THE VENTILATION ENGINEERS

DUSTECH

DUSTECH DUCT CO. (P) LTD.

DUSTECH

DUSTECH

About :-DUSTECH fabricated in accordance with 2005 'SMACNA' standards, ASHRAE standards or as per consultants specifications.

Rectangular duct work has been the main type of duct work in history of HVAC. It is still used today on a greater percentage of commercial projects over any other type. Commercial duct systems rectangular duct and fitting is your 'High Quality' choice for commercial construction jobs. Every piece we manufacture meets or exceeds standards and project requirements, including Leeds and GREEN CONSTRUCTION STANDARDS.

DUSTECH is in fabrication of SPIRAL, OVAL & RECTANGULAR DUCTS & duct products in galvanized iron steel, aluminium, stainless steel, mild steel, fire rated ducting, linear acoustic insullation and alluminium clading with an option of painting & powder coating.

We build and install various types of liner and inner walls including solid inner wall, perforated inner wall with glass wood, nitrile and sound attenuating cores.

Dedicated and experienced team of more than 80 people consists of skilled and semi skilled associates.

Experienced team of engineers and autocad draughtsman ensure your job requirements and provide solution to consultants specification.

Production is taken care round the clock for quick deliveries as per the site timings and requirement.

Specially designed soft ware integrating the tagging of the drawing to dispatch the material flowlessly.

Readily available stock of galvanized. Iron steel coil/sheet ensures timely supply of ducts at the project site.

Your order ship standard with slip cleat, TDF Corner, Nut Bolt & Gaskets.

Rectangular Duct

‘DUSTECH' Rectangular duct and fitting are factory fabricated to furnish with a high quality line

of products in a broad range of standard size, to minimize field – assembly/fabrication cost.

Rectangular duct is supplied in lengths upto 4 feet.

Longitudinal seams are typically made with Pittsburgh lock in transverse joint S&C cleat joint,

four – bolt connectors are available.

DUSTECH – Rectangular duct work can be shipped completely assembled or knock down in 'L'

shape. 'DUSTECH' standard rectangular products are fabricated to meet SMACNA, ASHRAE

duct connection/fabrication standards. We can also custom fabricate rectangular duct work for

commercial and industrial application according to consultant specification.

DUCTPRESSURE CLASS (in. wg)

Positive or NegativeDIMENSION

(mm)½ 1 2 3 4 6 10

200 26 26 26 24 24 24 22

201–250 26 26 26 24 22 20 18

251–300 26 26 24 22 20 18 16

301–350 26 24 22 20 18 18

351–400 26 22 20 18 18 16

401–450

26

22

20

18

16

451–500

24

20

18

16

501–550

22

18

16

16

551–600

22

18

16

16

601–650

20

18

REINFORCEMENT IS

REQUIRED651–700

18

16

701–750

18

16

751–900

16

Duct Gage 26 to 22 20 18 16

Minimum Flat Slip and Drive Gage

24 22 20 18

This table gives minimum duct wall

thickness (gage) for use of flat type

joint systems. Plain S and h e m m ed

as connectors are limited to 2 in. wg

maximum. Slips and drives must not be

less than two gages lighter than the duct

wall nor below 24 gage. Double S slips

must be 24 gage for ducts 30 in. (762

mm) wide or less and 22 g a g e for

greater width.

Duct Assembly Arrangement

Apply sealent over the corner if

small gap occur at the center of the

Duct and TDF Flange. Place on prepared

Flange together and ensure the

alignment by inserting the carrage bolt

and then Duct need to be clamped by

the standard Dustech cleats at every

interval of 6” as shown in the figure

with the help of Dustech brouch tool.

Ensure not to use hammer for

installation of cleat which may caused

damage to the Duct.

To install the TDF Corner, hook first leg of Corner

under flange. Snap the second leg of TDF Corner into

place on the duct flange using hammer.

The Corner may also be installed by setting the

duct upon its End so the flanges are flat against a floor,

and then tapping the Corner into place with a hammer.

The floor supports the flange prevant damage by the

procedure.

The prepration is required on only one end of

each Duct to be joined. Fix the continious length of

Gasket on the center of the TDF Flange on all four side.

Spiral DuctDUSTECH has been the leading manufacturer of spiral duct and associated fittings. Our commitment to excellence also extended our leading after sales services and supply program's 'FOR ORDERING TO ON GOING SUPPORT: “DUSTECH” specializes in HVAC and dust extraction systems. We at Dustech master the science of air management with the experience of understanding of practical applications, ensure the Project is error free, on time and in budget. We look forward to work with your organization. Thanks for considering “Dustech Duct Company (P) Ltd on your next project.

DUSTECH SPIRAL DUCT can be used in various field such

·As high and low velocity air handling

·General ventilation

·Warm air heating

·Sound absorber

·Weather proof jacketing of pipeline

·Column formers

·Drainage /irrigation

·Display props

·Conveyor

·Culvet

· Well casing

·Pier liners

Dust extraction

Fume extraction

·Air conditioning

·Tunnel/mine ventilation

·Void / spon tubling

Advantage of DUSTECH spiral duct Available In(28 SWG-18SWG)

Duct Fittings

·Energy efficient

·Easy & fast installation.

