

44

47

31

38

41

42 66

70

74

48

58

64

160 430

575

680

210

280

330

1600 1387

1438

1417

1400

1474

1435

0.146 0.108

0.117

0.113

0.110

0.123

0.116

34 35

37

38

33

35

36

30 46

49

51

33

41

44

45 69

75

78

50

62

67

180 480

645

760

235

315

370

1800 1548

1613

1583

1567

1658

1609

0.182 0.137

0.148

0.143

0.140

0.156

0.148

37 38

40

41

36

38

38

33 49

51

55

36

44

46

48 72

76

80

53

65

69

8"

[0.310]

10"

[0.400]

12"

[0.480]

3"

[0.100]

4"

[0.150]

5"

[0.190]

6"

[0.230]

width

AK

(sq.ft/ft)

width

AK

(sq.ft/ft)

FLOW

RATE

c.f.m./ft

FLOW

RATE

c.f.m./ft

VEL.

f.p.m.

VEL.

f.p.m.

N.C. N.C.

THROW

ft

THROW

ft

MIN MINMAX MAX

P

in.w.g.

TP

in.w.g.

T width

AK

(sq.ft/ft)

width

AK

(sq.ft/ft)

FLOW

RATE

c.f.m./ft

FLOW

RATE

c.f.m./ft

VEL.

f.p.m.

VEL.

f.p.m.

N.C. N.C.

THROW

ft

THROW

ft

MIN MINMAX MAX

P

in.w.g.

TP

in.w.g.

T

35

55

60

80

120

150

180

361

379

323

356

400

377

377

0.007

0.008

0.004

0.006

0.010

0.008

0.009

50

75

90

115

170

215

260

515

517

484

511

567

540

544

0.019

0.019

0.017

0.019

0.023

0.021

0.021

65

95

120

150

220

280

340

670

655

645

667

733

704

711

0.030

0.029

0.026

0.030

0.036

0.032

0.033

<20

20

<20

21

22

23

24

<20

<20

<20

<20

<20

20

20

<20

<20

<20

<20

<20

<20

<20

11

14

18

20

23

23

25

18

24

30

33

35

36

36

15

20

22

25

27

27

28

11

14

15

16

19

22

24

6

8

8

10

13

15

17

9

11

12

14

17

17

19

80

115

150

185

270

345

420

825

793

806

822

900

867

879

0.047

0.043

0.045

0.046

0.054

0.051

0.052

22

22

22

24

25

27

28

14

18

22

25

25

27

29

25

29

36

41

42

41

43

95

135

180

220

320

410

500

979

931

968

978

1067

1030

1046

0.062

0.057

0.061

0.062

0.072

0.068

0.070

25

25

27

27

29

31

32

18

21

27

28

29

31

33

29

33

42

45

47

46

48

110

155

210

255

370

475

580

1134

1069

1129

1133

1233

1193

1213

0.080

0.072

0.079

0.080

0.093

0.087

0.090

28

28

31

31

33

35

35

21

24

31

30

33

34

36

32

40

46

48

50

51

51

125

175

240

290

420

540

660

1289

1207

1290

1289

1400

1357

1381

0.102

0.089

0.102

0.102

0.120

0.113

0.117

32

31

34

35

36

38

39

23

26

35

34

35

38

40

35

42

50

53

53

55

56

140

195

270

325

470

605

740

1443

1345

1452

1444

1567

1520

1548

0.128

0.111

0.130

0.128

0.151

0.142

0.147

35

34

37

37

39

41

42

26

29

38

37

38

40

43

39

45

54

56

57

59

62

3"

[0.097]

4"

[0.145]

5"

[0.186]

6"

[0.225]

8"

[0.300]

10"

[0.398]

12"

[0.478]

12.5

Is discharge velocity measured at face of grille in f.p.m.Noise criteria for the supply grille without damper with room effect of 8db. and

8ft. active length:-Add 2db. to the above NC values in case of grille with damper.-Add 4db. to the above NC values for return grilles.- For other active length see NC correction factors table.

Is for 8ft active length supply grille without damper for 100 and 50 f.p.m.

terminal velocities. For other active lengths see throw correction factors table.Is area factor in square feet per feet run.Is in inches water gage for supply grille without damper.For grille with damper multiply the above values by 1.4.For return grille multiply the above values by 0.85.

