dasco louvers

for

Pleasant &HealthyAir-Distribution

ISO 9001:2000

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Product Bulletin 136-D Louvers

Pleasant . . Serene. .YOU & DASCO.. .

www.dasco.com.kw

Partners for good health

Since 1964

Introduction

Dasco manufacture a variety types of louvers designed for

intake, exhaust and control air movement applications.

Their strong, clean lines and careful workmanship enhance

the appearance of the building, whether it is industrial,

commercial or domestic. While most of the louvers are

mainly manufactured in complete lines of extruded

aluminium blades, and to complement or accentuate

architectural feature, such as round, arched and angular

structures, Dasco can offer and modify special

louvers incorporating virtually any combination of round,

diagonal and rectilinearframe segments to be suitable for

different applications and architectural requirements.

INTRODUCTION

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Product Range

It is well understood in HVAC engineering, that a proper air conditioning or ventilating system can not operate efficiently without an efficient air movement component device. Hence, louver have been always considered as one of the most important air terminal devices which utilize and control the flow of air in and out of the buildings. Louver structure “frame and blades” can also be modified and reinforced to withstand excessive loads and to play a role in effective weather protection.Plenty of louver blades have been re-developed and many others newly designed to permit and help louversto be complied in many of the recent engineering applications.

PRODUCT RANGE

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GENERAL

Fresh Air Louver

Different types of Dasco louver blades

Sand Louver

Product Range

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(Special heavy duty type)Sand Trap Louver

Pressure Relief Louver(Gravity Shutter)

Penthouse Louver

Sightproof Louver Drainable Louver

Stormproof Louver Acoustic Louver

Fresh Air Louvers

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Fresh Air Louver With Flat Frame(DFL - 11HFF)

FRESH AIR LOUVERS

GENERALDasco fresh a ir louvers (DFL-11H) are considered as an architectural air inlets and outlets with a remarkable clean and aesthetically pleasing appearance. They are widely and successfully used for central airconditioning,ventilation and industrial ventilation systems. These louvers have a low resistance to air flow and high free area, making them a preferred choice for installations which require high air flow.

DESCRIPTIONDFL-11H louvers have a 2 inch deep fixed horizontal vanes (blades) which are carefully designed to get low pressure drop, maximum free area and to prevent wind and rain-water penetration. They are available in1.25” flanged (flat or curved) frame which in turn is mechanically joined to give the highest rigidity and strength. Louvers can be supplied as optional with galvanized bird or aluminium insect screen, volume control damper and air filter of 1”, 2” or 4” thickness. The filters are accessable from the side or backward of the louver depending upon type of installation and must be specified by the customers. These louvers are available in standard given sizes however, they can be supplied in other requested sizes and architectural shapes upon customers requirements.

MATERIAL AND FINISHDFL-11H louvers are made of heavy gauge extruded aluminium profiles. They are available in white polyester powder coated finish or any other RAL standard colour upon customer’s request. Bird screens are made of galvanized expanded metal sheets, however dampers are made of extruded aluminium profiles.

Fresh Air Louver (DFL - 11H)

Fresh Air Louvers

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Octagonal Louver

PRODUCT CODE

Accessories:B :Bird screenD :Volume Control Damper (VCD)BD :Bird screen & VCD.I :Insect Screen.F1 :Aluminium Filter 1” thick.F2 :Aluminium Filter 2” thick.F4 :Aluminium Filter 4” thick.

DFL - 11H -W -H -C

Width in inch.

Height in inch.

Dasco Fresh Air Louvers

Use the code of DFL-11HFF to refer to Dasco fresh air louver with flat frame.

DFL - 11H - 16 - 20 - BD:Dasco fresh air intake louver size 16” x 20” with bird screen and volume control damper (VCD).

DFL - 11H - 40 - 20 - BDF2:Dasco fresh air intake louver size 40”x20” with bird screen, volume control damper (VCD) and 2” thick aluminium filter.

Example:

Note: Always specify the horizontal dimension first.

SPECIAL ARCHITECTURAL LOUVERS

Triangular Louver Arched Louver

Dimensional Data

DIMENSIONAL DATA

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DFL - 11H - F2 DFL - 11H - B

Dasco Fresh Air Louver with curved frame (DFL - 11H)

Dasco Fresh Air Louver with flat frame (DFL - 11HFF)

Definitions & Selection

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Is the air stream velocity measured at the face of a louver in FPM.Is the air flow rate in cubic feet per minute.Is in ft2 , and is related to the other parameters by the equation :CFM = Free Area x Face velocity = Ak x VkIs the sum of static pressure and velocity pressure given in inches W.G

From the pressure requirement table 1 it shows that a 400 FPM velocity results an exhaust pressure drop of 0.016 W.G.Determine the effective free area.

