Chromalox Tubular Heaters Modifications

Tubular Heaters

Components

Modifications

World Leader in the Manufacture of Electric
Heating Elements — Chromalox offers the

most complete line of tubular heaters avail­able. Standard diameters are:

Standard
Diameters

0.2

0.246

0.260

0.315

0.375

0.43

0.475

3/8”
1/2”

3/8”
7/16”

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Round

Triangular

(heart shape)

Flat Pressed

Round Cross Section — Highly adaptable

where elements must be bent — particularly if
bending is performed in the field.

Triangular Cross Section — Patented process
produces elements with the closest possible
dimensional control.

Triangulated Cross Section — Flat pressed.
Patented process provides large contact area
for clamp-on applications. This means more
efficient heat transfer, fewer elements since
higher element ratings may be employed.

Voltage or Wattage — Heaters can be made
for operation on any voltage and rated at any
wattage suitable for the application within
practical limits. For voltages higher than 480V,
specify high voltage terminal construction.
See Component section Tubular Heater (0.475
or 1/2" diameter only).

Special Wattage Distribution — Heaters can
be made with higher wattages toward the end
of the heated section to help offset losses in
certain applications. Check with your Local
Chromalox Sales office for additional
information.

Tubing — Standard industrial grade wall
thickness:

Cross-Section

Views

Repressed Bends — Tubulars can be bent

to tighter radii at the factory. Bends are then
repressed to ensure re-compaction of insula­tion for long life. Customer bending on larger
radii does not require repressing. (See Factory
Bending Guidelines in this section).

Sheath Length — Larger diameter heaters can
be made in unspliced lengths up to 51 feet.

This eliminates the need for a spliced joint
which is always a possible weak point that
might cause premature heater failure.

Element Dia. (In.)

0.2 10

0.246 40

0.375 40

0.315 40

0.43 40

0.475 51
3/8 17±1/8"
1/2 17±1/8

Note— Single-end elements have a
maximum sheath length of 10 feet.

Max. Heater

Length (Ft. ± 1%)

Terminal Construction — Many choices to

suit your application. Tubular elements gener­ally have a terminal for electrical connection
at each end. Single end construction has both
terminals at the same end.

UL and CSA — Chromalox tubular heaters
can be furnished as UL Recognized and CSA
Certified components with the addition of a
terminal end seal. Terminal end seals can be
added to stock elements and shipped in one
week. (UL File E198480, Guide UBJY2, CSA
File 40859). Use “end seal/moisture barrier” in
place of end seal.

VDE and CE — Chromalox tubular heaters can
be furnished as VDE Certified and CE certified.
Contact your Local Chromalox Sales office.

Wide Choice of Sheath Materials — Available
to meet a wide variety of applications. Stan­dard sheath materials are: INCOLOY
type 304 and 316 stainless
steel, copper, INCONEL

Element

Dia. (In.)

0.246

0.315
3/8
1/2-0.475

0.246

0.315
3/8
1/2-0.475

0.246

0.315
3/8
1/2-0.475

®

and MONEL®.

Fitting

Material

Brass
Brass
Brass
Brass

Steel
Steel
Steel
Steel

Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel

®

, steel,

Mtg. Hole

Dia. (In.)

13/32
15/32
17/32
21/32

13/32
15/32
17/32
21/32

13/32
15/32
17/32
21/32

In addition, titanium and other 300
series stainless steel sheaths are
available upon request. For applica­tions requiring other materials,
contact your Local Chromalox Sales
office.

Cold Section — Longer cold ends can be sup­plied, as required, up to 20 inches. For longer
cold ends, contact your Local Chromalox
Sales office.

Factory Bending — Tighter bends can be
made at the factory.

Tubular heaters can be formed to many dif­ferent shapes to suit your application. This is
done by specially designed bending tools and
repressing dies for bending on many different
radii.

Additional Features — Many additional fea­tures are available for the difficult jobs which
require custom designed elements employing
Chromalox's vast engineering experience.

Threaded Fittings

Nickel Plated
Steel Washer

Max. Wall
Thickness

(In.)

7/32
5/16
5/16
5/16

7/32
5/16
5/16
5/16

7/32
5/16
5/16
5/16

A

Thrd. Size

F

3/8 - 24
7/16 - 28
1/2 - 28
5/8 - 24

3/8 - 24
7/16 - 28
1/2 - 28
5/8 - 24

3/8 - 24
7/16 - 28
1/2 - 28
5/8 - 24

B

15/32
13/16
13/16
13/16

15/32
13/16
13/16
13/16

15/32
13/16
13/16
13/16

Gasket Washer

Welded or

Brazed Ring

Dimensions (In.)

A B

7/8
7/8
7/8
1

7/8
7/8
7/8
1

7/8
7/8
7/8
1

Tubular

A-7