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LOUVERSOUVERS
WE SHAPEE SHAPE
AIR IR
PRODUCTS CATALOGUERODUCTS CATALOGUE
PRODUCT BULLETINRODUCT BULLETIN
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Dubai Head Office:
Tel: +971 4 706 9777
Fax: +971 4 706 9787
Abu Dhabi Branch:
Tel: +971 2 645 0107
Fax: +971 2 645 0167
Email: betai@betag.com
P.O.Box 50708, DubaiUnited Arab Emirates
Dubai Head Office:
Tel: +971 4 706 9777
Fax: +971 4 706 9787
Abu Dhabi Branch:
Tel: +971 2 645 0107
Fax: +971 2 645 0167
Email: betai@betag.com
P.O.Box 50708, Dubai
United Arab Emirates
w w w . b e t a g . c o mw w . b e t a g . c o m
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indexndex
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1
2
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GRAVITY AIR LOUVERSRAVITY AIR LOUVERS
EXHAUST AIR LOUVERSXHAUST AIR LOUVERS
FRESH AIR LOUVERS - HINGEDRESH AIR LOUVERS - HINGED
FRESH AIR LOUVERSRESH AIR LOUVERS
SAND TRAP LOUVERSAND TRAP LOUVERS
ROUND EXHAUST LOUVER - IMP KLIMAOUND EXHAUST LOUVER - IMP KLIMA
PERFORMANCE CHART (STL & GAL)ERFORMANCE CHART (STL & GAL)
PERFORMANCE CHART (EAL & FAL)ERFORMANCE CHART (EAL & FAL)
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LOUVERSOUVERS
GRAVITY AIR LOUVERSRAVITY AIR LOUVERS
Extruded
Aluminum Profile
1.2 mm thk
Extruded
Aluminum Profile
1.2 mm thk
45mm5mm45mm5mm
m
B +
1 0
m
B + 1 0 m m
B
mm
5
B +
0 m m
B +
5 0
m m
7 1
7 1
7 1
7 1
Foam Gasket (optional)oam Gasket (optional)
NON RETURN DAMPERON RETURN DAMPER GRAVITY AIR LOUVERS (DUCTED)RAVITY AIR LOUVERS (DUCTED)
ALUMINIUM FRAME
1.8 MM THK
ALUMINIUM FRAME
1.8 MM THK
10000
CONNECTING
ROD (OPTIONAL)
CONNECTING
ROD (OPTIONAL)
Extruded
Aliminium profile
1.2 MM Thk
Extruded
Aliminium profile
1.2 MM Thk
I
D U C T S Z E
I
DUCTSZ
AIR FLOWIR FLOW
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The gravity air louver is a wall
mounted device. It is composed of a set of horizontally mounted blades; they are
normally closed and are free to rotate
about the horizontal axis.
The gravity air louver is a wall
mounted device. It is composed of a set
of horizontally mounted blades; they are
normally closed and are free to rotate
about the horizontal axis.
The blades & frame are manufactured
from aluminum extruded profiles.
The blades & frame are manufactured
from aluminum extruded profiles.
