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Bµn°–§ ° BµoP«j DAMPERS & LOUVERS

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Dampers and Louvers Of Shahrokhi MFG Co

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Page 1: Dampers and Louvers

Bµn°±§ ° BµoP«j

DAMPERS & LOUVERS

Page 2: Dampers and Louvers

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Page 3: Dampers and Louvers

DUCTED DAMPERS

APPLICATION

Shahrokhi ducted dampers are used for

adjust the air flow rate or close the duct path

if necessary.These dampers apply in round or square

ducts.

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'(� ����� ���/�) �#0�����)����.��������������1��

������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHI2

DESCRIPTION

Shahrokhi ducted dampers open , close or

adjust by rotate a number of blades with a

common linkage mechanism in square type

and by rotate a lever with a handle or an

electrical motor in round type (Figures 1&2).

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����)����������������8�9,:���(����;����;�����<��=����

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'@A�8�2�����<�B�(��)������������8��,C��D$��

(FIGURE 1)

ALL DIMENSION IN mm.

150.0 150.0

SH.DDA.

Page 4: Dampers and Louvers

The baldes of square ducted dampers are

constructed in two types of parallel and

opposite (Figures 3&4).To easily open or close the blades a brass

bush with a grease reservoir located in join

the frame.Either is possible to use aluminium

washable air filter with different thicknesses

behind the ducted dampers as optional.

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(FIGURE 4) (FIGURE 3)

ALL DIMENSION IN mm.ALL DIMENSION IN mm.

(FIGURE 2)

ALL DIMENSION IN mm.

BRASS BUSH 70D+80

40

D

150.0 150.0

VARIABLE

150.0 150.0

������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHI A

Page 5: Dampers and Louvers

ORDERING CODE

Shahrokhi ducted dampers are specified

with following ordering code.

/ �+-�(�

'(������XW:���$�/ �+-�(�����������������������

SH : Shahrokhi manufacture

DDA : Ducted damper

T : type : SQO : Opposite square type

SQP : Parallel square type

ROU : Round type

W x H or : Width (inch) x Height (inch) or diameter (inch)

�������,6�&����� �� : SH

��������� : DDA

E���F�/�) �#0�$����/�) �#0

�)

: SQO

: SQP

: ROU

:.��������G�� : T

YZ�@[���B G�+� �@[���B���� !�@[���Bx : W x H or

SH.DDA.T-W x H or

MATERIAL

High quality 1.5mm. thickness iron

galvanized or aluminium sheet for frames

and blades.Either can be used 1.5mm. thickness

extruded aluminium profile in matt

aluminium anodized finish for square ducted

dampers.

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Page 6: Dampers and Louvers

FIRE DAMPERS

APPLICATION

Shahrokhi fire dampers are used inline the

ducts for prevent fire and smoke passing

from the fire zone to another zone.These dampers fixed along the wall or

partition at vertical position and along the

ceiling at horizontal position.

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SH.FDA.CO1SH.FDA.PAG

DESCRIPTION

Shahrokhi fire dampers contructed in three

types of corrugate , parallel and opposite.These dampers have an access door to

control and change the fuse (Figure 5) and

either equipped with a command system to

close the air duct path as following:

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c(��������$�d:������.������C������N���8(C��"#�

(FIGURE 5)

ROUND

DUCT

RECTANGULAR

DUCT

RECTANGULAR

DUCTROUND

DUCT

FIRE DAMPER FIRE DAMPER

ADAPTOR

ACCESS DOORACCESS DOOR

ADAPTOR

������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHI H

Page 7: Dampers and Louvers

A) The command system with a thermal

element at 71 c set point usable in each

three types of dampers.

B) The command system with a thermal fuse

at 68 c & 79 c set points usable in each three

types of dampers.

C) The command system with a smoke or

thermal detectors usable in parallel and

opposite types of dampers.

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������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHI^

Page 8: Dampers and Louvers

CORRUGATE FIRE DAMPERS

The corrugate fire dampers have a number

of interlocking blades which these blades

fixed the damper at open position by use a

support.In fire time at vertical fixing position the

damper closed because of blades weight

and at horizontal fixing position closed by a

special spring (figure 6).

Either in these type of dampers is possible to

fix the blades out side the air path inside a

casing to decrease air pressure drop

(figure 7).

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"��`� ��� ����*(� �(#>��=��?-�����*5�1������(������

'� ������>��"��i�$��

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'@e��<�B�(��(����

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'@F��<�B����� �!����� �UZ

(FIGURE 7)

(FIGURE 6)

ALL DIMENSION IN mm.

ALL DIMENSION IN mm.

150.0

BLADE LOCK

150.0

90.0

150.0 150.0

90.0 90.0

SPRING

������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHI e

Page 9: Dampers and Louvers

PARALLEL & OPPOSITE FIRE DAMPERS

The parallel and opposite fire dampers have

multy blades with a common linkage

mechanism which these blades fixed

damper at open position by use a support.In fire time , the damper closed because of

the weight attached the blades at vertical

fixing position (Figure 8).

Either is possible to connected the linkage

mechanism to an electrical motor at

horizontal and vertical fixing positions

(Figure 9).

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����$8�� -�������D����NZ�KJ��"��`� ��_�`�;�>��� �

'@E��<�B�(��(������,C��(�������J,����*5������

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�J,���<�,<��� �����=������ ��(��;���;����<������ ��

'@g��<�B���N�

(FIGURE 8)

(FIGURE 9)

ALL DIMENSION IN mm.

ALL DIMENSION IN mm.

150.0 150.0 150.0

WEIGHT

200.0

FUSIBLE

LINK

������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHIF

Page 10: Dampers and Louvers

ORDERING CODE

Shahrokhi fire dampers are specified with

following ordering code.

