TUBULAR & FINNED TUBULAR

 

TUBULAR & FINNED TUBULAR

Tubular Heaters are used in multiple applications like cylinders, dies, drums, holding tanks, injections and blow molding machines, and Plastic Extruders as well as many other applications.

Availability: In Stock Drum heaters only
Description

U.L. AND C-UL Recognized

No. E177353

 

Features
  • The Backer Hotwatt Tubular Heater has built-in resistance to shock, vibration, corrosion and temperature extremes.
  • The heater is swaged, reducing the diameter of the metal sheath and compacting the insulation. This insures rapid heat transfer and holds the coil in position for forming.
  • Many formations are available.
  • Long, trouble free service.
  • Made in U.S.A.

 

Construction
  1. Steel, stainless steel, copper, or Incoloy sheathed elements.
  2. Element wire situated in proximity to outside surface for maximum heat transfer and minimum internal temperature while preserving good dielectric qualities.
  3. Pure magnesium oxide compressed to an optimum density for best heat transfer and electrical insulation at elevated temperatures.
  4. Weld connection.
  5. Cold pin.
  6. Insulator.
  7. Standard post terminal.

 

Standard Sizes and Materials

The sheath materials available are stainless steel, steel, copper, and incoloy.

Standard diameters are: .260″, .315″, .375″, .440″and .475″.

Diameter tolerance is ± .010″.

Sheath Material

Max. Temp. Allowed on Sheath

Max. Length of Sheath

Max. Cold Lengths

Steel

750°F

252″

96″

Copper

350°F

252″

96″

St. Steel

1200°F

324″

96″

Incoloy

1600°F

324″

96″

Sheath Materials and Watt Densities

 

Application

Approx. Operating Temp.

Rec. Sheath Material

Watts/sq.in. Of Element Surface

Clamped to Surfaces

up to 300°F

500°F

800°F

1000°F

1200°F

1400°F

Steel

Steel

Incoloy

Incoloy

Incoloy

Incoloy

30

20

15

10

7

2.5

Still Air

(Sheath Temp.)

800°F

1000°F

1200°F

1400°F

Incoloy

Incoloy

Incoloy

Incoloy

7

11

14

30

Clamped into

Machined Grooves

500°F

800°F

900°F

Steel

St. Steel

Incoloy

25

15

15

Formula for Determination of Unit Wattage

Unit Wattage = Diameter x 3.142 x Heated Length x Allowable watts/sq.in.

Electrical Tolerances and Limits

Sheath Diameter

.260″

.315″

.375″

.440″

.475″

Min. OHMS/in.

.15

.05

.05

.05

.05

Max. OHMS/in.

80

50

50

50

50

Max. Voltage

250

300

480

600

600

Max. Amperes

20

30

40

40

40

Standard Length Tolerances

Sheath length

Length

Heated Length

Up to 20″

± 1/16″

± 2%

20″ to 100″

± 1/8″

± 2%

100″ to 200″

± 1/4″

± 2%

Cold Ends

When not specified, cold ends will be the minimum length as shown in table below. Longer cold lengths may be specified. Optional cold ends of unequal lengths are available.

Sheath length

Minimum Cold Ends

Up to 20″

1″

20″ to 100″

1 1/2″

100″ to 200″

4″

Mount Fitting

Fittings are available with light jam nuts (plated steel), plain washers (plated steel), and/or copper gaskets.

Brass bushings are used with copper and steel sheaths.Silver brazed stainless steel bushings are used with stainless steel and incoloy sheaths.Welded stainless steel bushings are available at additional cost.

Catalog Number

Sheath Diameter A”

Thread Size B”

EF-12

.260″

1/2″-20

EF-13

.315″

1/2″-20

EF-16

.375″

5/8″-18

EF-17

.440″

3/4″-16

EF-17

.475″

3/4″-16

Forming

If you plan to do the bending required, observe the minimum bend limits in the table, and do not plan any bend within 1″ of a cold end junction. Annealing for bending must be specified. If Backer Hotwatt is to do the bending, submit a sketch showing clearly the form the bent unit is to take.

Minimum Bend Radius

Diameter

.260″

.315″

.375″

.440″

.475″

Formed By Factory

1/4″

5/16″

3/8″

7/16″

7/16″

Formed By Customer

3/4″

1″

1 1/4″

1 1/2″

1 1/2″

Optional Terminations

Post terminations will be supplied unless otherwise specified.

SF3S: Post

SF2A: Lead Wire

A”

B

C”

Max. Amps.

A”

Max. Amps.

.260″

6-32

5/8″

20

.260″

21

.315″

6-32

5/8″

20

.315″

28

.375″

8-32

3/4″

30

.375″

28

.375″

10-32

1″

40

.440″

28

.440″

8-32

3/4″

30

.475″

28

.440″

10-32

1″

40

 

.475″

10-32

1″

40

SF3P: Pin

SF23: Hermetic Seal

A”

B”

C”

Max. Amps.

A”

B

C”

Max. Amps.

.260″

.091″

5/8″

20

.260″

8-32

1 11/16″

20

.315″

.135″

5/8″

20

.315″

10-32

1 7/8″

30

.375″

.156″

3/4″

40

.375″

10-32

1 7/8″

30

.440″

.156″

3/4″

40

.440″

1/4-28

2 1/8″

40

.475″

.156″

3/4″

40

.475″

1/4-28

2 1/8″

40

SF3T: Tab

SF11: Quick Connect

A”

Max. Amps.

A”

Max Amps.

.260″

20

.260″

20

.315″

30

.315″

30

.375″

30

.375″

30

.440″

30

.440″

30

.475″

30

.475″

30

Diameter:

.260: Incoloy

.315: Incoloy

.375: Incoloy

Maximum Amperage:

20

30

40

Sheath Length

Cat. No.