TYPE OF FIXINGYPE OF FIXING
SCREW FIXINGCREW FIXING CLIP FIXINGLIP FIXING
ORDERING SYSTEMRDERING SYSTEM
POWDER COATED FINISH
AS PER RAL CODES
POWDER COATED FINISH
AS PER RAL CODES
WIDTH HEIGHT
MAX SIZE: 2000 MM 2000 MM
WIDTH HEIGHT
MAX SIZE: 2000 MM 2000 MM+
+
GRAVITY AIR LOUVER
GRAVITY AIR LOUVER WITH CONNECTING ROD
NON RETURN DAMPER
NON RETURN DAMPER WITH CONNECTING ROD
GRAVITY AIR LOUVER
GRAVITY AIR LOUVER WITH CONNECTING ROD
NON RETURN DAMPER
NON RETURN DAMPER WITH CONNECTING ROD EXAMPLE : GAL 1000 150 RAL 9O16XAMPLE : GAL 1000 150 RAL 9O16+
FINISHINISH
SIZEIZ E
TYPEYP E
RAL:AL:
SIZE:IZE:
GAL:
GAL - CR:
NRD:
NRD-CR
GAL:
GAL - CR:
NRD:
NRD-CR
ALL DETAILS SUBJECT TO CHANGE WITHOUT PRIOR NOTICELL DETAILS SUBJECT TO CHANGE WITHOUT PR IOR NOTICE011
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EXHAUST AIR LOUVERSXHAUST AIR LOUVERS
LOUVERSOUVERS
TYPE OF FIXINGYPE OF FIXING
Type of Fixing:
Screw fixing
Type of Fixing:
Screw fixing
Clip fixinglip fixing
EXHAUST AIR LOUVERXHAUST AIR LOUVER
( B ) - 1 0 m m
(B1mm
5
m
( B ) - 0 m
5m
(B0m
45 mm5 m m
The exhaust air louver is a weather
proof external cover for air inlet and
discharge openings, suitable for most
external walling and screening applica-
tions.
The exhaust air louver is a weather
proof external cover for air inlet and
discharge openings, suitable for most
external walling and screening applica-
tions.
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The exhaust air louver is composed
of a set of blades made of heavy gauge
aluminium extrusions arranged in
horizontal rows and inclind downward
to protect against rain water.
The exhaust air louver is composed
of a set of blades made o f heavy gauge
aluminium extrusions arranged in
horizontal rows and inclind downward
to protect against rain water.
The exhaust air louver is used in
cooling, heating and air ventilation
applications.
The exhaust air louver is used in
cooling, heating and air ventilation
applications.
RAL:AL:
Anodized:nodized:
SIZE:IZE:
POWDER COATED FINISH
AS PER RAL CODES
ANDOIZED ALUMINUM FINISH
POWDER COATED FINISH
AS PER RAL CODES
ANDOIZED ALUMINUM FINISH
WIDTH HEIGHT
MAX SIZE: 2000 MM 2000 MM
WIDTH HEIGHT
MAX SIZE: 2000 MM 2000 MM
EAL:AL:
EAL / IS:AL / IS:
EXHAUST AIR LOUVER
EXHAUST AIR LOUVER
WITH INSECT SCREEN
EXHAUST AIR LOUVER
EXHAUST AIR LOUVER
WITH INSECT SCREEN
FINISHINISH SIZEIZE TYPEYP E
ORDERING SYSTEMRDERING SYSTEM
EXAMPLE : EAL 1000 150 AnodizedXAMPLE : EAL 1000 150 Anodized
+
+
+
+
ALL DETAILS SUBJECT TO CHANGE WITHOUT PRIOR NOTICELL DETAILS SUBJECT TO CHANGE W ITHOUT PRIOR NOTICE022
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LOUVERSOUVERS
FRESH AIR LOUVERS - HINGEDRESH AIR LOUVERS - HINGED
TYPE OF FIXINGYPE OF FIXING
screw fixingcrew fixing
Clip Fixing
FRESH AIR LOUVER
( )
- 1 0
m m
B
m m
B ( B ) - 5 0 m m
(B5mm
45 mm5 mm
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>>> The fresh air louver is used in cooling,
heating and ventilation application. The
existence of filter provides the entrance
of clean air to the system.
The fresh air louver is used in cooling,
heating and ventilation application. The
existence of filter provides the entrance
of clean air to the system.
The fresh air louver can be opened
like an ordinary door to give flexibility to
acesss the filter for either cleaning or
changing
The fresh air louver can be opened
like an ordinary door to give flexibility to
acesss the filter for either cleaning or
changing
The filter is made of washable
aluminium media. It is attached to the
back of the louver and is easily remov-
able.
The filter is made of washable
aluminium media. It is attached to the
back of the louver and is easily remov-
able.
