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
[pic]
|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
[pic]
[pic]
TRANSVERSE JOINT
[pic]
OTHER ACCESSORIES TECHNICAL DETAILS
ACCESS DOOR :
[pic]
|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
[pic] [pic]
|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 :
[pic] [pic]
|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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