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
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.
|
Download the Screw Plug Immersion Heaters Selection Guidelines