The fresh air louver is composed of an
exhaust air louver which is fixed to a
frame that contains a filter by means ofsteel hinges.
The fresh air louver is composed of an
exhaust air louver which is fixed to a
frame that contains a filter by means of
steel hinges.
RAL:AL:
Anodized:nodized:
POWDER COATED FINISH
AS PER RAL CODES
ANDOIZED ALUMINUM FINISH
POWDER COATED FINISH
AS PER RAL CODES
ANDOIZED ALUMINUM FINISH
SIZE:IZE: WIDTH HEIGHT
MAX SIZE: 2000 MM 2000 MM
WIDTH HEIGHT
MAX SIZE: 2000 MM 2000 MM
+
+
FINISHINISH SIZEIZE TYPEYP E
ALL DETAILS SUBJECT TO CHANGE WITHOUT PRIOR NOTICELL DETAILS SUBJECT TO CHANGE WITHOUT P RIOR NOTICE033
FALH:
FALHD:
FALH:
FALHD:
HINGED FRESH AIR LOUVER
HINGED FRESH AIR LOUVER
WITH DAMPER
HINGED FRESH AIR LOUVER
HINGED FRESH AIR LOUVER
WITH DAMPER
ORDERING SYSTEMRDERING SYSTEM
EXAMPLE : FALH 1000 150 AnodizedXAMPLE : FALH 1000 150 Anodized+
+
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TYPE OF FIXINGYPE OF FIXING
TYPE OF FIXINGYPE OF FIXING
FINISHINISH SIZEIZE TYPEYP E
ORDERING SYSTEMRDERING SYSTEM
ALL DETAILS SUBJECT TO CHANGE WITHOUT PRIOR NOTICELL DETAILS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE
EXAMPLE : FAL 1000 150 AnodizedXAMPLE : FAL 1000 150 Anodized+
+
044
( B
-
m m
)
1 0
B
mm
( B )
5 0 m m
+
(B5mm+
Screwcrew
Cliplip
45 mm5 mm
LOUVERSOUVERS
FRESH AIR LOUVERSRESH AIR LOUVERS
RAL:AL:
Anodized:nodized:
POWDER COATED FINISH
AS PER RAL CODES
ANDOIZED ALUMINUM FINISH
POWDER COATED FINISH
AS PER RAL CODES
ANDOIZED ALUMINUM FINISH
SIZE:IZE: WIDTH HEIGHT
MAX SIZE: 2000 MM 2000 MM
WIDTH HEIGHT
MAX SIZE: 2000 MM 2000 MM
+
+
FAL:AL:
FALD:ALD:
FRESH AIR LOUVER
FRESH AIR LOUVER WITH DAMPER
FRESH AIR LOUVER
FRESH AIR LOUVER WITH DAMPER
The fresh air louver is a simple formof filter louver. It is composed of an
exhaust louver with an aluminium filter
fixed at the back.
The fresh air louver is used to supplyfresh clean air to the handling units.
The filter is made from washable aluminium media and is fixed on theback of the grille.
Insulating gasket is fixed around theback of the frame to prevent infiltrationbetween the frame and the wall.
Natural andozied aluminium finish.
Powder coated to RAL codes.
The fresh a ir louver is a simple form
of filter louver. It is composed of an
exhaust louver with an alum inium filter
fixed at the back.
The fresh air louver is used to supplyfresh clean air to the handling units.
The filter is made from washable aluminium media and is fixed on theback of the grille.
Insulating gasket is fixed around theback of the fram e to prevent infiltrationbetween the frame and the wall.
Natural andozied aluminium finish.
Powder coated to RAL codes.
