Series DM Tubular Air Duct Heaters feature Incoloy® 840 elements, stainless steel element support, stainless steel support rods, painted flange, NEMA 1 terminal enclosure, and replaceable element design.

Moderate temperature (750°F max.)

Features:

  • 20 watts per sq. inch on sheath
  • Incoloy 840 elements – 1700°F max. sheath temperature
  • Stainless steel element support
  • Stainless steel support rods
  • Painted steel flange
  • NEMA 1 terminal enclosure
  • Replaceable element design
  • Recompacted bends
  • 1″ insulation in terminal housing
Recommended Operating Conditions
Air Speed
(ft. per second)
Maximum
Operating Temp.
6
650°F
9
700°F
16
750°F
air duct series dl dm tubular heater
Volts
3-Phase
#
Circuits
KW
A
B
C
D
E
G
Wt.
(lbs.)
#
Elems.
Catalog #
240
480
1
1
6
27 1⁄8
20 3⁄8
3 5⁄8
5 5⁄8
10
2 1⁄2
20
6
DM6-6-3
DM6-6-5
240
480
1
1
12
27 1⁄8
20 3⁄8
5 5⁄8
7 5⁄8
10
3 1⁄2
26
12
DM12-12-3
DM12-12-5
240
480
1
1
18
27 1⁄8
20 3⁄8
7 5⁄8
9 5⁄8
12
3
35
18
DM18-18-3
DM18-18-5
240
480
2
1
24
27 1⁄8
20 3⁄8
9 5⁄8
11 5⁄8
14
2 3⁄4
42
24
DM24-24-3
DM24-24-5
240
480
2
1
30
27 1⁄8
20 3⁄8
11 5⁄8
13 5⁄8
14
3 1⁄4
50
30
DM30-30-3
DM30-30-5
240
480
2
1
36
27 1⁄8
20 3⁄8
13 5⁄8
15 5⁄8
14
3 3⁄4
60
36
DM36-36-3
DM36-36-5
240
480
2
1
42
27 1⁄8
20 3⁄8
15 5⁄8
17 5⁄8
14
4 1⁄4
70
42
DM42-42-3
DM42-42-5
240
480
4
2
48
27 1⁄8
20 3⁄8
17 5⁄8
19 5⁄8
14
4 3⁄4
80
48
DM48-48-3
DM48-48-5
240
480
3
3
54
27 1⁄8
20 3⁄8
19 5⁄8
21 5⁄8
14
5 1⁄4
90
54
DM54-54-3
DM54-54-5
240
480
4
2
60
27 1⁄8
20 3⁄8
21 5⁄8
23 5⁄8
14
5 3⁄4
97
60
DM60-60-3
DM60-60-5