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Tubular Heaters

Watlow's Tubular heaters, Immersion heaters, Circulation heaters, Screw plug heaters, Flange heaters, Duct heaters, Drum heaters

Watlow's WATROD tubular heater elements and flat FIREBAR elements are designed primarily for direct immersion in liquids such as water, oils, solvents and process solutions, molten materials as well as air and gases. By generating all the heat within the liquid or process, these heaters are virtually 100 percent energy efficient. These versatile heaters can also be formed and shaped into various geometries for radiant heating and contact surface heating applications. UL® and CSA component recognized elements available.

Products Available Sheath Diameters Sheath Materials Maximum Sheath Temperature Typical Maximum Watt Densities*
mm in.
WATROD Tubular® 6.6,
8.0,
9.5, 10.9, 12.0, 12.4, 15.9		 0.260, 0.315, 0.375, 0.430, 0.475, 0.490, 0.625 Inconel® To 871°C (1600°F) To 18.6 W/cm² (120 W/in²), dependent on the sheath material, watt density and heater application
Incoloy® To 871°C (1600°F)
304SS To 650°C (1200°F)
316SS To 871°C (1600°F)
Steel To 400°C (750°F)
Copper To 175°C (350°F)
Single-Ended Tubular 9.5, 10.9, 12.0, 12.4, 15.9 0.375, 0.430, 0.475, 0.490, 0.625 Incoloy® 650°C (1200°F) To 7 W/cm²
(45 W/in²
304SS
High Temperature WATROD 9.5 and 10.9 0.375 and 0.430 Inconel® 600 To 980°C (1800°F) To 4.7 W/cm²
(30 W/in²)
MULTICOIL 12.0 and 12.4 0.475 and 4.90 Inconel® To 871°C (1600°F) To 18.6 W/cm² (120 W/in²), dependent on the sheath material, watt density and heater application
Incoloy® To 871°C (1600°F)
304SS To 650°C (1200°F)
316SS To 871°C (1600°F)
Steel To 400°C (750°F)
Copper To 175°C (350°F)
FIREBAR Flat Tubular 5/8 in.:
5.9 x 16.5		  
0.235 x 0.650		 Incoloy® 760°C (1400°F) To 14 W/cm² (90 W/in²
304SS 650°C (1200°F)
1 in.:
5.9 x 25.7		  
0.235 x 1.010		 Incoloy® 760°C (1400°F)
304SS 650°C
(1200°F)
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*These are typical maximums and vary based on application parameters.

Related Literature, News and Downloads

Click on the below links for more product information. PDF documents require Adobe® Reader® version 7 or higher for viewing.