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Available types of finishing:vailable types of finishing:
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LOUVERSOUVERS
SAND TRAP LOUVERSAND TRAP LOUVERS
TYPESYPES
SAND TRAP LOUVERAND TRAP LOUVER SAND TRAP LOUVER WITH SAND CHUTEAND TRAP LOUVER WITH SAND CHUTE
H E
G H T
I
S
d
C h u t
a n
e
G H T
H E I
2 0
2 8
2 0
2 8
255766
255
2 8
255
2 8
1 2 0
2 5
6 7
500255
WIDTH (STL)IDTH (STL)
288
HOLEOLE
500
288
WIDTH (STL-C)IDTH (STL-C)
SAND TRAP LOUVERS BOTTOM VIEW DETAILSAND TRAP LOUVERS BOTTOM VIEW DETAILS
FINISHINISH SIZEIZE TYPEYPE
ORDERING SYSTEMRDERING SYSTEM766
2 0
Handle of sand filter Sand filter 20mm thkfreely sliding upward
Handle of sand filterSand filter 20mm thkfreely sliding upward
RAL:AL:
Anodized:nodized:
POWDER COATED FINISH
AS PER RAL CODES
ANDOIZED ALUMINUM FINISH
POWDER COATED FINISH
AS PER RAL CODES
ANDOIZED ALUMINUM FINISH
SIZE:IZE: WIDTH HEIGHT
MAX SIZE: 2000 MM 2000 MM
WIDTH HEIGHT
MAX SIZE: 2000 MM 2000 MM
+
+
SAND TRAP LOUVERAND TRAP LOUVER
SAND TRAP LOUVER WITH SAND CHUTEAND TRAP LOUVER WITH SAND CHUTE
OPTIONSPTIONS
WITH SLIDING FILTERITH SLIDING FILTER
WITH INSECT SCREENITH INSECT SCREEN
STL SF/IS:TL SF/IS:
STLC SF/IS:TLC SF/IS:
SF :F :
IS :S :
055 ALL DETAILS SUBJECT TO CHANGE WITHOUT PRIOR NOTICELL DETAILS SUBJECT TO CHANGE WITHOUT PR IOR NOTICE
Handle rivetedto frameHandle rivetedto frame
Frame of sand filter Frame ofsand filter
View detailfrom arrow A
View detailfrom arrow A Filter ilter
8 2
255
H
H E I G
T
The sand trap louver is made of
aliuminium section. It is composed of twosets of inverted U-channels, mountedvertically on two opposite rows.
The sand trap louver is used at the
fresh air inlet duct of the air handling
units. It can lower the dust loading ofconventional filtration as it is designedto separate large size sand particles atlow to medium speeds. It is also fitted
with a bird screen mesh made of galva-
nized steel to protect against theunwanted objects.
The sand trap louver is a self empty-
ing system. It has a set of holes at thebottom face of the casing to dischargeseparated sand particles.
Can be supplied (as an option ) with :
1 - VCD2 - Wiremesh3 - Sliding filter
The sand trap louver is made of
aliuminium section. It is composed of twosets of inverted U-channels, mountedvertically on two opposite rows.
The sand trap louver is used at the
fresh air inlet duct of the air han dling
units. It can lower the dust loading ofconventional filtration as it is designed
to separate large size sand particles at
low to medium speeds. It is also fitted
with a bird screen mesh made of galva-
nized steel to protect against theunwanted objects.
The sand trap louver is a self empty-
ing system. It has a set of holes at thebottom face of the casing to dischargeseparated sand particles.
Can be supplied (as an option ) with :
1 - VCD2 - Wiremesh3 - Sliding filter
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ROUND EXHAUST LOUVERSOUND EXHAUST LOUVERS
LOUVERSOUVERS
Application :pplication :
Type OZR - 1 circular protection Grilles are used in all kinds of low
pressure air conditioning, air heating and ventelation, where roundsupply and exhasut air opening require protection againstoutside influence (rain, birds, insects etc....).
Type OZR - 1 circular protection Grilles are used in all kinds of low
pressure air conditioning, air heating and ventelation, where roundsupply and exhasut air opening require protection againstoutside influence (rain, birds, insects etc....).