Max.Watts at 240V

Cat. No.

Max.Watts at 240V

Cat. No.

Max.Watts at 480V

20″

TA26-20

555

TA31-20

675

TA37-20

800

40″

TA26-40

1210

TA31-40

1465

TA37-40

1745

60″

TA26-60

1860

TA31-60

2255

TA37-60

2685

80″

TA26-80

2515

TA31-80

3050

TA37-80

3630

100″

TA26-100

3170

TA31-100

3840

TA37-100

4570

120″

TA26-120

3825

TA31-120

4630

TA37-120

5515

140″

TA26-140

4475

TA31-140

5425

TA37-140

6455

160″

TA26-160

4640

TA31-160

6215

TA37-160

7395

180″

TA26-180

4640

TA31-180

7010

TA37-180

8340

200″

TA26-200

4640

TA31-200

7005

TA37-200

9285

220″

TA26-220

4640

TA31-220

7005

TA37-220

10225

240″

TA26-240

4640

TA31-240

7005

TA37-240

11170

Diameter:

.440: Incoloy

.475: Incoloy

.260: St. Steel

Maximum Amperage:

40

50

20

Sheath Length

Cat. No.

Max.Watts at 480V

Cat. No.

Max.Watts at 480V

Cat. No.

Max.Watts at 240V

20″

TA44-20

960

TA47-20

1055

TT26-20

420

40″

TA44-40

2090

TA47-40

2300

TT26-40

910

60″

TA44-60

3225

TA47-60

3545

TT26-60

1395

80″

TA44-80

4355

TA47-80

4790

TT26-80

1885

100″

TA44-100

5485

TA47-100

6035

TT26-100

2375

120″

TA44-120

6615

TA47-120

7280

TT26-120

2865

140″

TA44-140

7745

TA47-140

8520

TT26-140

3355

160″

TA44-160

8880

TA47-160

9765

TT26-160

3845

180″

TA44-180

10010

TA47-180

11010

TT26-180

4340

200″

TA44-200

11140

TA47-200

12255

TT26-200

4705

220″

TA44-220

12270

TA47-220

13495

TT26-220

4705

240″

TA44-240

13400

TA47-240

14740

TT26-240

4705

Diameter:

.315: St. Steel

.375: St. Steel

.440: St. Steel

Maximum Amperage:

30

40

40

Sheath Length

Cat. No.

Max.Watts at 240V

Cat. No.

Max.Watts at 240V

Cat. No.

Max.Watts at 480V

20″

TT31-20

505

TT37-20

600

TT44-20

720

40″

TT31-40

1095

TT37-40

1305

TT44-40

1570

60″

TT31-60

1690

TT37-60

2015

TT44-60

2415

80″

TT31-80

2285

TT37-80

2720

TT44-80

3265

100″

TT31-100

2880

TT37-100

3425

TT44-100

4115

120″

TT31-120

3475

TT37-120

4135

TT44-120

4960

140″

TT31-140

4065

TT37-140

4840

TT44-140

5810

160″

TT31-160

4660

TT37-160

5550

TT44-160

6660

180″

TT31-180

5255

TT37-180

6255

TT44-180

7505

200″

TT31-200

5850

TT37-200

6965

TT44-200

8355

220″

TT31-220

6440

TT37-220

7670

TT44-220

9205

240″

TT31-240

7035

TT37-240

8375

TT44-240

10050

Diameter:

.260: Steel

.315: Steel

.440: Steel

Maximum Amperage:

20

30

40

Sheath Length

Cat. No.

Max.Watts at 240V

Cat. No.

Max.Watts at 240V

Cat. No.

Max.Watts at 240V

20″

TS26-20

280

TS31-20

335

TS44-20

480

40″

TS26-40

605

TS31-40

730

TS44-40

1045

60″

TS26-60

930

TS31-60

1130

TS44-60

1610

80″

TS26-80

1260

TS31-80

1525

TS44-80

2175

100″

TS26-100

1585

TS31-100

1920

TS44-100

2745

120″

TS26-120

1910

TS31-120

2315

TS44-120

3310

140″

TS26-140

2240

TS31-140

2710

TS44-140

3875

160″

TS26-160

2565

TS31-160

3105

TS44-160

4440

180″

TS26-180

2890

TS31-180

3505

TS44-180

5005

200″

TS26-200

3220

TS31-200

3900

TS44-200

5570

220″

TS26-220

3545

TS31-220

4295

TS44-220

6135

240″

TS26-240

3870

TS31-240

4690

TS44-240

6700

Diameter:

.315: Copper

.440: Copper

Maximum Amperage:

30

40

Sheath Length

Cat. No.

Max.Watts at 240V

Cat. No.

Max.Watts at 600V

20″

TC31-20

1345

TC44-20

1925

40″

TC31-40

2930

TC44-40

4185

60″

TC31-60

4515

TC44-60

6445

80″

TC31-80

6095

TC44-80

8710

100″

TC31-100

6890

TC44-100

10970

120″

TC31-120

6890

TC44-120

13230

140″

TC31-140

6890

TC44-140

15495

160″

TC31-160

6890

TC44-160

17755

180″

TC31-180

6890

TC44-180

18885

200″

TC31-200

6890

TC44-200

18885

220″

TC31-220

6890

TC44-220

18885

240″

TC31-240

6890

TC44-240

18885

Wattage

Wattages as shown in the above tables are based on sheath material or voltage/amperage limitations. For allowable wattage for your application, refer to Sheath Material/Watt Density chart above.

How to Order

Specify: Catalog number, wattage, voltage, termination, and other optimal features. If forming is required, include a dimensional sketch and reference formation number, if applicable.

 

Example: TA31-40/1000W/240V/SF3S