GULF HVAC DUCTS TECHNICAL CATALOGUE



TECHNICAL SUBMITTAL - GI DUCTS

COMPARITIVE TABLE OF GI SHEET THICKNESS

| |USG |BWG |BG |

|Gauge No. | | | |

| |mm |In. |mm |In. |mm |In. |

| | | | | | | |

|18 |1.170 |.0600 |1.240 |.0490 | 1.257 |.0496 |

|19 |1.141 |.0458 |1.070 |.0420 | 1.118 |.0440 |

|20 |0.452 |.0375 |0.890 |.0350 | 0.996 |.0392 |

|21 |0.373 |.0364 |0.810 |.0320 |0.886 |.0349 |

|22 |0.794 |.0313 |0.710 |.0280 |0.794 |.0313 |

|23 |0.714 |.0283 |0.640 |.0250 |0.707 |.0278 |

|24 |0.636 |.0250 |0.560 |.0220 |0.629 |.0248 |

|25 |0.667 |.0219 |0.510 |.0200 |0.560 |.0220 |

|26 |0.476 |.0138 |0.460 |.0180 |0.498 |.0196 |

|27 |0.437 |.0172 |0.410 |.0160 |0.443 |.0176 |

|28 |0.397 |.0166 |0.360 |.0140 |0.397 |.0156 |

GI RECTANGULAR DUCTS

| |

Ducts are manufactured as per : DW142, DW144, SMACNA, ASHRAE

GI SHEET :

GI Sheets will be Hot dipped galvanized sheet of lock forming quality and always confirms ASTM A653 or equivalent having a minimum zinc coating of G90

SHEET BRANDS :

JINDAL-INDIA, NIPPON-JAPAN, AGIS-UAE

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|SHEET METAL STANDARDS |

|DUCT GUAGE AND ENFORCING FOR 4 FEET TRANSVERSE JOINT REINFORCEMENT |

|  |DUCT PRESSURE WG |  |

|DUCT DIMENSION INCH |1'' |2'' |3'' |4'' |6'' |10'' |

|2. Cleat length should be min 6'' | |

|3. Distance between ends of two cleats or distance between cleat and corner bolt should not be more than 6'' for | |

|pressure class 3'' and above | |

|4. Distance between ends of two cleats or distance between cleat and corner bolt should not be more than 10'' for | |

|pressure class less than 3'' | |

|5. e.g. if the duct width length is 22'' or less, one cleat with 10'' length in the middle can be used to reduce | |

|overall length of cleat (for pressure class 3'' and above) | |

RECTANGULAR DUCTS & FITTINGS LIST :

Straight Duct

Short Length Duct

Degree Elbows

Taper / Reducer

Side Branch / Y Branch

Offset

Take off / Rectangular Neck

Round/Dropper Neck

End Cover/Cap

Square to Round / Transition piece

Tee Piece

Linear Boxes

Plenum Boxes

Volume Control Dampers

Access Door

Sand Trap Louver

Duct Canvas Connector

Duct Wire mesh

GI Hood / Canopy

LONGITUDINAL JOINT

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TRANSVERSE JOINT

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OTHER ACCESSORIES TECHNICAL DETAILS

ACCESS DOOR :

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|GENERAL |Access Doors are designed to provide a practical and inexpensive access to components inside the duct work. |

| |Recommended for use in low to medium pressure duct systems. |

|MATERIAL |DOOR PANEL & DOOR FRAME |: |Made of Hot-dipped Galvanised Steel (Lockforming quality) |

| | | |with coating designation of G 90 as per standard |

| | | |specification ASTM A527. |

| |CAMLOCK |: |Plated Steel |

| | | |Manufacturer: CAIN Manufacturing Co., USA |

| |HINGE |: |Continuous piano style |

| | |

| | |

|CONSTRUCTIONAL |The door panel is internally insulated with fiberglass insulation of 25mm thickness; 24 Kg/m³ density and |

|DETAILS |compressible type foam gasket is provided all around the door frame. |

| | |Notes: *Hinge is furnished on height dimension & other sizes available on request. |

VCD - MANUAL VOLUME CONTROL DAMPER

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|MATERIAL | | |The Manual Volume Control Damper is manufactured from galvanized steel sheets. Confirming to |

| | | |ASTM A 527 G90 coating. |

|SMACNA | | |Its body is mode out of gauge 18G/20G. |

|STANDARD | | | |

|CONSTRUCTION | | |Its blades are from 18G/20G Gauge G.S. sheet, mounted on bronze bushes and operated by shaft of |

| | | |dia with the help of a continuous linkage which allows the damper to open and close. |

| | | | |

| | | |The quadrant is fixed on the above shaft to operate & adjust the damper. |

| | | | | |

| | | | | |

| | | | | |

LINEAR / PLENUM BOXES :

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|GENERAL |A plenum / Linear is an air-distribution box either attached directly to the supply outlet of the HVAC equipment |

| |or ducts that helps to keep the building in comfortable temperature. |

| |MATERIAL |: |Made of Hot-dipped Galvanised Steel (Lockforming quality) |

| | | |with coating designation of G 90 as per standard |

| | | |specification ASTM A527. |

| |CONNECTION |: |GI Ring / Collar with groove to connect with Duct. |

| | | |Square Collar to connect with Grills & Diffusers. |

| | |

|CONSTRUCTION: |Linear boxes can be internally insulated with fiberglass insulation of 25mm thickness; 24 Kg/m³ density or |

| |non-insulated. |

| | | |

SAND TRAP LOUVERS :

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|GENERAL |The sand trap louver is used at the fresh air inlet duct of the air handling unit. It can lower the dust loading |

| |of conventional filtration as it is designed to separate large size sand particles at low to medium speeds. |

| |MATERIAL |: |Made of Hot-dipped Galvanised Steel (Lockforming quality) |

| | | |with coating designation of G 90 as per standard |

| | | |specification ASTM A527. |

| | |

|CONSTRUCTION: |The vertically arranged blade sections and holes for sand drainage ensure that the sand trap louver is self |

| |cleaning. Fabricated fully with Rivets & self locks. |

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Benair Air-conditioning –Duct Manufacturing Division produces wide range of GI Ducts and accessories in accordance with SMACNA, ASHRAE & DW144 standards. The sheets will be Hot dipped galvanized sheet of lock forming quality from various brands like Nippon, Jindal, AGIS, etc.

TECHNICAL SUBMITTAL

[- GI Ducts & Accessories]

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