1)

2)

DEFINITIONS & SELECTION PROCEDURE

Effective free area Ak =CFM

Vk

DEFINITIONSFace velocityCFMEffective free area

Total pressure drop

:::

:

SELECTION PROCEDURE

Example:Louver size required for an exhaust requirements of 1600 CFM with a total pressure drop of 0.016” W.G.

=1600

400= 4.0 ft2

From table 2 the 4.0 ft2 effective free area is suitable for the following sizes: 28” x 54”, 48” x 30” ... etc.

3)

Note:For other louver sizes not shown in table 2. The approximate effective free area in square feet can be calculated by using the following formula:-

Effective free area (Ak) = (0.5H - 0.25) x (W-0.125)where, H is Height in ft and W is Width in ft.

Performance Data

PERFORMANCE DATA

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PRESSURE REQUIREMENT

EFFECTIVE FREE AREA

Table No. 1. Total pressure drop in inches of water as a function of face velocity in FPM for DFL-11H

Table No. 2. Effective free area in ft2 (Ak factor) for DFL-11H

Sand Louvers

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GENERAL

SAND LOUVERS

Dasco sand louver DSL-12H are architectural air inlets. They are widely used for building exteriors and are suitable for different HVAC and industrial applications to prevent sand entry. The blades are carefully designed to provide a low resistance to air flow and a high free area.

Sand Louver (DSL - 12H)

DESCRIPTIONDSL-12H louvers have 2 inch deep horizontal fixed blades designed carefully for low pressure drop and to prevent entry of sand. The frame is 1.25” wide (flat or curved) flanged type and is mechanically joined to give a rugged construction to the louver. These louvers are available as optional with galvanized bird screen, aluminum type air filter in 1”, 2” and 4” thickness and volume control damper. They are manufactured in a wide range of standard sizes however, they can be supplied in non-standard sizes, depths or architectural shapes to suit customers requirements.

MATERIAL AND FINISHDSL-12H sand louvers are made of heavy extruded aluminium profiles. They are available in white polyester powder coated finish or any other RAL standard colour upon customer’s request. Bird screens are made of galvanized expanded metal sheets

Sand Louver With Flat Frame(DSL - 12HFF)

Sand Louvers

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PRODUCT CODE

Accessories:B :Bird screenD :Volume Control Damper (VCD)BD :Bird screen & VCD.I :Insect Screen.F1 :Aluminium Filter 1” thick.F2 :Aluminium Filter 2” thick.F4 :Aluminium Filter 4” thick.

DSL - 12H -W -H -C

Width in inch.

Height in inch.

Dasco Sand Louver

Use the code of DSL-12HFF to refer to Dasco sand louver with flat frame.

DSL - 12H - 30 - 18 - B:Dasco Sand Louver - size 30” x 18” with bird screen.DSL - 12 H - 24 - 20 BDF1:Dasco Sand Louver - size 24” x 20” with bird screen, volume control damper and 1” thick aluminium filter.

•

•

Example:

A special assembly of sand louver with a bird screen, volume control damper and a wash--able aluminium filter. (All are enclosed in a galvanized box).

Example: DSL-12H - W - H - BDF2

Dimensional Data

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DIMENSIONAL DATA

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Dasco Sand Louver with curved frame - (DSL - 12H)

SELECTION PROCEDURE

To select a suitable size of a sand louver (DSL-12H) for a certain application, follow exactly the same procedure as been explained previously.

NoteFor louver sizes not shown in table 5. The approximate effective free area in square feet can be calculated by using the following formula:-

Effective free area (Ak) = (0.45 H-0.08) x (W-0.1)

Where, H is Height in ft and W is Width in ft.

Dasco Sand Louver with flat frame - (DSL - 12HFF)

Performance Data

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PERFORMANCE DATA

AVAILABLE STANDARD SIZES

Table No. 3 DSL-12H standard sizes available (HxW) in inches.


EFFECTIVE FREE AREA

Table No. 4 Intake pressure drop in inches of water as a function of face velocity in FPM for DSL-12H.

Table No. 5. Effective free area in ft2 (AK factor) for DSL-12H.

