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Flanged Immersion Heaters

Flanged Immersion Heaters for use in tanks and pressurized vessels to heat both liquids and gases. They mate to a companion flange that is either welded to a tank wall or used in circulation heaters.
 

Flange
size

Flange Mounting

Flange
Thickness
“F”

Mounting
Bolt Circle
“C”

Flange
Diameter
“D”

Cold
Section
“S”

Bundle
Diameter
“H”

NEMA 1 Housing

Number
of
Elements

Hole Size

No.

“K”

“L”

in

in

mm

 

in

mm

in

mm

in

mm

in

mm

in

mm

in

mm

in

mm

Std.

Max.

 3

3/4

19

 4

15/16

24

6

152

712

191

4

102

2-3/4

 70

4-5/8

117

3-1/8

 79

 3

 6

 4

3/4

19

 8

15/16

24

7-1/2

191

9

229

4

102

3-7/8

 98

6

152

4

102

 6

 6

 5

7/8

22

 8

15/16

24

8-1/2

216

10

254

4

102

5

127

7

178

4

102

 6

 9

 6

7/8

22

 8

1

25

9-1/2

241

11

279

4

102

6

152

8

203

6

152

12

15

 8

7/8

22

 8

1-1/8

29

11-3/4

298

13-1/2

343

6

152

7-13/16

198

10

254

6

152

18

24

10

1

25

12

1-3/16

30

14-1/4

362

16

406

6

152

9-3/4

248

11-5/8

295

6

152

27

36

12

1

25

12

1-1/4

32

17

432

19

483

6

152

11-3/4

298

13-1/2

343

6

152

36

54

14

1-1/8

29

12

1-3/8

35

18-3/4

476

21

533

6

152

12-3/4

324

15-1/8

384

6

152

45

72

Typical Applications
Low Carbon Steel Sheath—Immersion heaters for fluid heat transfer media, tar, high to low viscosity petroleum oils, asphalt, wax, molten salt, and other solutions not corrosive to a steel sheath.


8 Watts/sq.in. Steel Sheath Immersion Heaters
Applications: Fuel Oils (Bunker C and Number 6)

15 Watts/sq.in. Steel Sheath Immersion Heaters
Applications: Fuel Oils (Number 4 and 5)

23 Watts/sq.in. Steel Sheath Immersion Heaters
Applications: Lightweight Oils, Heat Transfer Oils, Degreasing Solutions

Standard Steel Sheath Immersion Heater List

 
Copper Sheath—Immersion heaters for clean water heating for washrooms, showers, rinse tanks and freeze protection of storage tanks.
 

60 Watts/sq.in. Copper Sheath Immersion Heaters
Applications: Clean Water

Stock and Standard Copper Sheath Immersion Heater List

 

 

 
Incoloy® 800 Sheath— Immersion heaters with Incoloy sheath are used for air heating and immersion heating of potable water and other liquids that are not corrosive to an Incoloy® 800 sheath

16 Watts/in.sq. Incoloy Sheath Immersion Heaters.
Applications: Heat Transfer Oils, Liquid Paraffin

23 Watts/in.sq. Incoloy Sheath Immersion Heaters.
Applications: Forced Air, Caustic Solutions, Degreasing Solutions

48 Watts/in.sq. Incoloy Sheath Immersion Heaters.
Applications: Process Water

Stock and Standard Incoloy Sheath Immersion Heater List

 
316 Stainless Steel Sheath—Immersion heaters with 316 stainless steel elements are often used for deionized water heating.
 

60 Watts/in.sq. 316 Stainless Steel Incoloy Sheath Immersion Heaters.
Applications: Deionized Water

Standard 316 Stainless Steel Sheath Immersion Heater List

 

 Optional Sheath Materials and Treatments

Optional Element Sheath Materials

304 Stainless Steel— A Chromium (18-20%), Nickel (8-11%), Iron Alloy used in the food industry, sterilizing solutions, air heating and many organic and inorganic chemicals.

321 Stainless Steel— A Chromium (17-20%), Nickel (9-13%), Iron Alloy modified with the addition of titanium to prevent carbide precipitation and the resulting intergranular corrosion that can take place in certain mediums when operating in the 800-1200°F (427-649°C) temperature range.

Surface Metal Treatments

Flanged Immersion Heater surfaces in contact with the material being heated can be passivated or electro-polished to improve their resistance to corrosion.

Passivation removes surface contamination, usually iron, so that the optimum corrosion resistance of the stainless steel is maintained. Surface contamination would come from the small amount of steel that may be worn off a tool during the manufacturing process. Passivating is accomplished by dipping the heater in a warm solution of nitric acid.

Electro-Polishing is an electrochemical process that removes surface imperfections and contaminants, enhancing the corrosion resisting ability of the stainless steels. The resultant surface is clean, smooth and bright. Many medical and food applications require this finish.

 

 
 

 

 


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