Tubular Heaters

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Tubular Heaters Termination
Tubular Heaters Termination

Terminations

Diameter
(in.)

Sheath Materials
Available

Maximum
Voltage

Maximum
Amperage

Maximum
Length (in.)

Minimum Factory
Bend Radius (in.)

Minimum Field
Bend Radius (in.)

.200

Incoloy

240

12

98"

1/4"

3/4"

.260

Steel, Incoloy

250

15

188"

5/16"

1-1/4"

.315

Steel, 316 SS, Incoloy

480

30

294"

3/8"

1"

.330

Steel, 316 SS, Incoloy

480

30

294"

3/8"

1-1/4"

.375

steel, 316ss, Incoloy

480

30

294"

9/16"

2"

.430

Steel, 304 SS, 316 SS Incoloy

600

40

312"

7/16"

1-3/8"

.475

Steel, 304 SS, 316 SS Incoloy

600

40

312"

1/2"

1-3/8"


Sheath Temperature

Guidelines

Sheath Material

Sheath Temperature (Max.)

Steel

750°F

Stainless

1200°F

Incoloy

1600°F

Material Being
Heated

Maximum Recommended
Watt Density

Recommended Sheath Material

Air to 750°F

30

Steel

Air to 1200°F

40

304 SS or 316 SS

Air to 1600°F

40

Incoloy

Tap Water

60

316SS or Incoloy

Distilled Water

60

304SS, 316SS, or Incoloy

Deionized Water

60

316SS

Hot Runner Molds (Manifolds)

60

304SS or 316SS

Light Oils, Greases, Heat Transfer Fluids

23

Steel

Medium Weight Oils

15

Steel

Heavy Weight Oils

8

Steel

Caustic Solutions

23

Incoloy


End Seals Tubular heaters use Magnesium Oxide (MgO) as an insulator between the heating coil and the sheath. MgO is hygroscopic, and will absorb and retain water molecules from its surroundings.

This is an undesired characteristic as any humidity inside the heater will corrode the resistance wire, degrade the resistance of the heater, and even allow an arc between the sheath and the resistance wire.

To prevent moisture from affecting the performance of the heater, a variety of end seals are available. Listed below are our standard recommendations. Combinations of these end seals are available as are other options not listed here.

Tubular Heaters

End Seal

Type

Max. Cont. Use Temp.

Typical or General Usage / Application

Cement

P

2000 °F

Extremely high temperature applications, for low vapor transmission rates

Silicone Barrier

MS

600 °F

Porous, moisture resistant, general usage on tubular products.

Epoxylite

EX

600 °F

Hermetic, long term stable insulation resistance.

High Temp Silicone Rubber

VH

450 °F

Moisture / Chemical Resistant. General Sealing.

Silicone Rubber

V

350 °F

Moisture / Chemical Resistant. General Sealing.

Epoxy

E

266 °F

Hermetic, long term stable insulation resistance.

Rubber Molded End Seal

RU

250 °F

Hermetic, long term stable insulation resistance. Full terminal


Alternate Seals Available Upon Request

Threaded Fittings

  • Threaded bulkhead fittings can be supplied on the terminal ends of tubular elements.
  • A gasket washer permits liquid tight installation in tank walls for immersion heating of water, oil, and other liquids.
  • Watertight gasket and lock nut are included.
Tubular heaters

Element Dia. (in.)

Thread Size

Tank Wall Hole Dia.

Thread Length

Hex A.F.

Rd. Diameter

Specify Material

.260

7/16” - 20

15/32”

5/8”

5/8”

-----

Stainless Steel

.315

1/2” - 20​

17/32”

1/2”

-----

3/4”

Stainless Steel

.430

5/8” - 18​

21/32”

13/16”

7/8”

-----

Stainless Steel

.475

5/8” - 18

21/32”

13/16”

7/8”

-----

Stainless Steel


Other Options

  • Brackets
  • Locating Rings
  • Washers
  • “Bright Sheath Passivation” + Nitric Acid Bath + Glass Bead Bright Finish
Tubular heaters
Tubular heaters

.315 inch Diameter

  • 60W per square inch, 316SS
  • 23W per square inch, Incoloy
  • 23 W per square inch, Steel

Volts

Watts

Length (in.)

Heated Length (in.)

Unheated (in., each end)

Part #

120

500

29.00

22.00

3.5

TU31Y-0290A

240

500

29.00

22.00

3.5

TU31Y-0290B

120

750

40.00

33.00

3.5

TU31Y-0400A

240

750

40.00

33.00

3.5

TU31Y-0400B

120

1000

51.00

44.00

3.5

TU31Y-0510A

240

1000

51.00

44.00

3.5

TU31Y-0510B

Dimensions:
Depending on the number of bends the hotflex length can increase up to 1 %.


Type

L Min
[mm]

L Max
[mm]

Tube section
Max [mm]

Min. bending
radius internal

max. Sheath surface
load [W/cm2]

max. wattage
[W] at 230 V

6.0

300

1.800

24

6.5

10

2190

6.5

300

1.800

24

6.5

10

2190

8.0

300

2.600

10

10

15

5200

8.0

300

2.600

10

10

15

5200

8.2

300

2.600

10

10

15

5200

8.5

300

2.600

10

10

15

5200

10.0

300

2.600

10

10

12.5

5200

See our Large Supply by Clicking on the Stock List Tab above.

Contact Hampton Controls for more info: ​724-861-0150       

Please call for any special needs, in most cases, we are able to create a custom solution.     

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