Sand Louvers (Heavy Duty)

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GENERAL

Dasco sand louvers DSLH-12H are considered as an architectural air inlets. They have wide deep heavy aluminium blades suitable to be used for building exteriors and are very efficient to prevent sand entry. They are used for different HVAC and industrial applications. Special blades are carefully designed to provide a low resistance to air flow and high free area.

Sand Louver - Heavy Duty Type With Filter(DSLH - 12H - F2)

SAND LOUVERS (HEAVY DUTY TYPE)

Sand Louver - Heavy Duty Type(DSLH - 12H)

DESCRIPTION

DSLH - 12H sand louvers have 4 inch deep horizontal fixed blades designed carefully for low pressure drop and to prevent entry of sand. The frame is 45 mm wide, 2mm thick and is mechanically joined to give a rugged construction to the louver. These louvers are available as optional with galvanized bird screen, aluminium type air filter in 1”, 2” and 4” thickness and volume control damper. They are manu--factured in a wide range of standard sizes however, they can be supplied in non-standard sizes, depths or architectural shapes to suit customers requirements.


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DSLH-12H sand louvers are made of an extra heavy extruded aluminium profiles. They are available in white polyester powder coated finish or any other RAL standard colour upon customer’s request. Bird screens are made of galvanized expended metal sheets.

MATERIAL AND FINISH

PRODUCT CODE

Accessories:B:Bird screenD :Volume Control Damper (VCD)BD :Bird screen & VCD.I :Insect Screen.F1 :Aluminium Filter 1” thick.F2 :Aluminium Filter 2” thick.F4 :Aluminium Filter 4” thick.

DSL - 12H -W -H -C

Width in inch.

Height in inch.

Dasco Sand Louver Heavy Duty type

Use the code of DSLH-12HFF to refer to Dasco sand louver with flat frame.


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DSL - 12H - 40 - 24 - B:

Dasco Sand Louver Heavy duty type - size 40” x 24” with bird screen.

DSL - 12 H - 30 - 24 BDF2:

Dasco Sand Louver Heavy duty type - size 24” x 20” with bird screen, volume control damper

and 2” thick aluminium filter.

•

•

Example:

A special assembly of Dasco sand louver - heavy duty type - with a bird screen, volume control

damper and a washable aluminium filter. (All are enclosed in a galvanized box).

Model: DSLH - 12H - W - H - BDF2

DSLH - 12H-W-H-BDF2 (Back View)

Dimensional Data

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To Select a suitable size of a sand louver (DSLH-12H) for a certain application, follow exactly the same procedure as been explained previously.

DIMENSIONAL DATA

Dasco Sand Louver (Extruded Aluminium)

Bird Screen (Galvanized)

Volume Control Damper(Galvanized) with side quadrant (manual type)

2” Thick Aluminium wash--able filter removable from the side.

1.

2.

3.

4.

SELECTION PROCEDURE

Dasco Sand Louver - heavy duty type DSLH-12H

NoteFor louver sizes not shown in table 8. The approximate effective free area in square feet can be calculated by using the following formula:Effective free area (Ak) = (0.55H - 0.76) x (W - 0.27)Where, H is Height in ft and W is Width in ft.

DSL - 12HDSLH - 12H

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PERFORMANCE DATA

Performance Data

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Table No. 6 DSLH-12H standard sizes available (HxW) in inches.



EFFECTIVE FREE AREA

Table No. 7 Intake pressure drop in inches of water as a function of face velocity in FPM for DSLH-12H.

Table No. 8. Effective free area in ft2 (Ak factor) for DSLH-12H.

Sand Trap Louvers

GENERAL

Dasco sand trap louvers DSL-8X are designed for fresh air intake applications to separate air-borne sand and dust from the stream of air. They are provided with a self emptying sand drain holes at the base. Blades are also arranged in a way to provide a low resistance to air flow and a high free area.

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SAND TRAP LOUVERS

Sand Trap Louver (DSL - 8AL)

DESCRIPTION

DSL-8X sand trap louvers are manufactured from extruded aluminium profiles as standard and are available in a wide range of sizes for all intake capacities. Blades are of 4” deep aluminium profiles as standard. However, other blade depths are also available upon customer’s request (1.5”, 1.75” and 2”). The frame is 3” wide and is perfectly joined to give a rugged construction to the louver. Smaller 2” width frames are also available. Another optional sand trap louvers are completely con--structed from galvanized steel. Galvanized bird screens are also available as accessories.

