Circulation and Process Heaters
Watlow's circulation heaters are compact heating solutions for fluids such as purified and inert gases, supercritical fluids and liquids like de-ionized water for use in semiconductor and electronics industries as well as for general liquid and gas heating applications.
Watlow's industrial process heater lines of immersion, circulation and duct heaters are used to heat a myriad of high and low viscosity fluids ranging form de-ionized and process water, oils, solvents, rinse agents, caustic solutions, etc. to process gases like air, nitrogen, purified and inert gases as well.
| Product | Heater Element Sheath Materials | Body and Vessel Materials | Typical Applications and Watt Densities |
|---|---|---|---|
| CAST-X 500 Circulation Heater | 316SS with cartridge heater | Cast aluminum body with 316SS tubing and a cartidge heater | Indirectly heats gases, liquids and liquid / vapor mixtures up to 3kW. Process temperatures up to 177°C (350°F) operating pressures to 3000 psi |
| CAST-X 1000 Circulation Heater | Copper coated steel cast in aluminum | Cast aluminum body with 304SS cast in process tube | Indirectly heats gases, liquids and liquid / vapor mixtures up to 3kW. Process temperatures up to 121°C (250°F) operating pressures to 1500 psi |
| CAST-X 2000 Circulation Heater | 316SS cast in aluminum | Cast aluminum body with 316SS cast in process tube | Indirectly heats gases, liquids and liquid / vapor mixtures up to 6kW. Process temperatures up to 260°C (500°F) operating pressures to 5000 psi |
| Universal Solvent Circulation Heater | 304SS cast in aluminum | Teflon coated Cast aluminum body. 316SS passivated and electropolished cast in process tube | Indirectly heats gases, liquids and liquid / vapor mixtures up to 8kW. Process temperatures up to 121°C (250°F) operating pressures to 1500 psi. |
| Universal Solvent Circulation Heater | 304SS | Cast aluminum, Teflon® coated | Low flash point liquids, gases up to 1500 psi |
| STARFLOW Circulation Heater | 316LSS | 316L |
Inert gases, liquids 3.9 - 5.4 W/cm² (25 -35 W/in²) |
| Immersion Heaters | Inconel®, Incoloy®, 304SS, 316SS, Steel, Copper | Plugs - 1 to 2½ in. NPT; Brass, Steel, 304SS, 316SS Square Flange - 2½, 318, 4½ in.: Brass, Steel, 304SS, 316SS, Inconel® materials ANSI flange - Class 150 to 1200 lb., 2 - 36 in. size; Steel, 304SS, 316SS, Inconel® materials |
Oils to 4.6 W/cm² (30 W/in²) Water to 15.5 W/cm² (100 W/in²) Gases to 4.6 W/cm² (30 W/in²) Other liquids 1.2 -4.7 W/cm² (8 - 30 W/in²) |
| ASME Immersion Heaters | Inconel®, Incoloy®, 304SS, 316SS, Steel, Copper | ANSI flange - Class 150 to 2500 lb., 2 in - 48 in. size; Steel, 304SS, 316SS, 321SS, titanium, Incoloy®, Inconel® materials |
Oils to 4.6 W/cm² (30 W/in²) Water to 15.5 W/cm² (100 W/in²) Gases to 4.6 W/cm² (30 W/in²) Other liquids 1.2 -4.7 W/cm² (8 - 30 W/in²) |
| Circulation Heaters | Inconel®, Incoloy®, 304SS, 316SS, Steel, Copper | Vessel - Steel, 304SS, 316SS, Inconel® 1 to 2½ in. NPT Screw Plugs; ANSI flange - Class 150 to 1200 lb., 2 - 36 in. size; Steel, 304SS, 316SS, Inconel® materials |
Oils to 4.6 W/cm² (30 W/in²) Water to 15.5 W/cm² (100 W/in²) Gases to 4.6 W/cm² (30 W/in²) Other liquids 1.2 -4.7 W/cm² (8 - 30 W/in²) |
| Engine Preheaters | Copper, Steel, Incoloy® | Vessel - Steel | Up to 100°C (210°F) Up to 13.9 W/cm² (90 W/in²) |