T

VELOCITY :NC :

THROW :

AK :P :

ENGINEERING PERFORMANCE DATA (��n�� D�%,�"��G��-

�� SHAHROKHI MANUFACTURING CO.SHAHROKHI�]

12.515

NC - Correction factors

THROW - Correction factors

1

-8

2Active length (ft)

Correction (db) -5

4

-3

6

-1

8

0

10

+2

12

+3

1

0.6

2Active length (ft)

Multiply by 0.7

4

0.8

6

0.9

8

1.0

10

1.2

12

1.4

12.5

30

width

AK

(sq.ft/ft)

width

AK

(sq.ft/ft)

FLOW

RATE

c.f.m./ft

FLOW

RATE

c.f.m./ft

VEL.

f.p.m.

VEL.

f.p.m.

N.C. N.C.

THROW

ft

THROW

ft

MIN MINMAX MAX

P

in.w.g.

TP

in.w.g.

T

40

55

75

80

130

160

190

421

393

417

364

433

410

404

0.010

0.009

0.010

0.007

0.011

0.010

0.009

55

80

105

120

180

225

270

579

571

583

545

600

577

574

0.020

0.019

0.020

0.017

0.021

0.019

0.019

70

105

135

160

230

290

350

737

750

750

727

767

744

745

0.031

0.032

0.032

0.030

0.033

0.032

0.032

<20

20

20

20

21

22

24

<20

<20

<20

<20

<20

<20

20

<20

<20

<20

<20

<20

<20

<20

14

17

22

24

26

27

30

22

27

35

37

39

41

43

18

20

25

26

31

33

35

13

15

19

19

23

26

28

8

9

11

12

16

17

19

12

12

16

16

20

21

23

85

130

165

200

280

355

430

895

929

917

909

933

910

915

0.046

0.049

0.048

0.047

0.049

0.047

0.048

22

24

23

24

26

26

27

17

21

26

29

29

31

35

28

35

40

45

47

47

54

100

155

195

240

330

420

510

1053

1107

1083

1091

1100

1077

1085

0.062

0.069

0.066

0.067

0.068

0.065

0.066

26

27

27

29

30

31

32

20

24

32

33

35

36

39

32

41

49

54

57

57

59

115

180

225

280

380

485

590

1211

1286

1250

1273

1267

1244

1255

0.082

0.093

0.088

0.091

0.090

0.087

0.088

28

31

31

33

33

34

36

23

29

36

38

39

41

44

36

46

54

59

62

64

65

130

205

255

320

430

550

670

1368

1464

1417

1455

1433

1410

1426

0.105

0.122

0.113

0.120

0.116

0.112

0.115

30

33

34

36

36

37

39

25

32

38

41

42

44

47

39

49

57

62

64

66

70

145

230

285

360

480

615

750

1526

1643

1583

1636

1600

1577

1596

0.133

0.154

0.143

0.152

0.146

0.142

0.145

34

38

38

40

40

40

42

28

36

41

43

45

47

50

42

52

61

65

67

69

75

3"

[0.095]

4"

[0.140]

5"

[0.180]

6"

[0.220]

8"

[0.300]

10"

[0.390]

12"

[0.470]

width

AK

(sq.ft/ft)

width

AK

(sq.ft/ft)

FLOW

RATE

c.f.m./ft

FLOW

RATE

c.f.m./ft

VEL.

f.p.m.

VEL.

f.p.m.

N.C. N.C.

THROW

ft

THROW

ft

MIN MINMAX MAX

P

in.w.g.

TP

in.w.g.

T

125

150

180

431

395

391

0.011

0.009

0.009

175

215

260

603

566

565

0.021

0.019

0.019

225

280

340

776

737

739

0.034

0.031

0.031

22

23

25

<20

20

20

<20

<20

<20

25

26

28

37

38

40

28

29

31

21

24

25

14

16

18

18

19

21

275

345

420

948

908

913

0.051

0.047

0.047

26

28

29

28

30

32

44

44

47

325

410

500

1121

1079

1087

0.071

0.065

0.066

30

32

34

33

34

36

51

51

53

375

475

580

1293

1250

1261

0.094

0.088

0.089

34

36

37

36

37

39

54

55

57

425

540

660

1466

1421

1435

0.122

0.114

0.116

37

38

40

39

40

43

58

59

62

475

605

740

1638

1592

1609

0.153

0.145

0.148

40

42

43

41

43

46

60

62

67

8"

[0.290]

10"