/ �+-�(�

XW:����$�/ ��+-�(�������������_�`�(4�������

'(�����

SH : Shahrokhi manufacture

FDA : Fire damper

T : type : CO1 :

CO2 :

PAG :

PAM :

OPG :

OPM :

Corrugate type without casing

Corrugate type with casing

Parallel weight type

Parallel motorized type

Opposite weight type

Opposite motorized type

W x H : Width (inch) x Height (inch)

�������,6�&����� �� : SH

_�`�(4��� : FDA

��+3���8(����*���G����+3�������*���G��

��$8��$����G��� ������$����G��

��$8�E���F�G��� �����E���F�G��

: CO1

: CO2

: PAG

: PAM

: OPG

: OPM

: ���G�� : T

YZ�@[���B G�+� �@[���Bx : W x H

SH.FDA.T- W x H

MATERIAL

High quality 2mm. thickness iron galvanized

or stainless steel sheet for frames and

blades.

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,N�R���A�"��W4������,-�����*�������)�\ 8�$����*5�8��#��!

'(��������#��K-�����"�+�����

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Page 11: Dampers and Louvers

AIR TRANSFER LOUVERS

APPLICATION

Shahrokhi fresh air louvers are used for

provide necessary fresh air in spaces such

as airhandling uint rooms, air condensers

and cooling towers locations, mechanical

rooms and etc.These louvers have a low resistance in

exhaust or intake air flow because of high

free area and the blades designed to prevent

rain penetration inside.

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KJ���3��D�$��-�������#!������������#��<�� ��$������ ��

����#!����D�*(���=������h���8������������ ��C��(��

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'(��������)�R������������ ���PQ�M�+��$�����(��*(���`�n

SH.LOU.FAV

DESCRIPTION

Shahrokhi fresh air louvers are constructed

in two types for fixing over the ducts

(figure 9) and specially for buildings view

(figure 10).

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'(�������,��-

SH.LOU.FAD

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Page 12: Dampers and Louvers

MATERIAL & FINISH

It is possible to use one or two rows sound

baffles to attenuate the obtrusive sounds

(figure 11).

High quality 1.5mm. thickness extruded

aluminium profile for building view type and

aluminium sheet for ducted type in matt

aluminium anodized finish for blades and

frame.Either can be use 1.5mm. thickness iron

galvanized sheet for ducted type.

Either is possible to supplied these louvers

with galvanized 10mm.x 10mm. mesh bird

screen , aluminium washable air filter and

ducted damper as optional.

p� �8�����

��)�R�� ���������������G��� ������ ������8�"�R��!�1��

���&����-�V�� �8�����=��$��D��`��������(&� �UZ�$�

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���S85�$�����N,��-����N��j�JW��G��� �����*5�8�P��!

���;���������Q�\ 8�$�����������G���� ��8���::��;��������Q

"�+������;�������Q�*(��������Q�7�8 ���� ,N�R���2]^�"��W4

'(��������#��K-���

"��W4����*��������)�\ 8�$����������G��� ���������1��TN�

'��N��*��+,-��,N�R���2]^

10mm.x 10mm. �)*(�5�� ���KJ����<���1��TN�

1������.��������8��:,C�����!����������Q�,R�S�D�*�������)

'� ������8�$����% �&� �����T� �

(FIGURE 9) (FIGURE 10) (FIGURE 11)

ALL DIMENSION IN mm. ALL DIMENSION IN mm. ALL DIMENSION IN mm.

4543.0

44.0

46.5

BIRD SCREEN

BIRD SCREEN

100.0 200.0

100.0

75.0

75.0

100.0

45

BIRD SCREEN

100.0

75.0

100.0

������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHI 2o

Page 13: Dampers and Louvers

ORDERING CODE

Shahrokhi fresh air louvers are specified

with following ordering code.

/ �+-�(�

XW:���$�/ ��+-�(������������*$��������������T� �

'(�����

SH : Shahrokhi manufacture

LOU : Louver

T : type : FAV :

FAD :

FAS :

Fresh air louver for building view

Fresh air louver for ducted

Fresh air louver for ducted with sound attenuator

W x H : Width (inch) x Height (inch)

�������,6�&����� �� : SH

8�� : LOU

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�)�(&�*�N#���������*$���������T� �

: FAV

: FAD

: FAS

: �T� ��G�� : T

YZ�@[���B G�+� �@[���Bx : W x H

SH.LOU.T-W x H

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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,-��R5�$��*��+,-�����@=���,-�8,<��B�� ��5���������p�

$���������������XW:��.� �* �N������>���p� ������(�+-

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Page 14: Dampers and Louvers

0.266

1.71

2.63

3.55

4.47

5.39

6.30

7.22

8.14

9.06

9.97

10.89

11.81

12.73

13.65

14.56

15.48

1.42

2.29

2.94

3.71

4.45

5.23

5.99

6.75

7.52

8.28

9.04

9.80

10.56

11.32

12.09

12.85

1.28

1.96

2.64

3.33

4.01

4.69

5.38

6.06

6.74

7.43

8.11

8.80

9.48

10.16

10.58

11.53

1.13

1.74

2.34

2.95

3.55

4.16

4.76

5.37

5.97

6.58

7.18

7.79

8.40

9.32

9.61

10.21

0.98

1.51

2.04

2.57

3.09

3.62

4.15

4.67

5.20

5.73

6.26

6.78

7.31

7.84

8.37

8.89

0.78

1.29

1.74

2.19

2.63

3.08

3.53

3.98

4.43

4.88

5.33

5.78

6.23

6.68

7.13

7.58

0.69

1.06

1.43

1.81

2.18

2.35

2.92

3.29

3.66

4.03

4.40

4.77

5.14

5.52

5.89

6.26

0.55

0.84

1.13

1.43

1.72

2.01

2.30

2.59

2.89

3.18

3.48

3.77

4.06

4.36

4.65

4.98

0.45

0.69

0.93

1.17

1.41

1.65

1.89

2.14

2.38

2.62

2.86

3.09

3.34

3.58

3.82

4.06

0.40

0.62

0.83

1.05

1.26

1.47

1.69

1.90

2.12

2.33

2.55

2.76

2.97

3.19

3.41

3.62

0.35

0.54

0.73

0.91

1.11

1.30

1.48

1.67

1.86

2.05

2.24

2.43

2.62

2.81

2.99

3.18

0.30

0.46

0.62

0.79

0.96

1.12

1.28

1.44

1.60

1.77

1.93

2.11

2.27

2.43

2.59

2.76

0.23

0.39

0.50

0.65

0.79

0.93

1.07

1.21

1.35

1.48

1.64

1.77

1.90

2.04

2.19

2.31

0.336

1600

0.195

0.250

1400

0.140

0.180

1200

0.098

0.126

1000

0.078

0.100

900

0.062

0.080

800

0.048

0.061

700

0.035

0.045

600

0.024

0.031

500

0.016

0.020

400

0.009

0.011

300

0.004

0.005

200Face Velocity

(FPM)

IntakePD" W.G.

