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Screw Plug Immersion Heaters

Screw Plug Immersion Heaters consist of tubular heating elements welded or brazed into a threaded screw plug which can then be screwed into a threaded fitting in a tank wall.  Screw plug immersion heaters are available in configurations suitable for heating most liquids and gasses.
 

Screw Plug
NPT

*Minimum
Hole Diameter

“A”

“B”

“C”

Thermowell Bulb Size

in

mm

in

mm

in

mm

in

mm

in

mm

1"

1-1/8

29

7/8

22

1-1/4

32

1-3/8

35

1/4

6.4

1-1/4"

1-3/8

35

1-5/16

24

1-5/16

33

1-3/4

44

1/4

6.4

2"

2 -1/4

57

1-1/16

27

1-9/16

40

2-1/2

64

3/8

9.5

2-1/2"

2-1/2

64

1-5/16

33

2-1/16

52

3

76

3/8

9.5

Typical Applications

Steel Sheath— Suitable for tar, high to low viscosity petroleum oils, asphalt, wax, paraffin, degreasing solvents, alcohol, and other solutions not corrosive to steel sheath. Sheath temperatures to 750°F (399°C) dependant on application.

Steel Sheath Immersion Heaters Standard and Stock List
 

 

Incoloy® Sheath Suitable for process water, weak chemical solutions, oils, tar, caustic soda, detergent, alkaline solutions, molten salts, demineralized, deionized or pure water (sheath passivation is recommended), and other aqueous solutions not corrosive to Incoloy® sheath. Air, gas mixtures and super-heated steam. Sheath temperatures to 1600°F (871°C) dependant on application.
 

Incoloy Sheath Immersion Heaters Standard and Stock List 

 

Copper Sheath— Suitable for process water, water with very weak chemical solutions, demineralized, deionized or pure water, hot water storage for washrooms, showers, cleaning and rinsing parts, for freeze protection of cooling towers and sprinkler systems and other aqueous solutions not corrosive to copper sheath. Sheath temperatures to 350°F (177°C) dependant on application.

Copper Sheath Immersion Heaters Standard and Stock List
 

 

316 Stainless Steel Sheath—Suitable weak chemical solutions, deionized or pure water (sheath passivation is recommended), and other aqueous solutions not corrosive to 316 Stainless Steel sheath. Air, gas mixtures and super-heated steam. Sheath temperatures to 1200°F (649°C) dependant on application.

316 Stainless Steel Sheath Immersion Heaters Standard and Stock List 

   
 

 

 


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