[0.380]

12"

[0.460]

35

55

65

85

389

423

382

405

0.008

0.010

0.008

0.009

50

75

95

120

556

577

559

571

0.018

0.019

0.018

0.019

65

95

125

155

722

731

735

738

0.030

0.030

0.031

0.031

<20

<20

<20

21

<20

<20

<20

<20

<20

<20

<20

<20

12

15

22

23

19

24

33

36

16

20

25

28

12

14

17

19

7

8

9

12

10

11

15

17

80

115

155

190

889

885

912

905

0.045

0.045

0.047

0.047

22

22

22

25

16

19

26

27

25

29

41

43

95

135

185

225

1056

1038

1088

1071

0.063

0.061

0.067

0.065

25

26

28

29

19

22

31

31

30

36

47

48

110

155

215

260

1222

1192

1265

1238

0.083

0.079

0.090

0.086

28

29

31

33

22

26

35

35

33

42

52

53

125

175

245

295

1389

1346

1441

1405

0.108

0.102

0.117

0.111

32

32

35

35

25

28

38

38

37

45

55

57

140

195

275

330

1556

1500

1618

1571

0.138

0.128

0.149

0.141

36

34

39

39

27

31

40

40

40

48

58

59

3"

[0.090]

4"

[0.130]

5"

[0.170]

6"

[0.210]

SH.LIN.F15 SH.LIN.F30

LINEAR BAR GRILLE DAMPERS

APPLICATION

Shahrokhi linear bar grille dampers are used

to adjust the air flow rate or close the grilles if

neccessery.The blades of these grille dampers are

constructed in two types of parallel or oppo-

site.The levers, which used for adjusting the

parallel blades are constructable in three

types of receprocating, switch and key.It is possible to contact these levers to an

electrical key or a remote control system

where high side wall or exposed ducts are

not available such as Amphitheatres,Cine-

ma, etc.Either can adjust the space optional

temperature by an electrical thermostat

which illustrates in control line.

(��n��

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�� SHAHROKHI MANUFACTURING CO.SHAHROKHI �a

DESCRIPTION

In opposite type (figure 22) removal is by

spin a special screw.

In receprocating type (figure 23) the lever is

located in the middle of the damper which

removal is at horizontal way.

D�"5E�'J��V,� '�(��0�G� 3#.��LL��d� �b�$� .��

��5A��D��*�U�4R��m56

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�� SHAHROKHI MANUFACTURING CO.SHAHROKHI�b

(FIGURE 22)


(FIGURE 23)


LEVER MOVE PATH

LISTED SIZE - 12.5

48.0

10.5

LISTED SIZE - 12.5

SPECIAL SCREW

ANGLE48.0

In switch type (figure 24) the lever is located

in the corner of the damper which removal is

at spin way.

In key type (figure 25) the lever is located

over the grille frame which removal is at

vertical way.

�#@�A�� B�� [��c� ��LX�� 5k�,�$� .��

��.��>�(��0�G�3#.��$�.��

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�� SHAHROKHI MANUFACTURING CO.SHAHROKHI �d

(FIGURE 24)


(FIGURE 25)


LEVER ROTATION PATH

LEVER MOVE PATH

LISTED SIZE - 12.5

LISTED SIZE - 12.5

48.0

10.5

15

�� SHAHROKHI MANUFACTURING CO.SHAHROKHI�f

ORDERING CODE

Shahrokhi linear bar grille dampers with


Y��;,��

� �K��Y�� ;,�� (��n��

��.��jRI�


GDL : Linear bar grille damper

T : type : RR : Handling control receprocating type

RH : Remote control receprocating type

SW : Switch type

KE : Key type

OP : Opposite type

W x L : Width (inch) x length (inch)

�� .�� : SH

(��n�� : GDL

�#,��G�#��I��/��K��G�#��I�

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d� �b

: RH

: RR

: SW

: KE

: OP

: � �� $�. : T

p�M��m�� G�1��m��x : W x L

SH.GDL.T-W x L

MATERIAL & FINISH


aluminium profile in matt aluminium

anodized finish for key and opposite types.High quality 0.7mm. thickness aluminium

sheet finish for receprocating and switch

types.Either is possible to use 0.7mm. thickness

iron galvanized sheet for receprocating,

switch and opposite types.White polyester liquid or powder coating


color with raul code up on request.

g.��

�� II��c� 5�5�� 9>�� 5@�� 6�K��d�s�b�� 5?��$� .

c�5�5�� 9>�/��O�� .>�\�� #75?5��hL]�(�� RE

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�� SHAHROKHI MANUFACTURING CO.SHAHROKHI Ll

GRILLES FIXING DETAILS

A) The (figure 26) shows grille fixing method

over the plenum box.