W (INCH)H(INCH)

12

12

16

20

24

28

32

36

40

44

48

52

56

60

64

68

72

14 16 18 20 24 30 36 42 48 54 60 72

ExhaustPD" W.G.

SH.LOU.FAV

EFFECTIVE FREE AREA (AK)

��N,��-���N��j�JW��*$������������T� ��%�U-�3��.8(�ENGINEERING PERFORMANCE DATA

PD :

AK :

W :

H :

CFM :

V :

Total pressure drop in inch water gage.

Effective free area in square feet=CFM/VK

Width of louver in inch

Height of louver in inch

Air quantity

Face velocity in FPM

kV

k

������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHI 2A

Page 15: Dampers and Louvers

SH.LOU.FAD

�������*$������������T� ��%�U-�3��.8(�ENGINEERING PERFORMANCE DATA

PD :

AK :

W :

H :

CFM :

V :

Total pressure drop in inch water gage.

Effective free area in square feet=CFM/VK

Width of louver in inch

Height of louver in inch

Air quantity

Face velocity in FPM

0.11 0.14 0.17 0.20 0.23 0.29 0.38 0.46 0.55 0.64 0.820.73 1.00

0.22 0.28 0.34 0.40 0.46 0.58 0.76 0.93 1.11 1.29 1.641.47 2.00

0.34 0.43 0.52 0.61 0.69 0.87 1.14 1.40 1.67 1.94 2.472.20 3.00

0.45 0.57 0.69 0.81 0.93 1.16 1.52 1.87 2.23 2.58 3.292.94 4.00

0.57 0.72 0.86 1.01 1.16 1.46 1.90 2.34 2.79 3.23 4.123.67 5.01

0.68 0.86 1.04 1.22 1.39 1.75 2.28 2.81 3.35 3.88 4.944.41 6.01

0.80 1.00 1.21 1.42 1.63 2.04 2.66 3.28 3.90 4.53 5.775.15 7.01

0.91 1.15 1.39 1.62 1.86 2.33 3.04 3.75 4.46 5.17 6.595.88 8.01

1.03 1.29 1.56 1.83 2.09 2.62 3.42 4.22 5.02 5.82 7.426.62 9.01

1.14

1.26

1.37

1.49

1.60

1.71

1.83

1.44

1.56

1.73

1.87

2.01

2.16

2.30

1.73

1.91

2.08

2.25

2.43

2.60

2.78

2.03

2.23

2.44

2.64

2.84

3.05

3.25

2.32

2.56

2.79

3.02

3.26

3.49

3.72

2.92

3.21

3.50

3.79

4.08

4.38

4.67

3.80

4.18

4.57

4.95

5.33

5.71

6.09

4.69

5.16

5.63

6.10

6.57

7.04

7.51

5.58

6.14

6.70

7.25

7.81

8.37

8.93

6.47 8.24

7.11

7.76

8.41

9.05

9.70

10.35

9.07

9.89

10.72

11.54

12.36

13.19

7.35 10.02

8.09

8.83

9.56

10.30

11.03

11.77

11.02

12.02

13.02

14.02

15.03

16.03

Face Velocity(FPM)

IntakePD" W.G.

W (inches)H(inches)

12 14 16 18 20 24 30 36 42 48 6054 72

12

16

20

24

28

32

36

40

44

48

52

56

60

64

68

72

200 300 400 500 600 700 800 900 1000 1200 1400 1600

0.005 0.012 0.018 0.030 0.037 0.047 0.065 0.081 0.097 0.125 0.155 0.185

EFFECTIVE FREE AREA (AK)

kV

K

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Page 16: Dampers and Louvers

ROOF TYPE FRESH AIR LOUVERS

APPLICATION

Shahrokhi roof type fresh air louvers are

used for provide necessary fresh air in

spaces air handling unit rooms , air

condensers and cooling towers locations ,

mechanical rooms and etc.These louvers have a low resistance in

exhaust or intake air flow because of high

free area and blades designed to prevent

rain penetration inside.

����":5�*$������������T� �

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'(�����

SH.LOU.FAR

DESCRIPTION

Shahrokhi roof type fresh air louvers are

constructed for fixing on the roof and so a

four ways slide sheet lay on the top

(figure 12).

%�3�4��

�8 �KJ��"#���������������":5�*$��������������T� �

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(FIGURE 12)

SLIDE SHEET

H

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Page 17: Dampers and Louvers

ORDERING CODE

Shahrokhi roof type freshair louvers are

specified with following ordering code.

/ �+-�(�

�$�/ �+-�(���������������":5�*$������������T� �

'(������XW:�

SH : Shahrokhi manufacture

LOU :

FAR :

W x L x H :

Louver

Roof type freshair louver

Width (inch) x Length (inch) x Height (inch)

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8��

����":5�*$���������T� �

: LOU

: FAR

YZ�@[���B .�n�@[���B G�+� ��@[���Bx x : W x L x H

SH.LOU.FAR- W x L x H

MATERIAL & FINISH

High quality 1.5mm. thickness iron

galvanized or aluminium sheet for frame and

blades and slide sheet.White polyester liquid or powder coating

finish is also available or any other specified

color with raul code up or requirement.

Either is possible to supplied these louvers

with galvanized 10mm. x 10mm. mesh bird

screen , aluminium washable air filter as

optional.

p� �8�����

���;�������Q����*�������)�\ 8�$�� �(U����3+&�8���*5�8�P�!

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'���

�)*(�5�� ���KJ����<���1��TN�10mm. x 10mm.