·More straightly per square meter

·Low noise level

·Maintenance friendly

·Modification and extraction is easy

·Low friction losses

·Machine made so less leakages

·Need less handling arrangement

·Light in weight

·Low project cost

·No accommodation of dust and foreign

material in corner being smooth surface.

·Can be exposed for good a static

·Used less raw material

Galvano (pb free)Galvanized SteelStainless steelAluminiumMiled Steel

All Accessories bends, elbow,reducer, offset, endcaps & Tee pieceetc are manufactured at high speedmodify with accurate diemension

DUSTECH Spiral DuctINSTALLATION INSTRUCTION

Spiral pipe must be cut at straight right angle and deburred.Make sure the spiral pipe or large end fitting is pushed all the way in and up to thegroove of the small end fitting.Secure the slip connection together by using 1/8” sheet metal screws or rivets.Place the screw or rivets 1”-1½” from the edge of the duct or the large end fitting toavoid cutting the gasket.

FF

FF

Coupling Arrangement

SIZE AND WALL THICKNESS CHART

102127152178203229254279305330356381406

Nom.mm Inches

Nom.mm Inches

Nom.mm Inches

456789

10111213141516

432457483508533559584610660711762813864

17181920212223242628303234

91496510161057111811681219127013211372140015001600

36384042444648505254555963

Wall thickness for diameters (other diameters and thickness upon request)

0.6 mm 0.8 mm 1.0 mm 1.2 mm

Oval Ducting and PipingDustech Spiral Flat – Oval duct is machine formed From Dustech

Round Spiral Duct. The flat oval shape is specifically designed for

low head room and restricted space locations which cannot

accept round duct.

1) The system is first designed on the basis of circular duct.

2) Where space limitations require the use of oval duct, the circular duct is converted to its equivalent Rola

duct Spiral Flat-oval duct by using Table 1. This table has been arranged in a manner that make its uses

similar to tables for rectangular duct and should be used in exactly the same way.

3) Spiral Flat-oval duct is made only in the sizes listed in tables 1. For Maximum economy, select your flat-oval

duct size from Table 1.

Flat-Oval Duct DesignThe design of a duct system utilizing flat-oval duct follows the same procedures used with rectangular duct.

356 381 406 457 508 559 610 660 711 762 813 864 914 965 1016 1047 1118 1168 1219 1270 1321 1372

152

#483

~279

#521

~292

#560

~305

#635

~318

#711

~330

#800

~343

#876

~368

#952

~381

#1041

~394

#1176

~406

203

#533

~343

#610

~368

#686

~381

#755

~406

#838

~419

#927

~445

#1003

~457

#1092

~470

#1168

~483

254

#584

~394

#660

~432

#737

~445

#826

~470

#902

~495

#978

~508

#1067

~533

#1143

~546

#1218

~559

#1308

~572

#1379

~604

#1461

~610

#1531

~621

#1626

~635

305

#635

~457

#711

~483

#787

~508

#876

~533

#953

~559

#1029

~572

#1118

~597

#1189

~625

#1270

~635

#1349

~662

#1435

~673

#1511

~696

#1600

~699

#1660

~716

#1753

~724

#1820

~742

#1918

~762

#1981

~784

356

#686

~508

#762

~546

#838

~572

#927

~597

#1003

~622

#1080

~648

#1165

~671

#1245

~680

#1320

~713

#1410

~724

#1481

~752

#1562

~762

#1646

~787

#1727

~797

#1802

~821

#1892

~846

#1952

~850

406

#648

~533

#737

~572

#813

~597

#889

~622

#978

~660

#1054

~686

#1131

~710

#1219

~724

#1291

~757

#1375

~775

#1452

~800

#1537

~813

#1612

~840

#1702

~851

#1773

~877

#1854

~921

#1923

~943

457

#711

~584

#787

~622

#864

~660

#940

~686

#1029

~711

#1102

~745

#1181

~762

#1267

~797

#1346

~813

#1423

~844

#1511

~851

#1583

~887

#1664

~902

#1750

~928

#1829

~947

#1894

~970

508

#749

~635

#838

~673

#914

~711

#1003

~737

#1073

~775

#1156

~800

#1241

~830

#1321

~851

#1394

~882

#1473

~902

#1554

~934

#1638

~940

#1724

~974

#1803

~978

#1865

~1003

610

#1087

~876

#1168

~900

#1248

~910

#1327

~940

#1408

~965

#1486

~995

#1567

~1006

#1646

~1032

#1726

~1040

#1807

~1062

Nominal Duct

Height (A)

Oval Made From

Dia (mm)

Height (A) = 152 mmWidth # (B) = 483 mmEQUIALENT ROUND DIA FOR EQUAL CAPACITY AND FRICTION LOSS = 279

Example A

B

Example

SpecificationsThickness:

0.50(26G) to 1.2 mm (18G)

Thickness of flat-oval spiral ducts as per

SMACNA “HVAC DUCT CONSTRUCTION

STANDARDS” – 2005

Standard Length : 4, 8, 10 and 12ft. length

The Spiral Flat-Oval has considerably less flat surface than rectangular duct. If the springy structure of flat-oval is adequately dampered. It has less surface susceptible to vibration. Thus, properly designed flat-oval duct can be superior in performance to rectangular duct.The characteristics of flat-oval duct parallel to those of circular-shaped duct are closely enough that slip-joint couplings can be used. Slip-joint couplings provide easier sealing against air leaks at the joints, a significant improvement over other types of duct connections.

