Registered Quality System to ISO 9001:2008
52/60
Form 912
sorinc.com
913-888-2630
There are two sections to the chart, Steam Heat and Dry Heat. Fundamental differences in condensing
(steam) and non-condensing (dry) heat require different methods of protection.
Steam Heat processes carry it’s heat with the vapor. These processes effectively heat every portion of their
enclosure. To reduce the heat effects of condensing processes, we must either condense or physically block
the vapor. SOR uses a condensing system to avoid the sealing problems associated with blocking the steam.
Dry Heat processes transfer heat through direct conduction. Heat is only passed to the areas where they
touch the enclosure. Therefore, radiant heat is the only concern with these processes. This may be resolved by
adding distance between the process and the protected portion of the control.
To use the selection chart, first select the column that represents the desired maximum temperature. Select
a chamber material that is allowable in the chosen column. Move down to the proper process type section,
Steam Heat or Dry Heat. Within that section, select a switch mechanism from those listed in the chosen
column. The symbol will indicate if a temperature reduction device is required.
High Temperature Selection
High Temperature Selection Chart
Mechanical
Level Switches
≤ 600
o
F(316
o
C)
≤ 650
o
F (343
o
C)
≤ 700
o
F (371
o
C)
≤ 800
o
F (427
o
C)
≤ 850
o
F (454
o
C)
≤ 900
o
F (482
o
C)
≤ 950
o
F (510
o
C)
≤ 1000
o
F (538
o
C)
0-400
o
F (204
o
C)
≤ 450
o
F (232
o
C)
≤ 550
o
F (288
o
C)
≤ 750
o
F (399
o
C)
≤ 500
o
F (260
o
C)
Designator
A106B Carbon Steel
304/304LSS
316/316LSS
A
C
A333 GR.6
A335-P11 Chrome Moly
A335-P91
Hastelloy C
Alloy-20
Monel-400
Steam Heat Applications
Switch Mechanism (Select one)
Hi-Temp Dry Contact
or Mini-Hermet
Hi-Temperature Ceramic/SS
B/V
Y
v
v
v v
v
v
v v v
v
Dry Heat Applications
Switch Mechanism (Select one)
Hi-Temp Mini-Hermet
or Dry Contact
B/V
Hi-Temperature Ceramic/SS
Y
For proper cooling, temperature extensions and finned extensions must not be insulated or placed inside an enclosed structure. High ambi-
ent temperatures (over 100ºF/38ºC), intense direct sunlight or heat loading from adjacent piping or vessels will affect cooling
performance. Consult the factory if any of these conditions exist.
Features
Chamber Material (Select one)
≤ 1050
o
F (566
o
C)
≤ 1100
o
F (593
o
C)
≤ 1150
o
F (621
o
C)
≤ 1200
o
F (649
o
C)
= Switch Only v = Finned Extension = Temperature Extension
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