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Page 18: Dampers and Louvers

0.8

81.1

31.3

81.6

31.8

82.1

32.3

82.6

32.8

83.1

33.3

83.6

33.8

84.1

34.3

84.6

34.8

85.1

35.3

85.6

35.8

8

1.4

61.8

82.2

92.7

13.1

33.5

43.9

64.3

84.7

95.2

15.6

36.0

46.4

66.8

87.2

97.7

18.1

38.5

48.9

69.3

89.7

9

2.0

42.6

33.2

13.7

94.3

84.9

65.5

46.1

36.7

17.2

97.8

88.4

69.0

49.6

310.2

110.7

911.3

811.9

612.5

413.1

313.7

1

2.6

33.3

84.1

34.8

85.6

36.3

87.1

37.8

88.6

39.3

810.1

310.8

811.6

312.3

813.1

313.8

814.6

315.3

816.1

316.8

817.6

3

3.2

14.1

34.0

45.9

66.8

87.7

98.7

19.6

310.5

411.4

612.3

813.2

914.2

115.1

316.0

416.9

617.8

818.7

919.7

120.6

321.5

4

3.7

94.8

85.9

67.0

48.1

39.2

110.2

911.3

812.4

613.5

414.6

315.7

116.7

917.8

818.9

620.0

421.1

322.2

123.2

924.3

825.4

6

4.3

85.6

36.8

88.1

39.3

810.6

311.8

813.1

314.3

815.6

316.8

818.1

319.3

820.6

321.8

823.1

324.3

825.6

326.8

828.1

329.3

8

4.9

66.3

87.7

99.2

110.6

312.0

413.4

614.8

816.2

917.7

119.1

320.5

421.9

623.3

824.7

926.2

127.6

329.0

430.4

631.8

833.2

9

5.5

47.1

38.7

110.2

911.8

813.4

615.0

416.6

318.2

119.7

921.3

822.9

624.5

426.1

327.7

129.2

930.7

932.4

630.0

435.6

337.2

1

6.1

37.7

99.6

311.3

813.1

314.7

916.6

318.3

820.1

321.8

823.6

325.3

827.1

328.8

830.6

332.3

834.1

335.8

837.6

339.3

841.1

3

6.7

18.6

310.5

412.4

614.3

816.2

918.2

120.1

322.0

423.9

625.8

827.7

929.7

131.6

333.5

435.4

637.3

839.2

941.2

143.1

345.0

4

7.2

99.3

811.4

613.5

415.6

317.7

119.7

921.8

823.9

626.0

428.1

330.2

132.2

934.3

836.4

639.5

440.6

342.7

144.7

946.8

848.9

6

7.8

810.1

312.3

814.6

316.8

819.1

321.3

823.6

325.8

828.1

330.3

832.6

334.8

837.1

339.3

841.6

343.8

846.1

348.3

850.6

352.8

8

8.4

610.8

813.2

915.7

118.1

320.5

422.9

625.3

827.7

930.2

132.6

335.0

437.4

639.8

842.2

944.7

147.1

349.5

451.9

654.3

856.7

9

9.0

411.6

314.2

116.7

919.3

821.9

624.5

427.1

329.7

132.2

934.8

837.4

640.0

442.6

345.2

147.7

950.3

852.9

655.5

458.1

360.7

1

9.6

312.3

815.1

317.8

820.6

323.3

826.1

328.8

831.6

334.3

837.1

339.8

842.6

345.3

848.1

350.8

853.6

356.3

859.1

361.8

864.6

3

P=

2(W

+L

)(f

ee

t)H

(in

ch

es

)4

56

78

910

11

12

13

14

15

16

17

18

19

20

21

22

23

24

12

16

20

24

28

32

36

40

44

48

52

56

60

64

68

72

0.4

25

0.3

90

1600

0.3

10

0.2

80

1400

0.2

25

0.1

93

1200

0.1

59

0.1

42

1000

0.1

28

0.1

10

900

0.1

00

0.0

87

800

0.0

80

0.0

66

700

0.0

59

0.0

50

600

0.0

44

0.0

37

500

0.0

28

0.0

23

400

0.0

14

0.0

11

300

0.0

07

0.0

06

200

Fa

ce

Ve

loc

ity

(FP

M)

Inta

ke

PD

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Ex

ha

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D"

W.G

.

PD

:

AK

:

P:

W:

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CF

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To

talp

ressu

red

rop

in

inch

wa

ter

ga

ge

.

Effe

ctive

fre

ea

rea

in

sq

ua

refe

et=

CF

M/

VK

Insid

ep

erim

ete

r2

(w+

l)in

fee

t

Wid

tho

flo

uve

r

He

igh

to

flo

uve

r

Le

ng

ht

of

lou

ve

r

Air

qu

an

tity

Fa

ce

ve

locity

inF

PM

k

SH

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Page 19: Dampers and Louvers

GRAVITY SHUTTER DAMPERS

APPLICATION

Shahrokhi gravity shutter dampers are used

for remain constant level of air pressure

such as painting rooms , diesel generator

rooms , industrial kitchens , industrial air

conditioning and etc.

��$8������

� � ������"��i� �:S�=��1��k�� ����������������$8������

D� ����q�.�������\����D�p� ����\�����������#��<�� �

*��+,-��� ���*�l�8�����&����#��D��,6�&����������Q

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SH.LOU.GSH

DESCRIPTION

Shahrokhi gravity shutter dampers have

multi parallel blades with a linkage

mechanism which automatically open when

increase air pressure and close by the

gravity of blades (figure 13).Special rubber are used to eliminate sound

when closing the blades.The brass or nylon bush are fixed to frame

to easily open and close the blades.Either is possible to supplied these gravity

shutter dampers with galvanized 10mm. x

10mm. mesh bird screen , aluminium

washable air filter and ducted dampers as

optional.

%�3�4��

�(���;���;����<��=�����*5����(6����������$8������

��:S�7����S�����=���������% �J�����(� ���>�(<������J,�

(�������,C������*5��$8�� -������Q�7��������8�D�$�������

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=�,-r�$����*5��(���,C��;�>�������(&�st`� �������

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'������KJ�����R��������O���/���P�!