MATERIAL AND FINISH

DSL-8X sand trap louvers are made of heavy gauge extruded aluminium profiles. They are available in white polyester powder coated fin--ish or any other RAL standard colour upon customer’s request.Galvanized steel sand trap louvers are also available as optional with:-Frames : 18 gaugeBlades : 20 gauge DSL - 8AL (2” Width Frame)

Sand Trap Louvers

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Dasco Sand Trap Louver (DSL - 8AL)

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PRODUCT CODE

ACCESSORIES:B :Galvanized Bird Screen.D :Volume Control Damper (VCD)BD :Bird screen & VCD.I :Insect Screen.F1 :Aluminium Filter 1” thick.F2 :Aluminium Filter 2” thick.F4 :Aluminium Filter 4” thick.

DSL - 8X - W - H - CDasco Sand Trap louver

MATERIAL :AL: Aluminium constructionGL: Galvanized construction

Width in inch.

Height in inch.

DSL - 8AL - 24 - 24 - B:

Dasco Aluminium Sand Trap Louver size 24” x 24” with bird screen.

DSL - 8GL - 18 - 30 - BF2:

Dasco Galvanized Sand Trap Louver size 18” x 30” with bird screen and 2” thick aluminium

filter.

•

•

Example:

DIMENSIONAL DATA

Performance Data

PERFORMANCE DATA

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Pressure Requirement

DSL - 8AL

EFFECTIVE FREE AREA

Table No. 9 Total pressure drop in inches of water as a function of face velocity in FPM for DSL-8X.

Table No. 10. Effective free area in ft2 (Ak factor) for DSL-8X

GENERAL

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ACOUSTIC LOUVERS

Acoustic Louvers

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Galvanized Steel Sheet, Gauge #: 18 (1.31 mmthick)The Baffles are inclined at 40˚ and resistance to water ingress with acoustic properties. Made from insulating material (1” thick x 16 Kg/m2 Fiberglass) which is inert, incombustible and non-hygroscopic. They are covered on the underside with a perforated G.I. sheet, Gauge #: 22 (0.85mm thick).Galvanized Steel Sheet, Gauge #: 22 (0.85 mm thick)Expanded Galvanized Steel Sheet, Gauge #: 22 (0.85 mm thick) as standard.

:

:

:

:

STANDARD CONSTRUCTIONFrame

Baffles

Blade

Wire Mesh

Dasco Acoust ic Louvers DACL - 20H are designed for sound attenuation and for air intake or extract to atmosphere for air-conditioning plants, enclosed car parking areas, electrical / diesel generating plants, etc.

Acoustic Louver (DACL - 20H)

Acoustic Louver Section(Back View)

White colour for frame & blades as standard. Painted under Electrostatic Polyester Powder Coated System. Other colours are available upon request.

:Finish

NoteThe Acoustic Louvers are made in one section up to 1,200mm x 2,100mm. Any larger sizes are manufactured in sections for assembly at site.

Acoustic Louvers

Table No. 11. DACL-20H standard sizes available (HxW) in inches.

PRODUCT CODE

ACCESSORIES:B :Bird Screen.FINISH G :GalvanizedP :Powder Coated

DACL-20H-W - H - CDasco Sand Acoustic Louver

Width in inch.

Height in inch.

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DIMENSIONAL DATA

Acoustic Louver (DACL - 20H)

GENERAL

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PRESSURE RELIEF LOUVERS - GRAVITY SHUTTERS

Pressure Relief Louvers

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Dasco pressure relief louvers DPRL-33 are

widely used to maintain constant level of

pressure inside pressurized rooms by relieving

excess air when it exceeds the desired limits.

The blades are designed and positioned in such

a way to permit automatic lifting to relieve the

pressure in the room and then to drop back to

the closed position by gravity when the room

pressure is normalized. DPRL-33 louvers can

also be used at duct terminations to prevent

backdrafts when air moving devices (fans) are

switched off.

They are generally installed at exhaust ducts in

painting plants, diesel generator rooms,

ventilation systems and kitchen hoods.

Pressure Relief Louver (DPRL - 33)

DESCRIPTIONDasco pressure relief louvers-gravity shutters - (DPRL-33) are made of light weight horizontal pivoted blades, so designed to seal air leakages when closed and to reduce noise generation when opened. The frame is a flanged rugged type (curved or flat) 1.25” wide.They are available in standard sizes and are also manufactured (as optional) in non-standard sizes upon customers requirements.Galvanized bird screen are also provided as accessories.