B) The (figure 27) shows grille fixing method

over the duct, ceiling or wall.

C) The (figure 28) shows another fixing

method with a use of special spring.

� ��+4.�D�5kO-

c��?6��%)-��+4.��3��1 �La��29�

�� I.

23,�<G�.��+4.��3��1 �Lb��Z

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(FIGURE 28)

(FIGURE 26)

(FIGURE 27)

BRACKETPLENUM

OR DUCT

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��#,��75��&B�'�

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�.�7#�,��'�@�

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��.��#@�

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� �'='

v�#.��89�,

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Y��`6��&�9�,

� /K��7M�� .�R��#�

(T6��'�@��&�.��

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Residences (suburbia)

Residences (urban)

Music Auditoriums

Radio and Tv Broadcasting

Theatres

Assembly Hall

Mosques, churches

Libraries and Schools

Laboratories

Recreation Halls

Public Libraries, Museums

Banks, Post Offices

Restaurants Night Clubs

Cafeterias

Dept. Stores (upper floors)

Clothing Stores

Dept. Stores (main floors)

Supermarket, Retail stores

Sports Coliseums

Bowling Alley

Swimming pools

Factories, Supt. offices

Light Manufacturing

Heavy Manufacturing

Offices Conference Rooms

Offices Executive

Office Private

Office General

Office Computer

Hospital Rooms

Hospital Operating Rooms, Wards

Hospital Public Spaces

Apartment, Buildings, Hotel Rooms

Hotels, Ballrooms, Bank Halls

Hotel Public Spaces

Kitchens, Laundries, Garages

Recommended Noise Criteria

�� V,�#�

��*��O5�APPLICATIONAVERAGE(NC)

(NC)

�� SHAHROKHI MANUFACTURING CO.SHAHROKHIL�

L]

Fl

Fl

F]

Xl

Fl

F]

F]

Xl

]l

LL

LL

Lb

FL

L]

F]

Xl

Xl

F]

Xl

Xl

X]

Xl

Xl

X]

X]

F]

Xl

]l

X]

al

a]

F]

F]

Xl

X]

25

30

22

22

27

32

25

35

40

40

35

40

40

45

40

40

45

45

35

40

50

45

60

65

30

35

35

40

50

30

35

40

35

35

40

45

�� -��&�I56�(M�,Recommended delivery Velocities

��&�I56�(M�,

�� -��

(m/s)

APPLICATION

Recommendeddelivery

Velocities(m/s)

Quantity Imperial Unit Metric UnitForm Imperial

To MetricMultiply By:

Form MetricTo ImperialMultiply By:

� 0�� %'�G�� -Conversion Table

�h]� �Lh]

Lh]� �Fh]

Lh]� �Xh]

Fh]� �]h]

Xh]� �a

]� ��l

1.5 - 2.5

2.5 - 3.5

2.5 - 4.5

3.5 - 5.5

4.5 - 6

5 - 10

\R6�� #,�

V%E��*�� #,�

J�K�� 89�,�<D�T�� 89�,

q��&,x�� .�R��#�

�� 89�,��<�# �� &B�'��<�.��T�� .��<�&.�7'��6>

�-�T��&.�#,��75��<�*�4��'�@��<�'='

��`C��&�9�,�<�&?# �<�&.��#,��<w�O��'�@�

��7M��&�9�,��

� �.�/�&B�<�'�5��&B�'��<� ��

�& �P��@��

� v��A�<�& �A��<�,�#��D�e.��

Y��@��'�@��

Broadcasting studios, Sound and

recording studios.

