APPLICATION GUIDE FOR:
Heating Liquid and viscous materials in process tank :
|
Type
of
Process Tank |
Sheath
|
Operatting
Temp. |
Permisable
Watt Density
|
Heaters
|
|||
|
°F
|
°C
|
W/cm²
|
W/In²
|
||||
|
WATER
|
Copper
|
212
|
100
|
8.5
|
55
|
Screw-plug
immersion heaters
Over-the-side immersion heaters Circulation heaters. Round-flange immersion heaters Tubular with thru-wall fitting. |
|
|
Clean
water
(delonized) |
Stainless
steel
(Passivated) |
212
|
100
|
8.5
|
55
|
Screw-plug
immersion heaters
Circulation heaters. Round-flange immersion heaters. Circulation heaters. |
|
|
Machine
oil
Oil draw bath |
steel
|
250
|
121
|
3.41
|
22
|
Any
of the above heater types.
|
|
|
Heat
transfer fluids
oils, Therminol®, |
steel
|
600
|
316
|
3.41
|
22
|
Round-flange
immersion heaters.
|
|
|
Dowtherm
A®
Dowtherm E® |
steel
|
400
|
204
|
1.7
|
11
|
Circulation
heaters.
|
|
|
Viscous
Materials
Asphalt |
steel
|
450
|
232 |
0.77
|
5
|
Pipe-insert
heaters (indirect heating).
|
|
|
Heavy
oil
fuel oil |
steel
|
180
|
82
|
1.7
|
11
|
Screw-plug
immersion heaters
Round-flange immersion heaters.Over-the-side immersion heaters Deep-tank immersion heaters. |
|
|
Paraffin
|
steel
|
150
|
66
|
1.7
|
11
|
Screw-plug
Deep-tank heaters, Riser must be heated to allow expansion of melted material through solid surface. protect electrical terminations from paraffin creepage.Tubular with thru-wall fittings |
|
|
Hot-melt
adhesives,
glue |
-
|
-
|
-
|
-
|
Indirect
heating with circulating hot oil
circulation heater and jacket Strip or tubular heaters clamped to outside of jacket. |
||
|
Food
and Cosmetic
Products Water for cooking, preheating, or rinsing. |
Nickel
plated
Copper or Stainless steel (Passivated) |
212
|
100
|
8.5
|
55
|
Screw-plug
immersion heaters Round-flange immersion. |
|
|
Oil
, Vegetable |
Stainless
steel
(Passivated) |
400
|
204
|
3.41
|
22
|
Over-the-side
immersion heaters
Circulation. Tubular with thru-wall fittings |
|
|
Deep-fat
frying
|
Stainless
steel
(Passivated) |
400
|
204
|
3.41
|
22
|
Direct
heating with tubular elements with thru-wall fittings.
Indirect heating with tubular in pipes or hot oil circulated through pipes. |
|
|
Viscous
materials
hard |
Stainless
steel
(Passivated) |
-
|
1.7
|
11
|
Strips
curved to drum diameter
Deep-tank heaters.Indirect heating. |
||
|
Molasses,
chocolate,
Lipstick |
Copper
|
100
|
38
|
Indirect
heating with hot water circulated through heat exchanger.
|
|||
|
Metalworking
Vapor degreasing |
Steel
|
200
|
93
|
3.41
|
22
|
Screw-plug
immersion heaters.
flange immersion heaters.
|
|
|
Corrosive
materials-
cleaners (caustic soda,Oakite® ) |
Follow
suppliers
recommendation |
200
|
93
|
3.41
|
22
|
Screw-plug
immersion flanged immersion. Tubular with thru-wall fittings Over-the-side immersion. |
|
|
Finishing
acids
Plating compounds Phosphatizing |
Follow
suppliers
recommendation |
180
|
82
|
3.41
|
22
|
Over-the-side
immersion
Indirect heating-recirculated hot water through plastic tubing or plastic-coated heat exchanger.Tubular with thru-wall fittings. |
|
|
Hydrofluoric
acid
Solutions |
-
|
-
|
-
|
-
|
Indirect
heating-recirculated hot water through plastic tubing
Cannot use any metal glass or quartz sheath. |
||
|
Molten
salt
For heat-treating metals, vuicanizing Sodium or potassium chlorides Commercial heat-treating salts |
Nickel
|
800
- 950
|
427
- 510
|
3.45
|
22-30
|
Tubular
element with fittings; risers must be heated to allow
expansion of melted material through solid surface. Requires high temperature wiring. Hermetic terminal seals suggested for protection against ambient salt vapor. |
|
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