Description :escription :
Type OZR CIRCULAR PROTECTION Grillers are constructed of roundFrame, horizontal blades and protective grille. They are made ofgalvanised sheet metal or aluminium and could be finished with anyRAL paint according to the customer’s request.
Type OZR CIRCULAR PROTECTION Grillers are constructed of roundFrame, horizontal blades and pr otective grille. They are made ofgalvanised sheet metal or aluminium and could be finished with anyRAL paint according to the customer’s request.
Installation on the round tube via the flange.nstallation on the round tube via the flange.Standard sizes and installation:tandard sizes and installation:
sizes D D1 D2 D3 B H
40000 40000
5000063030
80000
90000
1000000
5000063030
80000
90000
1000000
39090
4909062020
79090
89090
99090
41919
5191964949
81919
91919
1029029
45050
5505068080
85050
95050
1070070
255
255255
255
500
500
655
655
377
377377
377
D 3
D 2
D 1
D
D 3
D 2
D 1
D
6
H
D 3
D 2
D 1
D
Installation on the round hole in the sheet.nstallation on the round hole in the sheet.
Chart of total air pressure drop:hart of total air pressure drop:
terminal velocity v (m/s)erminal velocity v (m/s)
Ordering key:rdering key:
OZR / S / RAL / size 500ZR / S / RAL / size 500
size 400, 500, 630, 800,
900, 1000
size 400, 500, 630, 800,
900, 1000
requested RAL
S - zincked sheet
A - Al. Sheet
requested RA L
S - zincked sheet
A - A l . Sheet
Ordering Specification:rdering S pecification:OZR size 400 RAL 9016
Pieces 3
OZR size 400 RAL 9016
Pieces 3
vel.el.
A (m )(m )2
400 500 630 800 900 1000
0.10 0.17 0.27 0.44 0.56 0.69
400 500 630 800 900 1000
0.10 0.17 0.27 0.44 0.56 0.69
From the chart, the total air pressure drop ( Pcel) in respect to
terminal velocity (v) on free sectional area (A) is calculated.
From the chart, the total air pressure drop ( Pcel) in respect to
terminal velocity (v) on free sectional area (A) is calculated.
The right for technical modification reserved.he right for technical mod ification reserved.
ALL DETAILS SUBJECT TO CHANGE WITHOUT PRIOR NOTICELL DETAILS SUBJECT TO CHANGE W ITHOUT PRIOR NOTICE066
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LOUVERSOUVERS
PERFORMANCE CHARTERFORMANCE CHART
>> Test results conducted on similar equipment indicateda typical efficiency of 90% an AC coarse (150 - 700 mIcrons).and 60% on AC fine test ducts (75 - 700) microns)
>> Test results conducted on similar equipment indicateda typical efficiency of 90% an AC coarse (150 - 700 mIcrons).and 60% on AC fine test ducts (75 - 700) m icrons)
>> Free area ratio = 0.32 ( approx.)> Free area ratio = 0.32 ( approx.)
>> To calculate the air flow rate :> To calculate the air flow rate :
CFM= 0.32 A (in”) B(in”) Face velocity(fpm) 144
CFM= 0.32 A (in”) B(in”) Face velocity(fpm) 144
L/S = 0.32 A (mm) B (mm) Face velocity (m/s)
1000
L/S = 0.32 A (mm) B (mm) Face velocity (m/s)
1000
>> For normal operation conditions, sand trap louvers usedfor natural ventilation purpose are rated at a recommended Facvelocity of 1-2m/s
>> For normal operation conditions, sand trap louvers usedfor natural ventilation purpose are rated at a recommended Facvelocity of 1-2m/s
SAND TRAP LOUVERSAND TRAP LOUVERS
Face velocity, m/sace velocity, m/s
0.0 0.5 1.0 1 .5 2.0 2.5 3.0.0 0.5 1.0 1 .5 2.0 2.5 3.0
0.0 100 200 300 400 500 600
100
80
60
40
20
0
200
180
160
140
120
100
80
60
40
20
P r e s s
u r e
D r o p
, P a
Face Velocity, FPMace Velocity, FPM
E
i c i e n c
y %
f f
FACE VELOCITY BASED ON WIDTH (A) HEIGHT (B)ACE VELOCITY BASED ON WIDTH (A) HEIGHT (B)
E
U
P R
S S
R E
D R O
P
GRAVITY AIR LOUVERSRAVITY AIR LOUVERS
>> Free area ratio (approx.) = 0.82 for 100% open blades.> Free area ratio (approx.) = 0.82 for 100% open blades.
