Straight Finned Tubular Elements

AccuTherm’s finned tubular heaters are suitable for use in a wide variety of forced air heating applications

The steel units are suitable for applications where the sheath temperature will not exceed 850° F.

For higher temperatures or in applications where corrosion is a problem these can be made in stainless steel or monel.

Units can be assembled in a frame to provide a compact duct heater.

Because of the greater surface area provided by the heat transfer fins, it is possible to fabricate units providing greater kW capacities, with lower operating temperatures.

Product Inquiry

Standard Features

Seamless steel sheath material.

High purity MgO Powder, compacted to provide maximum heat conductivity and optimum dielectric strength.

Type ‘A’ 80/20 resistance wire sized to provide the lowest wire watt density for maximum life, precision wound to provide uniform heat flux over length of element.

Fusion welded junction between cold pin resistance wire giving superior life.

Bends recompacted to restore MgO density on formed units.

Continuous steel fin edge wound and copper brazed to heater sheath. This provides maximum heat transfer from sheath to fin, without vibration.

Fin and sheath are painted with high temperature aluminum paint to resist oxidation.

Optional Features

Threaded fittings for mounting

Ceramic to metal end seals for high temperature or corrosive environments

Other sheath and fin materials

High temperature ceramic coating

Custom bracket mountings

Custom terminal options

Also available in smaller diameter units

60 Watts per Lineal Inch Steel Sheath with Steel Fins 11 Watts/SQ. In. Straight Length

Catalog #
Watts
Volts
A
B
C
E
STFL-100-2
STFL-100-4
1000
240
480
22 ¾
18 ¾
25
2″
STFL-125-2
STFL-125-4
1250
240
480
26
22
28 ¼
2″
STFL-150-2
STFL-150-4
1500
240
480
31
27
33 ¼
2″
STFL-200-2
STFL-200-4
2000
240
480
39 ⅜
35 ⅜
41 ⅝
2″
STFL-250-2
STFL-250-4
2500
240
480
47 ¾
43 ¾
50
2″
STFL-300-2
STFL-300-4
3000
240
480
56
52
58 ¼
2″
STFL-400-2
STFL-400-4
4000
240
480
72 ¾
68 ¾
75
2″
STFL-500-2
STFL-500-4
5000
240
480
89 ⅜
85 ⅜
91 ⅝
2″
STFL-600-2
STFL-600-4
6000
240
480
106
102
108 ¼
2″

75 Watts per Lineal Inch Steel Sheath with Steel Fins 14 Watts/SQ. In. Straight Length

Catalog #
Watts
Volts
A
B
C
E
STFM-100-2
STFM-100-4
1000
240
480
19 ⅜
15 ⅜
21 ⅝
2″
STFM-125-2
STFM-125-4
1250
240
480
22 ¾
21
25
2″
STFM-150-2
STFM-150-4
1500
240
480
26
22
28 ¼
2″
STFM-200-2
STFM-200-4
2000
240
480
32 ¾
32 ¾
35
2″
STFM-250-2
STFM-250-4
2500
240
480
39 ⅜
35 ⅜
41 ⅝
2″
STFM-300-2
STFM-300-4
3000
240
480
46
42
48 ¼
2″
STFM-400-2
STFM-400-4
4000
240
480
59 ⅜
55 ⅜
61 ⅝
2″
STFM-500-2
STFM-500-4
5000
240
480
72 ¾
68 ¾
75
2″
STFM-600-2
STFM-600-4
6000
240
480
86
82
88 ¼
2″

100 Watts per Lineal Inch Steel Sheath with Steel Fins 18 Watts/SQ. In. Straight Length

Catalog #
Watts
Volts
A
B
C
E
STFH-100-2
STFH-100-4
1000
240
480
16
12
18 ¼
2″
STFH-125-2
STFH-125-4
1250
240
480
18 ½
14 ½
20 ¾
2″
STFH-150-2
STFH-150-4
1500
240
480
21
17
23 ¼
2″
STFH-200-2
STFH-200-4
2000
240
480
26
22
28 ¼
2″
STFH-250-2
STFH-250-4
2500
240
480
31
27
33 ¼
2″
STFH-300-2
STFH-300-4
3000
240
480
36
32
38 ¼
2″
STFH-400-2
STFH-400-4
4000
240
480
46
42
48 ¼
2″
STFH-500-2
STFH-500-4
5000
240
480
56
52
58 ¼
2″
STFH-600-2
STFH-600-4
6000
240
480
66
62
68 ¼
2″

Brochures

Closed Tank Heating

Watt Density

Percentage of Wattage

Looking for a
heating solution?

Discuss your project in detail with one of our Application Engineers and they will provide a heating solution perfectly suited to the needs of your application, as well as your budget. Contact us today!

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