Watlow Heater Catalog

Tubular Heaters

FIREBAR Single/Double-Ended Heaters Bend Formations FIREBAR elements can be formed into compounds, R 1 R 2 H A multi-axis and multi-plane configurations from 15 common bends. Custom bending with tighter tolerances can be made to meet specific application needs. Formation is limited by bending parameters specified in the illustrations of major and minor axis bends on the previous page. On these illustrations, please note the no-heat end location. R 1 R 2 H A C L A R 1 R 2 R 1 R 1 R 2 H H

The no-heat end junction must be located a minimum of 1 in. (25 mm) from any bend. If these parameters are not followed, the heater may fail prematurely. Field bending not recommended. Illustrated below are the common bends that can be ordered for all FIREBAR heating elements. To order a common bend, specify the figure number and critical dimensions . Note : The alpha characters and symbols are used to designate specific dimensions within each illustration. H R 1

C

L

R 1

R 1

H

C

L

A

L

A

R 2

R 2

K

H

Minor Axis

Major Axis A

Minor Axis

Major Axis

Figure 1B

Figure 1A R 1

Figure 2B

Figure 2A

R 1

A

R 1

H

R 1

R 1

A R 2

L

H

H

H

R 1

R 1

R 2

H

H

A

R 1

R 1

H

R 1

H

A

C

R 2

R 2

< ° (Angle)

R 2

K

A

K

L

A

L

R 1

C

A

F

L

A

A

R 2

R 1

H

Figure 3A

Figure 3B

Figure 4A

Figure 4B

R 2

H

R 1

A

H

A

R 1

R 1

H

R 1

H

R 1

A R 1

R 1

< ° (Angle)

H

R 2

H

A

H

R 2

< ° (Angle)

R 2

K

R 2

A

L

H

R 1

F

R 1

C A

F

L

R 2 A

C

L

R 2

L

A

A

Figure 6B

Figure 6A R 1

Figure 5A

Figure 5B

A

H

R 1

R 1

R 1

R 1

R 1

H

< ° (Angle)

R 2

H

A

H

H

R 2

H

H

R 1

R 2

R 1

H

A R 2

H

R 1

F

R 1

R 2

R 1

C

R 1 L

L

A

A

R 2

R 1

K

R 3

H

L

K

L

A

A

R 1

A

H

A

A

Figure 7B

Figure 7A

Figure 8B

Figure 8A

A

H

R 1

R 1

R 1

R 1

H

R 2

R 1

H

H

R 1

R 2

H

R 1

H

A

R 2

H

R 1

R 1

R 2

K

R 2

R 1

K

L

A

L

R 3

A

K

A

R 3

K

L

A

A

A

H

R 1

R 1

94

R 2

R 2

H

K