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.
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″
|