| Over the Side Heaters | Incoloy®, Steel | L-shaped, O-shaped, Drum, Vertical loop |
Viscous fluids, freeze protection 1.2 - 9.3 W/cm² (8 - 60 W/in²) |
| Duct Heaters | Incoloy® | Steel mounting flange/terminal box (insulated): Modular duct 6kW to 2.2 MW (uninsulated) |
Air to 650°C (1200°F) Up to 6.2 W/cm² (40 W/in²) |
Applications
- Oil and gas field equipment
- Refineries and petrochemical plants
- Chemical and industrial gas plants
- HVAC duct heating
- Open tanks and heat treat baths
- Textile drying
- Heat transfer and lube oil systems
- Semiconductor processing equipment
- Precision cleaning equipment
- Power generation systems
- Emissions control systems
- Supercritical fluid heating
- In-line water boilers
Watlow manufactures a variety of tubular heaters and process assemblies including screw plug heaters, flange heaters, circulation heaters, duct heaters, drum heaters, immersion heaters, screw plug immersion heaters and tubular heaters. For more information about tubular heaters and process assemblies consult your local Watlow sales representative.
Featured Articles
Watlow is regularly featured in popular industry trade publications. Below is a selection of recent articles or product features about Watlow. Please click on a link below to view each story.
| Publication | Title |
|---|---|
| Chemical Engineering | "Immersion Heaters: Selection & Implementation" (January, 2006) |
| Laboratory Product News (Canada) | "Electric circulation heaters require proper use, maintenance" (July 2007) |
| Plant Services | "How to Use Immersion Heaters in Chemical Process Applications" (November 2006) |
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 |
|---|---|
| BABY-O Engine Preheater | 39K / 2 (PDF) |
| CAST-X 500 Circulation Heaters | 91K / 2 (PDF) |
| CAST-X SERIES 1000 Circulation Heaters | 7,115K / 2 (PDF) |
| CAST-X SERIES 2000 Circulation Heaters | 142K / 4 (PDF) |
| Cable/Coil Heaters | 84K / 2 (PDF) |
| Circulation Heaters | 97K / 3 (PDF) |
| EHG SL10 Process Controller and Safety Limit | 2,050K / 4 (PDF) |
| Engine Heaters and Systems | 178K / 4 (PDF) |
| Integrated Thermal Solutions for Challenging Applications | 1,888K / 12 (PDF) |
| Modular Duct Heater | 124K / 4 (PDF) |
| Process Heating and Control | 2,982K / 16 (PDF) |
| Starflow Circulation Heaters | 45K / 2 (PDF) |
| UNIVERSAL SOLVENT Circulation Heaters | 8,183K / 2 (PDF) |
| Related News Releases and Newsletters | Date |
|---|---|
| The CAST-X 500 Circulation Heater from Watlow® Is Ideal ... | 15-Jul-2008 |
| Watlow Offers Immersion and Circulation Heaters Compliant to ATEX Directive | 11-Oct-2006 |
| Watlow Introduces its i-Catalog, an Interactive Online Product Catalog | 07-Mar-2006 |
| New CAST-X 2000 Circulation Heaters Are Ideal For Demanding Applications | 06-Feb-2006 |
| Watlow's UNIVERSAL SOLVENT Circulation Heater Operates at High Efficiency ... | 08-Jun-2004 |
| Watlow's New CAST-X SERIES 1000 Circulation Heaters Provide Optimum Temperature ... | 08-Jun-2004 |
| Watlow Specializes in Custom-Engineered Coolant Preheaters | 25-Mar-2002 |
| Product Case Histories | SIC Code |
|---|---|
| Car Manufacturer Heats with Watlow Circulation Heater | 3714 |
| Watlow Circulation Heater Hands Fruit Processing a Better Deal. | 2891 |
PDF documents require Adobe® Reader® version 7 or higher for viewing.
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