Screw Plug Immersion Heaters Selection Guidelines

IMMERSION - Screw Plug Immersion Heaters

Selecting a Screw Plug Heater

The selection of the proper screw plug immersion heater requires critical engineering judgement. After determining the heat requirement (see the Technical section of this catalog), the proper selection of the screw plug material, heating element sheath material and correct watt density is critical for long life of the heater. The following table may be used as a guide to this selection, along with the Technical Information at the back of this catalog. Ultimate choice is determined by the knowledge of the process and engineering acumen of the plant engineer.

Application Factors

Heater application is influenced by the following parameters.

  • The heated media, viscosity, specific heat, density and corrosive properties.
  • Contaminants or pH present in the media.
  • The corrosion resistant properties of heater sheath material.
  • Watt density of the heating element—the heat output per square inch.
  • Screw plug material.

Typical Applications

See screw plug immersion heater selection guide below for your application.

  • Hot Water Storage Tanks
  • Warming Equipment
  • Preheating all Grades of Oil
  • Food Processing Equipment
  • Cleaning and Rinsing Tanks
  • Heat Transfer Systems
  • Process Air Equipment
  • Boiler Equipment
  • Freeze Protection of Any Fluid

Screw Plug Immersion Heaters — Selection Guidelines

Screw Plug Immersion Heaters — Selection Guidelines

Note — Liquid level controls are suggested for all immersion heating applications. See Controls section in this catalog.

Application Guideline- Screw Plug Immersion Heaterss

Application Screw Plug Size (In.) Sheath Material Screw Plug Material HEater Model Integral Thermostat Page
Clean Water
1
Copper
Brass
ARTM
Yes
B-7
1-1/4
Copper
Brass
MT-1
No
B-10
2
Copper
Brass
EMT-3
No
B-15
2
Copper
Brass
ARMT-2
Yes
B-11
2
Copper
Brass
MT-2
No
B-13
2
INCOLOY®
Brass
CH-SD
No
B-16
2-1/2
Copper
Brass
ARMT-3
Yes
B-17
2-1/2
Copper
Brass
MT-3
No
B-21
Process Water
1
SS
SS
ARTMS
Yes
B-23
2
SS
SS
ARMTS-2
Yes
B-27
2
SS
SS
MTS-2
No
B-29
2
SS
SS
AREMTS-3
Yes
B-31
2
SS
SS
EMTS-3
No
B-32
2-1/2
SS
SS
ARMTS-3
Yes
B-34
2-1/2
SS
SS
MTS-3
No
B-36
Solution Water
2
INCOLOY®
SS
ARMTI-2
Yes
B-38
2
INCOLOY®
SS
MTI-2
No
B-40
2
INCOLOY®
SS
AREMTI-3
Yes
B-41
2
INCOLOY®
SS
EMTI-3
No
B-42
2-1/2
INCOLOY®
SS
ARMTI-3
Yes
B-43
2-1/2
INCOLOY®
SS
MTI-3
No
B-45
Corrosive Solutions
2
SS
SS
AREMTS-3
Yes
B-46
2
SS
SS
EMTS-3
No
B-47
2
INCOLOY®
SS
AREMTI-3
Yes
B-48
2
INCOLOY®
SS
EMTI-3
No
B-49
Severely
2
SS
SS
AREMTS-3
Yes
B-50
Corrosive
2
SS
SS
EMTS-3
No
B-51
Solutions
2
INCOLOY®
SS
AREMTI-3
Yes
B-52
2
INCOLOY®
SS
EMTI-3
No
B-53
Light Weight Oil
1
Steel
Steel
ARTMO-1
Yes
B-54
1-1/4
Steel
Steel
MTO-1
No
B-57
2
Steel
Steel
ARMTO-2
Yes
B-58
2
Steel
Steel
MTO-2
No
B-60
2
Steel
Steel
AREMTO-3
Yes
B-61
2
Steel
Steel
EMTO-3
No
B-62
2-1/2
Steel
Steel
ARMTO-3
Yes
B-63
2-1/2
Steel
Steel
MTO-3
No
B-65
Medium Weight Oil
2
Steel
Steel
ARMTO-2
Yes
B-67
2
Steel
Steel
MTO-2
No
B-68
2
Steel
Steel
AREMTO-3
Yes
B-69
2
Steel
Steel
EMTO-3
No
B-70
2-1/2
Steel
Steel
ARMTO-3
Yes
B-71
2-1/2
Steel
Steel
MTO-3
No
B-72
Heavy Weight Oil
2
Steel
Steel
ARMTO-2
Yes
B-73
2
Steel
Steel
MTO-2
No
B-74
2
Steel
Steel
AREMTO-3
Yes
B-73
2
Steel
Steel
EMTO-3
No
B-74
2-1/2
Steel
Steel
ARMTO-3
Yes
B-75
2-1/2
Steel
Steel
MTO-3
No
B-75
Specialty Heaters—
1/2
INCOLOY®
Steel
RI
No
B-79
Water, Oil&
1/2
SS
Steel
RIO
No
B-79
Corrosive Fluids
1/2
INCOLOY®
Brass
RIN
No
B-80
1/2
SS
Brass
RINO
No
B-80
1/2
SS
SS
RIS
No
B-79
3/4
INCOLOY®
Brass
RIN
No
B-80
3/4
SS
Brass
RINO
No
B-80
1
Copper
Brass
TMW-1
No
B-76
1
Copper
Steel
TM-1
No
B-78
1
SS
SS
TMWS-1
No
B-76
1
Steel
Steel
TMO-1
No
B-78
1-1/4
Copper
Brass
TMW-2
No
B-77
2
INCOLOY®
Brass
DWH-MR
Yes
B-81
2
INCOLOY®
Steel
MTO-LT
No
B-82
Note — SS denotes 304 Stainless Steel.

 

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