Pressure Relief Louvers

DPRL - 33 (totally closed)

PRODUCT CODE

ACCESSORIES:B :Galvanized Bird Screen.D :Volume Control Damper (VCD)

DPRL - 33 - W - H - CDasco Pressure Relief Louver

Width in inch.

Height in inch.

DPRL - 33 - 24 - 30 - B:DASCO pressure relief louver size 24”x30” with bird screen.

Example:

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MATERIAL AND FINISH

DASCO pressure relief louvers DPRL-33 are made of extruded aluminium profiles. They are available in white polyester powder coated finish or any other RAL standard colour upon customer’s request. Bird screens are made of galvanized expanded metal sheets.

DPRL - 33 (100% opened blades)

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DIMENSIONAL DATA

Dimensional Data

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DPRL - 33 (100% opened blades)

:

Dasco Pressure Relief Louver - gravity shutter (DPRL - 33)

Table No. 12 DPRL-33 standard sizes available (HxW) in inches.

DPRL - 33 (totally closed)

Definitions & Selection

Is the air stream velocity measured at the face of a louver in FPM.Is the air flow rate in cubic feet per minute.Is in ft2 , and is related to the other parameters by the equation :CFM = Free Area x Face velocity = Ak x VkIs the sum of static pressure and velocity pressure given in inches W.G

From the pressure requirement table 13 it shows that a 500 FPM velocity results an exhaust pressure drop of 0.13” W.G.Determine the effective free area.

1)

2)

DEFINITIONS & SELECTION PROCEDURE


Vk

DEFINITIONSFace velocityCFMEffective free area

Total pressure drop

:::

:

SELECTION PROCEDURE


=1250

500= 2.5 ft2

From table 14 the 2.5 ft2 effective free area is suitable for the following sizes: 32” x 14”, 28” x 16” ... etc.

3)

Note:For other louver sizes not shown in table 14, the approximate effective free area in square feet can be calculated by using the following formula:-

Effective free area (Ak) = (0.9H - 0.05) x (W-0.1) (100% open blades) where, H is Height in ft and W is Width in ft.

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PERFORMANCE DATA

Performance Data

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DPRL-33 (special circular shape)DPRL-33

Table No. 13 Exhaust pressure drop in inches of water as a function of face velocity in FPM for DPRL-33.(Values are for 100% opened blades)

EFFECTIVE FREE AREA

Table No. 14. Effective free area in ft2 (Ak factor) for DPRL-33. (Values are for 100% opened blades)

Penthouse Louvers

Dasco penthouse louvers DPHL - 13H are considered as typical louver units for both air intake and exhaust applications.They are designed and built to become a permanent part of the building. They maintain their pleasant appearance and effective weather protection as a result of their rugged, durable, extruded aluminium construction and careful workmanship. They are usually furnished with either mullion or mitered corners and incorporate the normal Dasco fresh air louver blades DFL-11H as standard. However, any other type of Dasco louver blades can also be used as optional.

PENTHOUSE LOUVERS

GENERAL

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DPHL - 13H penthouse louvers have as a standard 2” deep fixed horizontal blades. The blades are carefully designed to get low pressure drop, maximum free area and to prevent rain-water penetration. They are available in 1.25” flanged frame and are built and mounted to an internal framing with mullion corners. The integral framing mullion structures are furnished with a standard 1.6” x 1.6” extruded aluminium profiles. For the other mitered corners type penthouse louvers, blades are beveled and welded internally at the end. The top of the penthouses are covered with flat or pitched roofs of aluminium sheets. All of the four louver sides are of removable type for easy maintenance purposes. Penthouse louvers can also be supplied as optional with galvanized bird or insect screens and / or aluminium washable air filters of 1”, 2”, or 4” thickness.

DESCRIPTION

Penthouse Louver (DPHL - 13H)With Mullion Corner

Penthouse Louvers (DPHL - 13H)With Mitered Corner

Penthouse Louvers

PRODUCT CODE

ACCESSORIES:B : Bird ScreenI :Insect ScreenF :Aluminium Filter 1” thick.F2 :Aluminium Filter 2” thick.F4 :Aluminium Filter 4” thick.

DPHL-13H - W - L - H - CDASCO Penthouse Louver

Width in inch.

Length in inch.

Height in inch.

DPHL-13H - 18 - 18 - 24 - B:Dasco penthouse louver with 18” x 18” basementsize, 24” height and bird screen.