10mm. x 10mm. �)*(�5�� ���KJ����<���1��TN�

���.��������8��:,C�����!�����������Q�,R�S�D�*�������)

'� ������8�$����% �&� ����$8������

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Page 20: Dampers and Louvers

ORDERING CODE / �+-�(�

'(������XW:���$�/ �+-�(�������������$8������

SH : Shahrokhi manufacture

LOU :

GSH :

W x H :

Louver

Gravity shutter damper

Width (inch) x Height (inch)

�������,6�&����� �� : SH

8��

��$8��T� �

: LOU

: GSH

YZ�@[���B G�+� ��@[���Bx : W x H

SH.LOU.GSH- W x H

MATERIAL & FINISH

High quality 0.8mm. thickness extruded

aluminium profile in matt aluminium

anodized finish for frame and blades.White polyester liquid or powder coating

finish is also available or any other specified

color with raul code up on requirement.

Shahrokhi gravity shutter dampers are

specified with following ordering code.

p� �8�����

;�������Q�\ 8�����::��;�������Q���S85�$����*5�8�P�!

���;�������Q�*(�$�����Q�7�8 ����,N�R���o]E�"��W4���

'(��������#��K-����"�+��

7��5�/8 �������#������Q�p� ����� ������8���<���1��

,-��R5�$��*��+,-�����@=���,-�8,<��B�� ��5���������p�

$���������������XW:��.� �* �N������>���p� �����(�+-

'����;�O��

(FIGURE 13)

ALL DIMENSION IN mm.

43.0

BRASS OR

NYLON BUSH

������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHI 2E

Page 21: Dampers and Louvers

0.77 0.91 1.05 1.19 1.33 1.62 2.04 2.47 2.90 3.32

1.04 1.22 1.42 1.61 1.80 2.19 2.76 3.34 3.91 4.49

1.31 1.55 1.79 2.03 2.27 2.76 3.48 4.21 4.93 5.66

1.58 1.87 2.16 2.45 2.74 3.33 4.20 5.08 5.95 6.83

1.85 2.19 2.53 2.87 3.21 3.90 4.92 5.95 6.97 8.00

2.12 2.51 2.90 3.29 3.68 4.47 5.64 6.82 7.99 9.17

2.39 2.83 3.27 3.71 4.15 5.04 6.36 7.69 9.01 10.34

2.66 3.15 3.64 4.13 4.62 5.61 7.08 8.56 10.03 11.51

2.93 3.47 4.00 4.55 5.09 6.18 7.80 9.43 11.05 12.68

3.20 3.79 4.38 4.97 5.56 6.75 8.52 10.30 12.07 13.85

Face Velocity(FPM)

ExhaustPD" W.G.

W (INCH)H(INCH)

12 14 16 18 20 24 30 36 42 48

12

16

20

24

28

32

36

40

44

48

200 300 400 500 600 700 800 900 1000 1200 1400

0.043 0.068 0.092 0.130 0.160 0.180 0.220 0.260 0.300 0.340 0.370

SH.LOU.GSH

��$8�������%�U-�3��.8(�ENGINEERING PERFORMANCE DATA

PD :

AK :

W :

H :

CFM :

V :

Total pressure drop in inch water gage.

Effective free area in square feet=CFM / VK

Width of louver in inch

Height of louver in inch

Air quantity

Face velocity in FPM

k

k

V

EFFEVCTIVE FREE AREA (AK)

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Page 22: Dampers and Louvers

SAND LOUVERS

APPLICATION

Shahrokhi sand louvers are used for prevent

sand entry to inside.These are applied in building exteriors

specially industrial plants.

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� � ��8�1���8 8�$����)�R�� ������������������)�-��

'(��)��� �!�*��+,-��� ����R������uS�����-��

������<���&�J������N,��-���N���8 � �����)�-���1��

'(� ����� ����,6�&

SH.SAL.H SH.SAL.L

DESCRIPTION

Shahrokhi sand louvers are supplied in two

types of spaces with low (Figure 14) and

heavy (Figure 15) flows.

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'(�������,��-�@2^��<�B����$�8�@2H��<�B�����-���8�1�

(FIGURE 14) (FIGURE 15)

ALL DIMENSION IN mm.ALL DIMENSION IN mm.

75.0

100.0

50.0

100.0

60

BRID SCREEN

100.0

75.0

������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHI Ao

Page 23: Dampers and Louvers

MATERIAL

It is possible to use a special fan to prevent

sand entry to industrial mechines or special

spaces and for transfer it to another spaces

(figure 16).

High quality 1.5mm. thickness iron

galvanized or aluminium sheet for frame and

blades.

Either is possible to supplied sand louvers

with galvanized 10mm.x 10mm. mesh bird

screen , aluminium washable air filter and

ducted damper as optional.

����

8�1���8 8�$����)�R�� ������������ ������8�"�R��!�1��

����#�Q�.�a,���8�j�������uS�����,6�&���#��>,-������-��

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2]^�"���W4����;��������Q����*��������)�\ 8�$�����*5�8�P��!

'(��������#��K-����"�+������,N�R��

10mm.x 10mm. �)*(�5�� �����KJ�����<���1��TN�

���.���������8��:,C�����!�����������Q��,R�S�D�*$������)

'� ������8�$����% �&� ���)�-��

(FIGURE 16)

SPECIAL FAN

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Page 24: Dampers and Louvers

ORDERING CODE

Shahrokhi sand louvers are specified with

following ordering code.

/ �+-�(�

'(������XW:���$�/ �+-�(���������������)�-��

SH : Shahrokhi manufacture

SAL : Sand louver

T : type : L :

H :

LF :

Low sand flow

Heavy sand flow

Low sand flow with fan

W x H : Width (inch) x Height (inch)

�������,6�&����� �� : SH

�)�-�� : SAL

����-���8�1���������$��-���8�1������

1S�*�N#�������-���8�1������

: L

: H

: LF

:�)�-���G�� :: T

YZ�@[���B G�+� ��@[���Bx : W x H

SH.SAL.T- W x H

FIXING DETAILS

Aslide sheet is used for exit sand in low sand

flow (Figure 17).It is possible to fixed this slide sheet over the

sand louver in factory (Figure 18).