>> To calculate the air flow rate :> To calculate the air flow rate :
CFM= 0.82 A (in”) B(in”) Face velocity(fpm) 144
CFM= 0.82 A (in”) B(in”) Face velocity(fpm)
144
L/S = 0.82 A (mm) B (mm) Face velocity (m/s) 1000
L/S = 0.82 A (mm) B (mm) Face velocity (m/s)
1000
0
1 0
0 2
3 0
4 0
5 0
P a
. 0
0
. 0 4
0
0
1 2 .
0
1 .6
0 . 2
0
i n
w . g .
c h
00
01. 2.0 03. 4.0 5.0 m / smfp200 400 600 800 0001
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PERFORMANCE CHARTERFORMANCE CHART
LOUVERSOUVERS
EXHAUST AIR LOUVERSXHAUST AIR LOUVERS
FACE VELOCITY BASED ON WIDTH (A) HEIGHT (B)ACE VELOCITY BASED ON WIDTH (A) HEIGHT (B)
P R E S S U R E D R O P
PRESSURE DROP
0
2 02
4 040
8 080
1 0 0
100
P aP
0 . 0
00
0 . 1 6
06
0 . 3
2
032
0
0 . 4
04
n
. .
i
c h w
g
n
.
.
i
c
w
g
0
0
1.0.0 .2 00 3.0.03.0.0 m / s
pmf
m/s
pm20000 04 00 6000060000
6 060
4
0 . 2
02
0 . 0
8
00 8
FACE VELOCITY BASED ON WIDTH (A) HEIGHT (B)ACE VELOCITY BASED ON WIDTH (A) HEIGHT (B)
E
D R
P
P R
S S U R E
O
E
DRP
PRSSURE O
0
0
22
4 040
8 080
1 0 0
100
P aP
0 . 0
00
0 . 1 6
0
0 . 3
2
03 2
0
0
. 4
004
i n c h w . g .
in
w.g
00
1.0.0 2.0.0 3.0.0 m /spmfm/spm20000 04 00 60000
6 060 0
. 2 4
02 4
0
0 .
8
008
FRESH AIR / FILTER LOUVERSRESH AIR / FILTER LOUVERS
>> Free area ratio ( approx.) = 0.42> Free area ratio ( approx.) = 0.42
>> To calculate the air flow rate :> To calculate the air flow rate :
CFM= 0.42 A (in”) B(in”) Face velocity(fpm) 144
CFM= 0.42 A (in”) B(in”) Face velocity(fpm) 144
L/S = 0.42 A (mm) B (mm) Face velocity (m/s)
1000
L/S = 0.42 A (mm) B (mm) Face velocity (m/s)
1000
>> Free area ratio ( approx.) = 0.37> Free area ratio ( approx.) = 0.37
>> To calculate the air flow rate :> To calculate the air flow rate :
CFM= 0.37 A (in”) B(in”) Face velocity(fpm) 144
CFM= 0.37 A (in”) B(in”) Face velocity(fpm) 144
L/S = 0.37 A (mm) B (mm) Face velocity (m/s) 1000
L/S = 0.37 A (mm) B (mm) Face velocity (m/s) 1000
088 ALL DETAILS SUBJECT TO CHANGE WITHOUT PRIOR NOTICELL DETAILS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE
6 0003 0.0