DPHL - 13H - 24 - 18 - 36 - BF2:Dasco penthouse louver with 24” x 18” basementsize, 36” height, bird screen and 2” thick aluminium air filter.

Example:

MATERIAL AND FINISH

DPHL - 13H penthouse louvers are made of heavy gauge extruded aluminium profiles. They are available in white polyester powder coated finish or any other RAL standard colour upon customer’s request. Structural mullion corners are of strong aluminium profiles while roof tops are of aluminium sheets as a standard. However, galvanized roofs are also available upon request.Bird screens are made of galvanized expanded metal sheets.

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Definitions

DEFINITIONS

DEFINITIONS

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DPHL - 13H - F2

Is the air stream velocity measured at the face of a louver in FPM

and it corresponds to the effective free area.

Is the air flow rate in cubic feet per minute.

Is in ft2 , and is related to the other parameters by the equation :

CFM = Free Area x Face velocity

= Ak x Vk

Is the inside basement perimeter in feet and is calculated from:

P= 2W + 2L, W and L are the horizontal dimensions of the penthouse

louver.

Is the sum of static pressure and velocity pressure given in inches W.G

Face velocity

CFM

Effective free area

Penthouse louver perimeter

Total pressure drop

:

:

:

:

:

Dimensional Data

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DIMENSIONAL DATA

DPHL - 13H (with mullion corners)

DPHL - 13H (with mitered corners)

Selection Procedure

From the pressure requirement table 15 it shows that an 800 FPM velocity results an exhaust pressure drop of 0.1” W.G.Determine the effective free area:

1)

2)

SELECTION PROCEDURE


Vk


Example:Select a penthouse louver for an exhaust requirements of 3300 CFM with a total pressure drop of 0.1” W.G.

=3300

800= 4.125 ft2

From table 16 the 4.125 ft2 effective free area is suitable for the following penthouse louver’s sizes:• P = 5 ft, H = 28 inch. Could be suitable for a penthouse basement dimensions of (WxL) - 12” x 18”.• P = 6 ft, H = 24 inch.

3)

Note:For the penthouse louver sizes not shown in table 16. The approximate effective free area in square feet can be calculated by using the following formula.:-

Effective free area (Ak) = (H-0.5) x (0.5P-0.25)Where, H is height in ft and P is Inside Perimeter in ft.

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Could be suitable for a penthouse basement dimensions of (WxL) - 12”x24” or 18” x 18” depending on the duct size.

Table No. 15 Pressure drop in inches of water as a function of face velocitythrough the free area in FPM for DPHL-13H.

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PERFORMANCE DATA

Performance Data

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Tabl

e N

o. 1

6. E

ffect

ive

free

area

in ft

2 (A

k Fa

ctor

) for

DPH

L - 1

3H

Sightproof Louvers

GENERAL

Dasco sightproof louvers DSPL-16H are mainly designed to protect air intake and exhaust openings in building exterior walls. They are considered as an architectural air inlets and outlets with a remarkable continuous horizontal appearance make them preferred by most architects. The blades are carefully designed to provide high free area, maximum resistance to rain and extreme weather conditions with minimum resistance to airflow.

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SIGHTPROOF LOUVERS

Sightproof Louver (DSPL - 16H)

DESCRIPTION

DSPL-16H louvers have 3 inch deep heavy gauge horizontal blades of 2 mm thick aluminium extruded profiles. They are carefully designed to get low pressure drop, maximum free area and to prevent rain water penetration by diverting water along blade troughs. They are available in 1.6” flanged curved frame of heavy gauge aluminium profile which in turn is mechanically joined to give the heighest rigidity and strength. Louvers can be supplied as optional with galvanized bird or aluminium insect screen, volume control damper and aluminium air filter of 1”, 2” or 4” thickness. The filters are accessable from the side or backward of the louver depending upon type of installation and must be specified by the customer. These louvers are available in standard given sizes, however they can also be supplied in other requested sizes and architectural shapes upon customers requirements.

MATERIAL AND FINISH

DSPL-16H louver are made of heavy gauge extruded aluminium profiles of 2 mm thickness. They are available in white polyester powder coated finish or any other RAL standard colour upon customer’s request. Bird screens are made of galvanized expanded metal sheets.

Sightproof Louvers

PRODUCT CODE

ACCESSORIES:B : Bird ScreenD :Volume Control Damper (VCD)BD :Bird screen & VCD.I :Insect ScreenF1 :Aluminium Filter 1” thick.F2 :Aluminium Filter 2” thick.F3 :Aluminium Filter 4” thick.