KJ��%��v��

�-��8�1�������������#��<�� ���-���8�1��h8��"#�

'@2F��<�B�������*��+,-�� �(U����3+&�=��$����

�8 ������ ��� �� �(U����3+&�1������� ������8���<���1��

'@2E��<�B���)�KJ���)�-��

(FIGURE 17) (FIGURE 18)

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Page 25: Dampers and Louvers

0.33 0.50 0.67 0.83 1.00 1.18 1.34 1.51 1.68 1.86 2.03

0.50 0.76 1.00 1.27 1.52 1.79 2.04 2.30 2.55 2.81 3.07

0.67 1.00 1.35 1.70 2.05 2.40 2.73 3.08 3.42 3.77 4.12

0.83 1.27 1.70 2.13 2.56 3.00 3.43 3.86 4.29 4.73 5.16

1.00 1.52 2.05 2.56 3.09 3.60 4.13 4.64 5.17 5.68 6.21

1.09 1.65 2.22 2.78 3.35 3.91 4.47 5.03 5.60 6.16 6.72

1.26 1.91 2.56 3.21 3.86 4.52 5.17 5.82 6.47 7.12 7.77

1.43 2.16 2.91 3.64 4.38 5.11 5.86 6.59 7.33 8.07 8.81

1.60 2.43 3.24 4.07 4.90 5.72 6.55 7.38 8.20 9.03 9.86

1.77

1.94

2.68

2.94

3.59

3.94

4.50

4.95

5.42

5.94

6.33

6.94

7.25

7.95

8.16

8.95

9.07

9.94

9.99

10.94

10.90

11.95

100

0.022

200

0.071

300

0.174

400

0.310

500

0.450

600

0.590

700

0.720

800

0.860

Face Velocity(FPM)

IntakePD" W.G.

W (INCH)H(INCH)

12 18 24 30 36 42 48 54 60 66 72

12

18

24

30

36

42

48

54

60

66

72

����-���8�1�����������)�-���%�U-�3��.8(�ENGINEERING PERFORMANCE DATA

PD :

AK :

W :

H :

CFM :

V :

Total pressure drop in inch water gage.

Effective free area in square feet=CFM / VK

Width of louver in inch

Height of louver in inch

Air quantity

Face velocity in FPM

EFFECTIVE FREE AREA (AK)

k

k

V

SH.SAL.L

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Page 26: Dampers and Louvers

0.21 0.36 0.50 0.65 0.79 0.94 1.08 1.23 1.38 1.52 1.67

0.42 0.71 1.00 1.28 1.57 1.86 2.15 2.43 2.72 3.01 3.30

0.64 1.07 1.51 1.94 2.38 2.81 3.25 3.69 2.72 3.01 3.30

0.80 1.35 1.90 2.45 3.00 3.55 4.10 4.65 5.20 5.75 6.30

1.06 1.78 2.50 3.23 3.95 4.67 5.40 6.12 6.84 7.57 8.29

1.24 2.09 2.94 3.79 4.64 5.49 6.35 7.20 8.05 8.90 9.75

1.44 2.43 3.42 4.41 5.39 6.38 7.37 8.36 9.35 10.33 11.32

1.69 2.85 4.01 5.17 6.33 7.49 8.65 9.81 10.97 12.13 13.29

1.85 3.11 4.38 5.64 6.91 8.18 9.44 10.71 11.97 13.24 14.50

2.08

2.30

3.50

3.88

4.92

5.45

6.35

7.03

7.77

8.61

9.20

10.19

10.62

11.76

12.04

13.34

13.47

14.92

14.89

16.49

16.32

18.07

Face Velocity(FPM)

IntakePD" W.G.

W (inches)H(inches)

12 18 24 30 36 42 48 54 60 66 72

12

18

24

30

36

42

48

54

60

66

72

200 300 400 500 600 700 800 900 1000 1200 1400 1600

0.009 0.017 0.030 0.050 0.065 0.080 0.125 0.156 0.211 0.280 0.371 0.485

SH.SAL.H

EFFECTIVE FREE AREA (AK)

���$��-���8�1�����������)�-���%�U-�3��.8(�ENGINEERING PERFORMANCE DATA

PD :

AK :

W :

H :

CFM :

V :

Total pressure drop in inch water gage.

Effective free area in square feet=CFM / VK

Width of louver in inch

Height of louver in inch

Air quantity

Face velocity in FPM

k

k

V

������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHI AH

Page 27: Dampers and Louvers

SPILIT DAMPERS

APPLICATION

Shahrokhi spilit dampers are used for suit

airflow patterns volume for branch when it

isn`t possible to made of a take off in main

rectangular ducts.

�����"�R-�

� � ���������<���������#��<�� ��������������"�R-�

��������(�����,��(�����8�/�) �#0��R&��.�����$��P�6:��

'(������*��+,-�����������r�$���U-�����O`�"��(�

SH.DDA.SD

DESCRIPTION

Shahrokhi spilit dampers are made of a

frame and a movable sheet.It is possible to adjust this movable sheet in

any different angles (figure 19).

%�3�4��

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'"-��*(�����<:�

VR,W������8$� ��� �93,���3+&�1�������� ������8���<���1��

'@2g��<�B���N�������

(FIGURE 19)

ALL DIMENSION IN mm.

MAX 30

50.0

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Page 28: Dampers and Louvers

ORDERING CODE / �+-�(�

'(������XW:���$�/ �+-�(�����������������"�R-�

SH : Shahrokhi manufacture

DDA :

SD :

W x H :

Ducted damper

Spilit damper

Width (inch) x Height (inch)

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��������� : DDA

���"�R-� : SD

YZ�@[���B G�+� ��@[���Bx : W x H

SH.DDA.SD - W x H

MATERIAL

High quality 1.5mm. thickness iron

galvanized or aluminium sheet for frame and

the movable sheet.

shahrokhi spilit dampers are specified with

following ordering code.

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Page 29: Dampers and Louvers

DEFLECTORS

APPLICATION

Shahrokhi deflectors are used for suit airflow

patterns when it isn`t possible to made of a

bend in main rectangular ducts.

