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 |
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