Specification Sheets & Brochures Size/Pages
Circulation Heaters  97K / 3   (PDF)
WATROD Immersion and Air Heaters  108K / 3   (PDF)
Screw Plug Immersion Heaters  98K / 3   (PDF)
Over-the-Side Immersion Heaters  101K / 2   (PDF)
Flange Immersion Heaters  93K / 3   (PDF)
Multicoil Tubular Heaters  218K / 4   (PDF)
FIREBAR Heaters  304K / 8   (PDF)
Immersion Heaters for the Plastics Industry  63K / 1   (PDF)
Process Heating and Control  2,982K / 16   (PDF)
Duct Heaters  108K / 3   (PDF)
Watlow's Rapid Ship Program for Standard Tubular Heaters  1,494K / 48   (PDF)
EHG SL10 Process Controller and Safety Limit  2,037K / 4   (PDF)
Life Science Thermal Solutions  5,613K / 32   (PDF)
Thermal Solutions for Foodservice Equipment  2,010K / 6   (PDF)
High Temperature Tubular Heater  76K / 2   (PDF)
Packaging Seal Bar Heaters  64K / 2   (PDF)
FIREBAR/Tubular Heaters  283K / 4   (PDF)
Watlow's Heating Solutions For Your Applications  1,357K / 6   (PDF)
316 Stainless Steel Heaters  126K / 2   (PDF)
Thermal Solutions for Photovoltaic Processing Equipment  6,694K / 12   (PDF)
Complete Thermal System Solutions for Plastics Processing  3,509K / 12   (PDF)
Related News Releases and Newsletters Date
Interference Fit Construction Heaters from Watlow® Improve ... 15-Jul-2008
Watlow Opens a New Manufacturing Facility in Shanghai, China 06-Nov-2006
Watlow's FIREBAR Flat Tubular Heater Proves its Superiority Over Round ... 13-Jun-2006
Watlow Introduces RAPID SHIP Program for Standard Tubular Heaters 19-Apr-2006
Watts Current - Volume Twenty-Seven, First Quarter, 2002 21-Mar-2002
Watts Current - Volume Twenty-Two, Second Quarter, 2000 01-Apr-2000
Watts Current - Volume Twenty, Third Quarter, 1999 03-Jul-1999
Watts Current - Volume Eighteen, First Quarter 1999 01-Jan-1999
Related Technical Documents Size/Pages
FIREBAR Flange Heater Installation & Maintenance Manual 61K / 7  (PDF)
FIREBAR Screw Plug Installation & Maintenance Manual 59K / 7  (PDF)
Humidity Conditioning Requirements of Commercial Electric Cooking Appliances ... 26K / 1  (PDF)
ISO 9001:2000 Certification - Hannibal 130K / 1  (PDF)
Thermostat Control Installation & Maintenance Manual 83K / 6  (PDF)
WATROD & FIREROD Installation & Maintenance Manual 49K / 5  (PDF)
WATROD Circulation Heater Installation & Maintenance Manual 65K / 7  (PDF)
WATROD Duct Heater (Module Only) Installation & Maintenance Manual 93K / 8  (PDF)
WATROD Duct Heater Installation & Maintenance Manual 171K / 12  (PDF)
WATROD Flange Heater Installation & Maintenance Manual 58K / 7  (PDF)
WATROD Modular Duct Heater Installation & Maintenance Manual 94K / 8  (PDF)
WATROD Over-the-Side Installation & Maintenance Manual 54K / 6  (PDF)
WATROD Screw Plug Installation & Maintenance Manual 57K / 6  (PDF)
Product Case Histories SIC Code
A Silver Coating For Supplier of Formed Plastic Products to Computer and Stereo ... 3089
Aluminum Ingots Melt Efficiently with Watlow Circulation Heater 3341
An Answer To A High-Temperature Air Application 2821
Circulation Heater Acts As Duct Heater To Raise Chemical Gas To Correct Process ... 2865
Construction Details Make Tubular Heaters For Skin Packaging A Success 3569
FIREBAR Heaters - Where There's Smoke, There's Flavor 2015
FIREBAR Heaters Charge Up Lithium Battery Manufacturing 3692
FIREBAR Heaters Improve Machinery Performance - Maintenance, Too 3089
FIREBAR Heaters Simplify Wiring, Improves Chicken Cooking Performance 3589
FIREBAR Makes Funnel Cakes For The Midway 3589
Formed Tubular Heater Keeps Semiconductor Manufacturer In The Groove 3559
Generator Resistance Load Bank Test Heater 3621
Heater Failure Peppers Salt Bath Performance - Solved With Watlow Tubular Heaters 3567
Heaters Deliver Home Cooked Flavor 3589
Heaters Help Orange Juice Stay Fresh 3565
Screw Plug Heaters Keep Petroleum Products Flowing 2911
Special Material Selection Keeps Screw Plug Immersion Heaters Cleaning Circuit Boards 3679
Total Application Support Solves Circulation Heater Request 3800
Tubular Heaters In Small Packaging System Assures Food Freshness 3565
Tubular Heaters Keep Heat On To Get The Lead Out 3567
Tubular Heaters Keeping Machined Parts Within Tolerances 3549
Tubular Heating Elements Cook Faster, Use less Power 3589
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