There is an unfortunate tendency to make a surface application of sealer over a joint and assume that this is a

permanently satisfactory solution to the sealing problem. This is not the case, as surface-applied sealing has

provided that the sealer must be protected by metal, such as within a slip-joint, in order to be considered a

permanent seal.

The spiral flat-oval coupling and joint permits the use of the same experience-proven materials and techniques

for sealing that have been so successful in circular duct joints.

Under certain size and pressure conditions, both flat-oval and rectangular duct must be braced and reinforced

against deflection.

“Dustech” Spiral flat-oval duct can be arranged in different MOC and with insulation material such as Nitrile

Rubber, XLPE, Glasswool etc.

Spiral Flat-Oval compared with rectangular Duct

Material : Galvanized iron, Aluminium, stainless steel.

Surface Constructions : Plain or Corrugated (to increase the radial rigidity of the duct by 300%.

Surface Finish : Plain, Powder Coated.

Major Axis (mm)

Spiral Seam Duct

Logitudinal Scam Duct

FittingSuggested

Type of Joint

610 24 SWG 22 SWG 20 SWGGroove Slip Connector

915 22 SWG 22 SWG 20 SWGGroove Slip Connector

1220 22 SWG 20 SWG 20 SWG Flange

1525 20 SWG 20 SWG 20 SWG Flange

1780 20 SWG 18 SWG 18 SWG Flange

Over 1780 18 SWG 16 SWG 18 SWG Flange

Flat Oval Duct Construction for Positive-Pressure Duct System

Minimum Galvanized Steel Thickness

F

F

F

F

Air AttenuatorDustech make duct attenuator which are easy to install and are used in systems to

absorb sound. These are manufactured in galvanised sheet metal with 50mm

Rockwool sound absorption material with operating temperature upto 100ºC.

Flexible BellowDustech make flexible connector that eliminates duct system noise and vibration for Industrial & Commercial application. It is used between the machinery and duct work. It is an airtight, flexible joint that isolates vibration to the source and reduce noise inside the duct system.

Brouch ToolBrouch tool pulls duct section together and holds then in place while freeing both hands to align and install slip cleats.

Square Dampers

Dustech make Multilouver dampers are used for air flow control for either supply or exhaust air.

Material : G1

Round DamperDustech single leaf damper are used for balancing adjustment or control of air and are available in sizes from 100mm - 1500mm.

Material : G1, A1, SS

CouplingDustech make coupler are used for connecting flexible hose, spiral duct and connecting diffusers etc.

DUSTECH DUCT range of Products

Corner“DUSTECH” TDF Corners are fabricated from special machines. TDF Corners are

used to align the duct by manual insertion process. It is formed for the fixing of

3/8” carrage bolt. It is available in variety of metals..

Cleat“DUSTECH” Cleats are fabricated from 22 SWG Gi Sheet. It is

standard Length of 6” and installed at a interval of I50 mm.

Tie Rod“DUSTECH” threaded bars are used to hang the duct at the roof Height with the help of fasteners or clamps.

Gasket“DUSTECH” Gaskets offer Easy-to-use sealent to provide a mixture

and vapour-tight seal and to prohibit any leakages/losses in the duct. It is a self adhesive closed cell Industrial foam comprising of

neoprene, POC and nitrile.

W’ Bracket“DUSTECH” Brackets are used to support the duct from the bottom and is easy to complete the Installation on time.

Spacer Bar“DUSTECH” Space Bar are used to support the ducts from bottom

and give a rigide installation

DUSTECH

DUSTECH Guarantess its products to be free of defects in materials and workmanship for a period of one

year from the date of delivery from the factory, provided motors are properly installed with overload

protector. Dustech agrees to repair or replace defective parts or part to e returned to the factory, all

transportation charges prepaid. Dustech does not guarantee against abrasion, corrosion or erosion.

Dustech shall not be held responsible for any charges in connection with the removal or replacement of

alleged defective equipment nor for incidental consequential damages.

The intention of this brochure is to introduce you to,

an acquaint you with, the capabilities of the

DUSTECH oranization in the offered product areas.

It will not answer all your immediate questions, and

indeed, it will not doubt raise others, We welcome

your interest in our products and shall be very

pleased to provide further information.

In accordance with our policy of continual

improvement in design, we reserve the right to

depart from the details given in this brochure.

Plot No.- 6A, 13/3 Mile Stone, Manthura

Road, Faridabad - 121001 (HR.) INDIA

Ph. : +91 129 41320382

Mobile : +91 9999093086

E-mail : dustechduct@gmail.com

Web : www.dustechduct.com

DUSTECH DUCT CO. (P) LTD.

website : www.dustech.com