All Swift assemblies are produced under the most stringent quality control conditions. Checkpoints are established for every step of production from selection of raw materials to final packaging. Thermocouple/RTD Thermowell Assemblies consist of a temperature sensor such as a porcelain insulated element, sheathed (Q-Pak) element, or an RTD, protected by a high quality drilled thermowell. These assemblies are supplied complete with terminal block, head, and nipple or union and nipples, offers temperature sensors with a large variety of thermowells capable of withstanding many severe applications. The engineering staff is available to assist you in selecting the most effective assembly for your particular application.
Well Material Temperature
Range
Carbon Steel 1000°F
304 Stainless Steel 1200°F
31 6 Stainless Steel 1200°F
Inconel 1400°F
Brass 600°F
Chrome-Moly Steel* 1200°F
Hastelloy-B &C 1000°F
*F-11 and F-22 Grade  
Interchangeability for
RTD Assemblies
Temp°F l ±°F ±Ohms
-328 2.16 .50
-148 1.26 .30
32 54 .10
212 1.26 .25
392 2.16 .45
572 3.24 .65
752 4.5 .85
932 5.4 1.00


Suggested Protection Tube Material
Industry

 








Heat
Treating

Application Standard Specials
(Consult Factory)
Annealing: up to 1200°F Carbon Steel/Wrought Iron/Yoloy  
over 1200°F 310S.S Incoloy
Carburizing Inconel  
Hardening :up to 1200°F Carbon Steef/Wrought Iron/Yoloy  
  :1200° to2000°F   Incoloy
  :over 2000°F Mullite  
Lead 446S.S. (Drilled)  
Nitriding   Incoloy
Salt Baths :Cyanide Inconel Incoloy
  :Neutral 446S.S, Mullite  
  :High speed 446S.S, Mullite  
Iron
and
Steel 		Open Hearth 310S.S, 446S;S Incoloy
Billet Heating, Brazing, Patenting, Butt-Welding, Slab Heating :X up to 2000°F LT-1. 446 S.S. Incoloy
  :over 2000°F Mullite,Silicon,Carbide  
Bright Anneal :Batch Unprotected  
  :Continuous Mullite,Silicon,Carbide  
Foundry   Quartz
Forging Mullite,Silicon,Carbide  
Soaking Pits :up to 2000°F 310S.S.  
  :over 2000°F Mullite,Silicon,Carbide  
Vacuum Melting :up to 10:3400°   Aluminum Oxide
  :up to 4000°F   Beryllium Oxide
Non-Ferrous Aluminium Cast iron, Silicon Carbide  
Brass or Bronze 446S.S.  
Lead 446S.S. (Drilled)  
Magnesium Carbon Steel/Wrought Iron, Yoloy  
Tin Carbon Steel/Wrought Iron, Yoloy  
Zinc Carbon Steel, Wrought lront Yoloy 446S.S., Silicon Carbide  
Die Casting Cast Iron, Silicon Carbide  
Smelting 310S.S.,446S.S,Inconel, Mullite,Silicon Carbide  
Cement Flues 310S.S.,446S.S  
Ceramics
and
Refractories		 Kilns: continuous Mullite, Silicon Carbide  
periodic 310S.S., Inconel, Mullite,Silicon,Carbide  
Chemical
and
Petroleum 		Various Carbon Steel, Wrought Iron, Yoloy,304S.S. 316S.S  
Glass Lehrs Carbon Steel, Wrought Iron, Yoloy  
Tanks: crown Mullite  
flues 310S.S. 446S.S. Inconel  
Power Flue Gases Carbon Steel, Wrought Iron,Yoloy, 446S.S.  
Preheaters Carbon Steel, Wrought Iron,Yoloy, 304S.S.  
Steam Lines Carbon Steel, Wrought Iron,Yoloy, 304S.S.  
Water Lines Carbon Steel, Wrought Iron,Yoloy, 316S.S  
Gas
Producers 		Flues and Stacks 310S.S  
Incinerators Flues and Stacks 310S.S. , 446S.S  

Metallic
Material Composition Construction Maximum Temp. (°F)
Oxidizing Atm Reducing Atm.
Carbon Steel Wrought Iron Yoloy 98% Fe Drawn 1000 1000
304S.S. 18%Cr,8%Ni, balance Fe Drawn 1800 1800
310S.S.(Hiqualoy) 26%Cr,22% Ni, 2%Mn,11/2%Sibalance Fe Drawn 2100 1950
316S.S. 18%Cr,8%Ni, 2% Mo, balance Fe Drawn 1800 1800
446S.S(Repelheat) 28%Cr balance Fe Drawn 1800 1800
Inconel 80% Ni, 14% Cr Drawn 2000 2100
Kanthal 22% Cr ,5% Al, balance Fe Drawn 2200 2200
Cast Iron 99% Fe Cast 1300 1600
Nickel Ni Drawn 2000 1900

Aplication Notes for table above
Carbon Steel Wrought Iron Yoloy Non-Corrosive liquid and gas applications
304S.S. Good resistance to oxidation and corrosion; (Welded parts must be heat-treated to restore corrosion resistance.)
310S.S. (Hiqualoy) Superior resistance to corrosion and oxidation. Excellent all-around material
316S.S Good resistance to corrosion, (Better resistance to attack by chernicals than 304 S.S.)
446S.S(Repelheat) Sulphurous atmospheres, salt baths and molten metal applications
Inconel Good resistance to corrosion at high temp. Excellent resistance to oxidation at high temp Do not use in the presence of sulphur above 10000F
Kanthal A Good resistance to sulphides in oxidizing atmospheres. Molten copper applications
Cast Iron Molten aluminum applications
Nickel Excellent resistance to attack by many chemicals at high temperatures. Do not use in the presence of sulphur above lOOO°F..
Ceramic
Material Composition Construction Maximum Temp. (°F)
Oxidizing Atm Reducing Atm.
Mullite 60% Al O3
38% Si O2		 Molded or Cast 3000 3000
High-Purity
Alumina 		99% Al2 O3 Molded or Cast 3400 3400
Silicon
Carbide
Si O2, C Molded or Cast 3000 3000
LT-1 Cr, Al2, O2 Molded 2600 2600

Aplication Notes for table above
Mullite Excellent resistance to thermal shock. Fair mechanical strenth.
High-Purity
Alumina 		Fair resistance to thermal and mechanical shock
Silicon
Carbide
For continious use in molten aluminum. Secondary protection for resistance to thermal and mechanical shock.
LT-1 Excellent resistance to sulphides. Good resistance to thermal and mechanical shock.

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