DSPL - 16H - W - H - CDasco Sightproof Louver

Width in inch.

Height in inch.

DSPL - 16H - 24 - 30 - B:Dasco sightproof louver size 24” x 30” withbird screen.

DSPL - 16H - 18 - 36 - BDF2DASCO sightproof louver size 18” x 36” withbird screen, volume control damper (VCD) and2” thick aluminium filter.

Example:

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DIMENSIONAL DATA

Dasco Sightproof Louver DSPL - 16H

•

•

Selection Procedure

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SELECTION PROCEDURE

From the pressure requirement table 18 it shows that a 550 FPM velocity results an exhaust pressure drop of 0.08” W.G. (Approximately).Determine the effective free area.

1)

2)


Vk


=2200

550= 4.0 ft2

From table 19 the 4.0 ft2 effective area is mostly suitable for the size 60” x 30”.3)


Effective free area (Ak) = (0.36H-0.13) x (W-0.05)Where, H is Height in ft and W is Width in ft.


Table No. 17 DSPL-16H standard sizes available (HxW) in inches.

Performance Data


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PERFORMANCE DATA

Table No. 18 Total pressure drop in inches of water as a function of face velocity in FPM for DSPL-16H.

EFFECTIVE FREE AREA

DSPL - 16H(Cross Section)

DSPL - 16H

Table No. 19. Effective free area in ft2 (Ak factor) for DSPL-16H.

Drainable Louvers

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STATIONARY DRAINABLE LOUVERS

Dasco stationary drainable louvers DSDL-18H are considered as high performance louvers de s i gned fo r bo th i n t ake and exhaus t applications. The unique configuration of the louver blades gives them a remarkable drainable effect. These louvers are the most efficient in minimizing water penetration. They are carefully designed to provide high free area, maximum resistance to rain with minimum resistance to airflow.

GENERAL

Stationary Drainable Louver(DSDL - 18H)

DSDL-18H louvers have 3 inch deep heavy gauge horizontal blades of 2 mm thick aluminium extruded profile. They are carefully designed to get low pressure drop, maximum free area and to prevent rain water penetration with a high performance drainable effect.They are available in 1.6” flanged curved frame of heavy gauge aluminium extruded profile which in turn is mechanically joined to give the highest rigidity and strength. Louvers can be supplied with galvanized bird or aluminium insect screen, volume control damper and aluminium air filter of 1”, 2” or 4” thickness. The filters are accessable from the side or backward of the louver depending upon type of installation and must be specified by the customer. These louvers are available in standard given sizes, however they can also be supplied in other requested sizes and architectural shapes upon customers requirements.

DESCRIPTION

DSDL - 18H louvers are made of heavy gauge extruded aluminium profiles of 2 mm thickness. They are available in white polyester powder coated finish or any other RAL standard colour upon customer’s request. Bird screens are made of galvanized expanded metal sheets.

MATERIAL AND FINISH

Drainable Louvers

PRODUCT CODE


DSPL - 18H - W - H - CDasco Stationary Drainable Louver

Width in inch.

Height in inch.

DSDL - 18H - 30 - 36 - B:DASCO stationary drainable louver size30” x 36 with bird screen.

DSDL - 18H - 18 - 36 - BDF1:DASCO stationary drainable louver size 18” x 36”with bird screen, volume control damper (VCD)and 1” thick aluminium filter.

Example:

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DIMENSIONAL DATA

Dasco Stationary Drainable Louver(DSDL - 18H)

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Selection Procedure

From the pressure requirement table 21 it shows that a 500 FPM velocity results an exhaust pressure drop of 0.04” W.G.Determine the effective free area:

1)

2)

SELECTION PROCEDURE


Vk



=500

500= 1.0 ft2

From table 22 the 1.0 ft2 effective area is mostly suitable for the size: 18” x 24”, 12” x 48” ...etc.3)



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Table No. 20 DSDL-18H standard sizes available (HxW) in inches.

Performance Data


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PERFORMANCE DATA

Table No. 21 Total pressure drop in inches of water as a function of face velocity in FPM for DSDL-18H.

EFFECTIVE FREE AREA

Table No. 22. Effective free area in ft2 (Ak factor) for DSDL-18H.

DSDL - 18H(Cross section)

DSDL - 18H

Stormproof Louvers

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STATIONARY STORMPROOF LOUVERS

Dasco stationary stormproof louvers DSSL-19H are mainly designed to protect air intake and exhaust openings in building exterior walls and are recommended for applications where low water penetration is required. They are carefully designed to provide high free area, maximum resistance to rain and extreme weather conditions with minimum resistance to airflow.