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� � �������$��������<���������#��<�� ����������� �,<RS�

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SH.DDA.DE

DESCRIPTION

Shahrokhi deflectors are made of a frame

and multi parallel U shape blades.Either is possible to adjust these blades in

any different angles with a linkage

mechanism (figure 20).

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�� �<�����*5����(6��8�P�!�=��$����������� �,<RS�U

'"-��*(����<:��(���,S)� �!�>�(<��%�$������

�Q��(���;���;����<�������������� ���*5�1����������1��TN�

'@Ao��<�B���N��������VR,W������8$� �

(FIGURE 20)

ALL DIMENSION IN mm.

50.0

MAX 30

51.0

100.0

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Page 30: Dampers and Louvers

ORDERING CODE / �+-�(�

'(������XW:���$�/ �+-�(�������������� �,<RS�

SH : Shahrokhi manufacture

DDA :

DE :

W x H :

Ducted damper

Deflector

Width (inch) x Height (inch)

�������,6�&����� �� : SH

��������� : DDA

�,<RS� : DE

YZ�@[���B G�+� ��@[���Bx : W x H

SH.DDA.DE - W x H

MATERIAL

High quality 1.5mm. thickness iron

galvanized or aluminium sheet for frame and

blades.

Shahrokhi deflectors are specified with

following ordering code.

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Page 31: Dampers and Louvers

AIR TRANSFER LOUVERS

APPLICATION

Shahrokhi air transfer louvers are designed

to transfer air form air conditioning space to

another space which have no airconditioning

system.It canbe fixed these louvers on the walls ,

doors or partitions.

����.�a,�������T� �

� � ��=��$������.�a,��� �������������������.�a,�������T� �

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'(��*(���`�n�(���������#�

��1:�� �5������ ��D��� ������8 ����������� ����T� ��1��

'��N��KJ�

SH.LOU.TL

DESCRIPTION

Shahrokhi air transfor louvers are

constructed from a frame and the core of

parallel V-bars.It is possible to use an auxiliary frame or two

rows V-bars to consider the wall or partition

thicknesses (Figures 21&22).

%�3�4��

���*5����(6��8�P�!�=��$�������������.�a,�������T� �

'"-��*(����<:��(���,S)� �!�>�(<��%�$��������� �<�V

1:�� �5���� ��������"��W4���������������� ������8���<���1��

���*��+,-��sn�8�� � *5�V�� 8������<N��P�!�=��$�

'@AA�8�A2�����<�B

(FIGURE 21) (FIGURE 22)

ALL DIMENSION IN mm.ALL DIMENSION IN mm.

20.020.0 32.032.0

32.0

32.0

32.0

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Page 32: Dampers and Louvers

ORDERING CODE

Shahrokhi air transfer louvers are specified

with following ordering code.

/ �+-�(�

XW:���$�/ �+-�(����������������.�a,�������T� �

'(�����

MATERIAL & FINISH

High quality 1.5mm. thickness extruded

aluminium profile in matt aluminium

anodized finish for frame and blades.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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p� ��7��5�/8 �������#������Q�p� ����� ������8���<���1��

���(�+-�,-��R5�$��*��+,-�����@=���,-�8,<��B�� ��5��������

'����;�O���$���������������XW:��.� �* �N������>���p� ��

SH : Shahrokhi manufacture

LOU : Louver

T : type : TL1 :

TL2 :

One row air transfer louver

Two row air transfer louver

W x H : Width (inch) x Height (inch)

�������,6�&����� �� : SH

8�� : LOU

: TL1

: TL2

: �T� ��G�� : T

YZ�@[���B G�+� ��@[���Bx : W x H

SH.LOU.T- W x H

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Page 33: Dampers and Louvers

AIR FILTERS

APPLICATION

Shahrokhi air filters are used for prevent

passing the exist particles in air.These filters fixed in air entrance of

machines such as air handling units,

Airwashers , Packaged units , Fancoils and

etc.

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� � ��%� M� �UZ�$����)�R�� ����������������������,R�S

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*�l�8���#R���1S�D����"�����w�<5�D������8���D����$�-���

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SH.AFW

DESCRIPTION

Shahrokhi air filters are constructed of a

frame and a number of core mesh in 1 , 2 and

4 inches thicknesses to consider the fixing

location conditions.These filters have a low resistance in airflow

passing and are washable (figure 23).

%�3�4��

KJ���3��?�3��?�����������������������������,R�S

=U:��� �����r�(�0�8�P�!��=��$��[����H�8�A�D�2���#,��W4� �

'(�������,��-

8��,������������� �UZ����� ���N��"�8�a����,R�S�1��

'@AI��<�B�(��������:,C�����!

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(FIGURE 23)

ALL DIMENSION IN mm.

40

T

Page 34: Dampers and Louvers

ORDERING CODE

Shahrokhi air filters are specified with

following ordering code.

/ �+-�(�

'(������XW:���$�/ �+-�(�������������������,R�S

SH : Shahrokhi manufacture

AFW : Washable air filter

T : type : T1 :

T2 :

T4 :

Air filter with 1 inch thick.

Air filter with 2 inch thick.

Air filter with 4 inch thick.

W x H : Width (inch) x Height (inch)

�������,6�&����� �� : SH

�:,C�����!������,R�S : AFW

[����2�"��W4����,R�S[����A�"��W4����,R�S[����H�"��W4����,R�S

: T1

: T2

: T4

: ,R�S�G�� : T

YZ�@[���B G�+� ��@[���Bx : W x H

SH.AFW.T-W x H

MATERIAL

High quality 1.5mm. thickness iron

galvanized or aluminium sheet for frames

and galvanized or aluminium material for

meshes.