Concert halls, Auditoriums, Library,

Classrooms

Large offices, Restaurants, Hotels

Dining rooms, Public buildings

Corridors, Computer-rooms, Cafeterias

Department stores

Average factories, Workshops, Garages

Warehouses

Apartments, Residences, Hotel rooms

Theatres, Private offices, Hospitals, Mosques

square foot

square inch

square metre

square milimetre

0.0929

645.16

10.764

0.00155

(m )

(mm )

2

2

3

3

Area

Density

Length

Pressure

Temperature

Velocity

Volume

(flow)

inch

foot

foot

yard

milimetre

milimetre

metre

metre

25.4

304.8

0.3048

0.9144

0.0394

0.00328

3.2808

1.0938

(mm)

(mm)

(m)

(m)

inch of water column

foot of water column

inch of mercury column

ounces per square inch

pounds per square inch

Kilopascal

Kilopascal

Kilopascal

Kilopascal

Kilopascal

0.2486

2.9837

3.3741

0.4309

6.8948

4.0219

0.3252

0.2964

2.3206

0.145

(kPa)

(kPa)

(kPa)

(kPa)

(kPa)

fahrenheit celcius 5/9 ( F-32) (9/5 C)+32( C)

feet per second

feet per minute

miles per hour

metres per second

metres per second

metres per second

0.3048

0.00508

0.44704

3.2808

196.85

2.2369

(m/s)

(m/s)

(m/s)

cubic feet per minute

cubic feet per minute

cubic feet per hour

galons per minute

galons per minute

liters per second

cubic metres per second

milliliters per second

liters per second

liters per second

0.4719

0.0004719

7.8658

0.6309

0.7577

2.119

2119.0

0.127133

15.850

13.198

(L/s)

(m /s)

(ml/s)

(L/s)

(L/s)

(cfm)

(cfm)

(cfh)

(U.S.)

(imperial)

(fps)

(fpm)

(mph)

pounds per cubic foot kilograms per cubic metre 16.018 0.0624(kg/m )

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The area of grille utilized by the air stream at

the point of the outlet velocity, V (See

outlet velocity) as measured with an

appropriate meter.CFM=A x V

The point of measurement and type of

meter must be defined to accurately

determine CFM.

k

k

k k

Outlet Area (A ):

TERMINOLOGY

Aspect Ratio:

The ratio of width to height of the grille core.

Drop:

The vertical distance in feet between the

lower edge of a grille and the lower edge of

the air stream at the end of its throw.Drop is

affected by the lenght of throw, the velocity

and the temperature differential between the

supply and room air.

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The compressive pressure in inches of H O

that exists in the grille collar area at a given

air volume with or without specific

designated accessories.

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sStatic Pressure (P ):

The pressure in inches of H O equated to a

velocity that exists for a given air volume in

the grille collar area.

V

2

Velocity Pressure (P ):

�� SHAHROKHI MANUFACTURING CO.SHAHROKHI LX

A grille sound rating in pressure level at a

given condition of operation , based on

established criteria and a specific room

acoustic absorption value. Catalog NC

ratings are based on sound power level (LW)

minus an 18db room attenuation all octave

bands.

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The velocity in f.p.m. of the air stream at the

end of the throw (T) from the grille or a

designated point.

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T

The maximum total width in feet of the air

pattern at the point of terminal velocity.

Air Spread :

The distance in feet from a grille or

designated location to a point where the

motion of the air stream is reduced to a

given terminal velocity (V )T

Throw (T) :

The measured velocity at a stated point with

a specified meter. The rated outlet velocity is

typically an average of several prescribed

velocity measurements.CFM =A x V (see outletArea)

K

k k

Outlet Velocity (V ):

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T

SVThe sum of the static pressure (P ) and the

velocity pressure (P ) that exists in the grille

collar for a given air volume.

T

S

V

Total Pressure (P ):

AHMAD SHAHROKHI was born in 1932 and began working in Sholeh Khavar Company in 1950. At that time, Iranian Industry was very young and most of the industrial parts and equipment were imported from foreign countries and Sholeh Khavar Company, active in the field of installation industry, was of no exception to this rule, thus it imported the air adjustable grilles required for its projects from USA supplied by T&B American Company.In 1951, a cargo ordered by Sholeh Khavar was sent by T&B Company for the said Company transported by vessel. this vessel broke down in a fire accident while in its way and therefore caused the Company to encunter problems in meeting its obligations. Thereupon, Ahmad Shahrokhi , assisted by financial support of the Company`s authorities, began sampling and manufacturing grilles from foreign models and was able to put into operation the production line of air adjustable grilles within a period of six months.Since then, being half a century, this Company has improved its quality and quantity day by and is proud to announce that on its 50 anniversary of its establishment, has proceeded in publishing the most comprehensive technical catalogue of its various products together with a CD of the computations.

linear slot diffusers and bar grilles

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