Products 
Heaters Air Duct Heaters Series DH Tubular
Heaters Air Duct Heaters Series DH Tubular
Series DH Tubular Air Duct Heaters feature 334 stainless steel elements, stainless steel element support, stainless steel support rods, 3-1/2" high temperature insulation below flange, NEMA 1 terminal enclosure, and replaceable element design.
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Recommended Operating Conditions
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Air Speed
(ft. per second) |
Maximum
Operating Temp. |
|
4
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1000°F
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9
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1100°F
|
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16
|
1200°F
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High temperature (1200° F max.)
Features:
- 20 watts per sq. inch on sheath
- 334 stainless steel elements - 1500°F max. sheath temperature
- Stainless steel element support
- Stainless steel support rods
- 3 1⁄2" high temp. insulation below flange
- 1⁄4" or 3⁄8" thick painted steel flange
- Nichrome A resistance wire sized for low wire watt density
- Recompacted bends
- Replaceable element design
- NEMA 1 terminal enclosure
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Volts
3-Phase |
#
Circuits |
KW
|
A
|
B
|
C
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D
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E
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G
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Wt.
(lbs.) |
#
Elems. |
Catalog #
|
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240
480 |
1
1 |
6
|
27 3⁄4
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20
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3 5⁄8
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5 5⁄8
|
10
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2 1⁄2
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25
|
6
|
DH6-6-3
DH6-6-5 |
|
240
480 |
1
1 |
12
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27 3⁄4
|
20
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5 5⁄8
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7 5⁄8
|
10
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3 1⁄2
|
35
|
12
|
DH12-12-3
DH12-12-5 |
|
240
480 |
1
1 |
18
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27 3⁄4
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20
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7 5⁄8
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9 5⁄8
|
12
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3
|
45
|
18
|
DH18-18-3
DH18-18-5 |
|
240
480 |
2
2 |
24
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27 3⁄4
|
20
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9 5⁄8
|
11 5⁄8
|
14
|
2 3⁄4
|
55
|
24
|
DH24-24-3
DH24-24-5 |
|
240
480 |
2
1 |
30
|
27 3⁄4
|
20
|
11 5⁄8
|
13 5⁄8
|
14
|
3 1⁄4
|
65
|
30
|
DH30-30-3
DH30-30-5 |
|
240
480 |
2
1 |
36
|
27 3⁄4
|
20
|
13 5⁄8
|
15 5⁄8
|
14
|
3 3⁄4
|
75
|
36
|
DH36-36-3
DH36-36-5 |
|
240
480 |
2
1 |
42
|
27 3⁄4
|
20
|
15 5⁄8
|
17 5⁄8
|
14
|
4 1⁄4
|
85
|
42
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DH42-42-3
DH42-42-5 |
|
240
480 |
4
2 |
48
|
27 3⁄4
|
20
|
17 5⁄8
|
19 5⁄8
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14
|
4 3⁄4
|
100
|
48
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DH48-48-3
DH48-48-5 |
|
240
480 |
3
3 |
54
|
27 3⁄4
|
20
|
19 5⁄8
|
21 5⁄8
|
14
|
5 1⁄4
|
110
|
54
|
DH54-54-3
DH54-54-5 |
|
240
480 |
5
2 |
60
|
27 3⁄4
|
20
|
21 5⁄8
|
23 5⁄8
|
14
|
5 3⁄4
|
120
|
60
|
DH60-60-3
DH60-60-5 |
|
240
480 |
2
2 |
75
|
32 3⁄4
|
25
|
21 5⁄8
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23 5⁄8
|
14
|
5 3⁄4
|
135
|
60
|
DH60-75-3
DH60-75-5 |
|
240
480 |
5
4 |
100
|
40 1⁄4
|
32 1⁄2
|
21 5⁄8
|
23 5⁄8
|
14
|
5 3⁄4
|
160
|
60
|
DH60-100-3
DH60-100-5 |
|
240
480 |
5
5 |
125
|
49 1⁄4
|
41 1⁄2
|
21 5⁄8
|
23 5⁄8
|
14
|
5 3⁄4
|
185
|
60
|
DH60-125-3
DH60-125-5 |
|
240
480 |
6
4 |
150
|
49 1⁄4
|
41 1⁄2
|
25 5⁄8
|
27 5⁄8
|
18
|
4 1⁄2
|
220
|
72
|
DH72-150-3
DH72-150-5 |
|
240
480 |
8
8 |
200
|
49 1⁄4
|
41 1⁄2
|
33 5⁄8
|
35 5⁄8
|
22
|
4 3⁄8
|
260
|
96
|
DH96-200-3
DH96-200-5 |
|
240
480 |
10
8 |
250
|
49 1⁄4
|
41 1⁄2
|
41 5⁄8
|
43 5⁄8
|
22
|
5 3⁄8
|
325
|
120
|
DH120-250-3
DH120-250-5 |
Note: 334 stainless steel is equivalent to Incoloy® 840
Item Menu
Certifications
Our heaters are currently UL recognized, CSA compliant and CE approved. We are ASME and National Board certified for Section VIII Div 1 Pressure Vessel Welding.
Additionally, we have built heaters to Military standards for the Army, Navy, Coast Guard and DCSC. We have designed and built systems to Canadian pressure vessel codes CRN, ABSA & TSSA. We also meet certain NSF, NACE and API standards.
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