ACI-Automation Components THERMOWELLS Data Sheet
Automation Components, Inc.
THERMOWELLSACCESSORIES
Fabricated Thermowells
Machined Thermowells
THERMOWELLS
Thermowells & Thermal Grease
The ACI Thermowell Series comes in various lengths and materials. The standard material is 304
stainless steel which ensures long lasting reliability and stability. The entire series is milled to high tolerances, so there is a negligible gap between the thermowell sheath and the probe. This provides maximum heat
transfer when used with a corresponding ACI sensor. For fabricated (welded) thermowells, the sheath is set
into the nut and then automated TIG welded from its own material to provide the strongest possible joint.
For machined wells, the wells are machined from solid bar stock using advanced CNC machinery.
Automation Components, Inc.
221
ACCESSORIES THERMOWELLS
SPECIFICATIONS
Process Thread
Instrument Thread
1/2” NPT (National Pipe Taper)
1/2” NPS (National Pipe Straight)
Automation Components, Inc.
MAXIMUM PRESSURE
Material
Fabricated (Welded)*
Machined SS 304
Temperature 70oF
1600 psi
7000 psi
o
F
200
1500 psi
6000 psi
o
F
400
1400 psi
5600 psi
o
F
600
1200 psi
5400 psi
o
F
800
1000 psi
5200 psi
o
F
1000
900 psi
4500 psi
o
1200
700 psi
1600 psi
MAXIMUM FLUID VELOCITY
Material
Machined SS 304
Thermowell Lengths
Steam, air, gas & fluids with similar density
Water flow (safe values)
2.5”
300 ft/sec
148 ft/sec
4”
109
82.2
6”
39.5
----
10”
20.1
----
12”
12.2
----
18”
5.9
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ORDERING
Please select one Thermowell Type (A). NOTE: *Fabricated (welded) thermowells are not intended for moving water or high pressure service.
Fluid velocity and wake frequency are primary factors in well failure. Machined thermowells should be used in these types of applications.
Fabricated thermowells are intended for tank, or low to no flow, applications.
Thermowell Type
A/2.5”
(2.5” Thermowell) (Fabricated)*
(4” Thermowell) (Fabricated)*
A/4”
(6” Thermowell) (Fabricated)*
A/6”
(Machined 304 Stainless Steel 2.5”)
A/M2.5”
(Machined 304 Stainless Steel 4”)
A/M4”
(Machined 304 Stainless Steel 6”)
A/M6”
(Machined 304 Stainless Steel 12”)
A/M12”
(Machined 304 Stainless Steel 18”)
A/M18”
(Machined 304 Stainless Steel 24”)
A/M24”
(-40-400oF) (Silicone Grease, 5.0 OZ)
SG
(-40-392oF) (Non-Silicone Grease, 2.0 OZ)
NSG
F
24”
3.1
----
BUILD PART NUMBER
After completing (A) from the above table, fill in the Part Number Table below. An example part number is offered.
EXAMPLE: A/M12”
222
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