GENERAL

DSSL - 19H louvers have heavy gauge horizontal blades of 1.8 mm thick aluminium extruded profile. They are carefully designed to get low pressure drop, maximum free area and to prevent rain water penetration with high efficiency to extreme weather conditions.They are available in 1.6” flanged curved frame of heavy gauge aluminium extruded profile which in turn is mechanically joined to give the highest rigidity and strength. Louvers can be supplied with galvanized bird or aluminium insect screen, volume control damper and aluminium air filter of 1”, 2” and 4” thickness. The filters are accessable from the side or backward of the louver depending upon type of installation and must be specified by the customer.These louvers are available in standard given sizes, however they can also be supplied in other requested sizes and architectural shapes upon customers requirements.

DESCRIPTION

DSSL - 19H louvers are made of heavy gauge extruded aluminium profiles. They are available in white polyester powder coated finish or any other RAL standard colour upon customer’s request.

Bird screens are made of galvanized expanded metal sheets.

MATERIAL AND FINISH

Stationary Stormproof Louver(DSSL - 19H)

Stormproof Louvers

PRODUCT CODE


DSSL - 19H - W - H - CDasco Stationary Stormproof Louver

Width in inch.

Height in inch.

DSSL -19H - 24 - 36 - BF1:DASCO stormproof louver size 24” x 36” with bird screen and I” thick aluminium filter.

DSSL - 19H - 48 - 48 - BDF2DASCO stormproof louver size 48”x48” with birdscreen, volume control damper (VCD) and 2” thickaluminium filter.

Example:

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DIMENSIONAL DATA

Dasco Stationary Stormproof Louver DSSL - 19H

•

•

Selection Procedure

From the pressure requirement table 24 it shows that a 600 FPM velocity results an exhaust pressure drop of 0.07” W.G.Determine the effective free area:

1)

2)

SELECTION PROCEDURE


Vk



=1200

600= 2.0 ft2

From table 25 the 2.0 ft2 effective area is mostly suitable for the size 42” x 18”.3)



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Table No. 23 DSSL-19H standard sizes available (HxW) in inches.

Performance Data


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PERFORMANCE DATA

Table No. 24 Total pressure drop in inches of water as a function of face velocity in FPM for DSSL-19H.

EFFECTIVE FREE AREA

Table No. 25. Effective free area in ft2 (Ak factor) for DSSL-19H.

DSSL - 19H(Cross section)

DSSL - 19H

Different samples from DASCO air terminal devices (Louvers) were tested at ITS (Intertek Testing Services) labs in accordance with:

TESTING AND APPROVAL

Testing & Approval

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Air diffusion council test code for grilles, registers and diffusers No. ADC 1062: GRD-84.ISO 5219 “Air distribution and air diffusion laboratory aerodynamic testing and rating of air terminal devices”.ANSI/ASHRAE 70-1991, “Method of testing for rating the performance of air outlets and inlets”.

•

•

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TESTING AND APPROVAL

LOUVERS WERE TESTED FOR:

Static pressure in inches W.G.Ak (Area factor).

a.b.

DASCO offers a first class service by introducing a wide range of perfect polyester powder coating on all of its aluminium products of air terminal devices.The best quality of polyester powder Corro-Coat are used in according to the international standards (BS,ISO,DIN,ASTM). PE-F architectural grade polyester powders are used perfectly with pre-treatment, electrostatic spray and curing in accordance with the above standards recommendations. A complete range of RAL-Standard colours are always available in addition to a vast range of special compound colours as per our customers request.

COATING WITH POWDERCOATING WITH POWDER

NOW YOU CAN ACHIEVE OPTIMAL COATING PERFORMANCEON ALL PRODUCTS YOU PAINT!

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RAL Standard Colour Chart Swatch

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Now producing relief knots as in natural wood

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New Technology ExcellenceResistance to high radiation and extreme climatic conditions.It can be used in painting elaborate geometrical shapes producing perfect quality and aesthetic results.It is the only technology that can replace wood in traditional areas.

1.2.

3.

New Mahogany - 21

New Mahogany - 22

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Notes

Since 1962

P.O. Box: 6192 Hawalli 32036 Kuwait.Tel: +965 4839911 Fax: +965 4815498

www.dasco.com.kw Prod

uct B

ulle

tin 1

36-D

dasco louvers

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