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Page 35: Dampers and Louvers

������8�����#�:�5�"Z-Recommended delivery Velocities

�� �����#�:�5�"Z-

������8�

(m/s)

APPLICATION

Recommendeddelivery

Velocities(m/s)

Quantity Imperial Unit Metric UnitForm Imperial

To MetricMultiply By:

Form MetricTo ImperialMultiply By:

(��`�8���(�U��.8(��Conversion Table

2]^���A]^

A]^���I]^

A]^���H]^

I]^���^]^

H]^���e

^���2o

1.5 - 2.5

2.5 - 3.5

2.5 - 4.5

3.5 - 5.5

4.5 - 6

5 - 10

7W5��������,-�

?U4�8��(&��������,-�

=�$������1��-�D%C������1��-

x ����#-y��8������W��,�

���1��-��D�,������#!�����D���<C����������D�#��N� �5Q

(��C��8��#��,- �N���D�&�J����S��D�k�

� ����tl���#���-�D�#R,��D�#�� �,- �Dz �����S�

���NZ���#���-�8

������*�#!�D���������#!����D��8��

�#��>�8S�8

��q� �)�D�#��) ���D� -�,��%�O��� ��

/8S���S��8

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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Page 36: Dampers and Louvers

c���{�"UC�

'(�������T� ���<U��G�+� �����YZ�"UC�

cf�a-

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�C�

��5��U���8��T� ������v��5��U��1������NZ��R&�S

'(�������%�S��KC`������������r�����5

% �`��� ��sy,���8�"Z-�D����5�.�n����f�a-� �(a�

'�� ����>,C��\���������8�"S �����1��

��S�%�`y &�

c��8��� a��m - (A )

�����������r� �UZ�"#������(�������T� ��=��"`�C�

�6������8���"Z-���B ��8���"Z-������� a�V

� ����D�(�����*(����)*$�(����U-����*�>,-��?-���@���

'��)��� �!�*��+,-�

�U-�3�CFM �,C������)*$�(���*�3��8���)*$�(���� a�

'(��N��XW:��� �_�!��*(�

k

k

k kCFM=A x V

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.

ci|��� a��m - (A )

��UZ�"#�����"-����T� ��=��X�����m -�1��,<0��

���!�*���+,-��� �����T� ���C��_��n�$��������������r

'��)��

"Z-�* ����S����"Z-�}��(`��U-��3��"#��m -�1���

'������*��+,-���T� ��$������ �UZ

*(������)*$�(�����"Z�-�����������D������T� ����,:��� �

���8��� a��m -�.���6��8��,�����>,C����� a�

'"-�

EE

The smallest net area of a grille utilized by

the air stream in passing through the grille

passages.It determines the maximum or jet velocity of

the air in the grille. In many grilles, theA occurs at the velocity measuring point

and is equal to the outlet area,A

Effective area (A ):

A

A

E

E

K

K

������ ����� �����SHAHROKHI MANUFACTURING CO.SHAHROKHI IH

Page 37: Dampers and Louvers

c�=���,-�� �:S ( )P

X�W:���O`�=����������PQ�[����KC`����"U}�� �:S

*�)�R��)� ���&���JW��*(����`�n�;$�����8(���� 8�������

'� ������8��T� �

S

c��,Z-� �:S (P )

�O`�=����������PQ�[����KC`�����,Z-�.��6�� �:S

'� ������8��T� ��=� �����XW:�*�)�R)� �

v

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.

2

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 ):

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 ):

c�8��7W5

���� a�� ��%�S�KC�`�������������r�R��Y�Z�}��(`

'(������*(����)*$�(������#��"Z-���

c�����5 (T)

K�C`���� a��=���$����R6���3��������T�� ��=���R�&�S

"Z-�������(�- �������������r�"�`��� (������%�S

'(������(�5�7��� �JW:����#�(V )T

c���8��"Z- (V )

=��?�-�� � a���=�� ���*(����)*$�(����"Z-1�6�

'(������j�JW� *�>�,-�

���(�6��?-8��,���D.8�(�,��% �J������8���"Z-�~���

'(������*(����)*$��(���1�6� "Z-

@�����6������8��� a��m -���Bk k

k

CFM = A x V

c��� �:S (P )

�� ��,Z�-� ���:�S�8 =����,-�� �:S�G�NO�(P ) (P )

'� ������8��T� ���*�)�R)� ��XW:��������O`�=�����

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 ):

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Page 38: Dampers and Louvers

c�(&�% (!�m - (L )

c�(&� �:S�m - (L )

c*(��.������8$

?�����=��"3����T� ��=��?-���*(��(�����������(&

*�>,-��=�����*(��.�����\�������7���$Q�\���� ���(&� �:S

��)*$�(��� ��8<���o]oooA����U������(&�m -���)*$�(��

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*(���������Q�=�����8��,������(���� ��"-��1<N���(&� �:S

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'(������)*$�(��

8��,������(�����L����S�7�������8(�� ���.��`� ���j���

'(������\����j�JW��=�,-��Q�*(��Pt�����a� � -���

'(����%�8�2o��8���2o���1����,C����~�����U�

*�8(3�����"-��*(�����#����uS�=��$��D�R�����,`�C�

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'(����1��$�m -

W

P

W

P

The total sound created by a grille under a

specific condition of opreation not including

specific room acoustic absorption value

reductions per frequency octave bounds.

The basis of rating must be stated re

10 watts, or 10 watts.

The sound pressure measured in the test

room or occupied room with a sound level

meter referenced to 0.0002 microbar.Sound pressure may be measured in octove

bands with an octave band analyzer or total

sound pressure in all octave bands can be

measured.

That interior area of a conditioned space

which extends to within 6 inches of all room

walls and to a height of 6 feet above the

floor.

Sound Power Level (L ):

Sound Pressure Level (L ):

Occupied zone:

-12 -13

�2A�2I

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.

Noise Criteria (NC) : c��(&������ (NC)

��?����=��"3�� �:S�m -�KC`����T� ����(&�~�

�(a��8����� ���!���������������(�������JW:�� ���.��`

'� ���>,C��\����j�JW��=�,-��� Pt�

2E���#�� �(&�% (!�m -�����(&�������~�����a�(LW)

'� ����>,C��8�,������(����;�N�� ��\���� � 7�������-��Q

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

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

designated point.

TTerminal Velocity (V ): c����#��"Z- (V )

=������T� ��$������5��C����#,��� �����������r��"Z-

'(�������a�!�� ��%�S�KC`����JW:��� a�

T

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Page 39: Dampers and Louvers

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.

Page 40: Dampers and Louvers