Spiral Air Duct - Spiral Ducts and Fittings - Hi-sea

Spiral Air Duct

Spiral Air Duct

Spiral Air Duct

1. Application
The air duct is mainly used to connect the air circulation between two places and play the role of ventilation. The most widely used in the market is the spiral duct.
2. Type Identification Method
Duct Rd × L
For example: the duct with the 500mm diameter and the 6m lengths is identified as R500 × 6.
Pre-heat insulation duct: PRd × L
NOTE: (1). Normal: L=(max)400/each
(2). Insulation materials: mineral wool, rubber and plastic or glass fiber
(3). Thickness of insulation: δ=12.5mm δ=15mm or 25mm, unless otherwise stated, then δ=12.5mm.
3. Dimension Table

Non-heat insulation oblate spiral duct (BR)

Specifications

Process circle

dia. D

a

b

kg/m

Wgt.kg/m

BR125

125

75

154

2.1

BR150

150

90

184

2.52

BR175

175

100

218

3.07

BR190

190

115

233

3.30

BR215

215

125

266

3.55

BR250

250

140

312

4.18

BR250

250

150

307

4.19

BR275

275

150

346

5.03

BR300

300

150

386

5.26

BR325

325

150

425

5.69

BR360

360

200

465

6.31

BR400

400

200

514

6.70

 Pre-heat insulation oblate spiral duct (AR)

Specifications

Process circle dia. D

a

b

kg/m

Wgt.kg/m

Int. Dia.

Ext. Dia.

AR125

125

150

75

154

2.1

AR150

150

175

90

184

2.52

AR175

175

200

100

218

3.07

AR190

190

215

115

233

3.30

AR215

215

240

125

266

3.55

AR250

250

275

140

312

4.18

AR250

250

275

150

307

4.19

AR275

275

300

150

346

5.03

AR300

300

325

150

386

5.26

AR325

325

350

150

425

5.69

AR360

360

385

200

465

6.31

AR400

400

425

200

514

6.70

Note: Generally insulation thicknessδ=12.5mm of duct is suitale for type AR≤240 and insulation thickness δ=15mm is suitable for type 345≤AR≤945. Insulation thickness also can be decided by customers.
4. Drawing


Spiral Air DuctSpiral Air Duct

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