WATROD™ and FIREBAR® Screw Plug Immersion Heaters
Screw plug immersion heaters are ideal for direct immersion heating of liquids, including all types of oils and heat transfer solutions.
Available in a variety of sizes, Watlow® screw plug immersion heaters feature both WATROD™ round and FIREBAR® flat tubular elements.
Heating elements are hairpin bent and either welded or brazed into the screw plug —depending on element sheath and plug material compatibility.
General purpose (NEMA 1) terminal enclosures are standard; with optional moisture resistant (NEMA 4), explosion resistant (NEMA 7) and explosion/moisture resistant (NEMA 7/4) enclosures available to meet specific application needs.
Optional thermostats provide convenient process temperature regulation to the screw plug immersion heater.
- Specifications
- Applications
- Features & Benefits
- Literature & Downloads
- Images
Specifications:
| Material | Maximum Operating Temperatures | Maximum Watt Densities | ||
|---|---|---|---|---|
| °F | °C | W/in2 | W/cm2 | |
| Incoloy® | 1600 | 870 | 120 | 18.6 |
| Stainless steel | 1200 | 650 | 120 | 18.6 |
| Steel | 750 | 400 | 120 | 18.6 |
| Copper | 350 | 175 | 120 | 18.6 |
- Watt densities to 120 W/in2 (18.6 W/cm2)
- Wattages to 38 kilowatts
- UL® and CSA component recognition to 480VAC and 600VAC respectively
- Incoloy® sheath temperatures to 1600°F (870°C)
- Passivated 316 stainless steel sheath temperatures to 1200°F (650°C)
- 304 stainless steel sheath temperatures to 1200°F (650°C)
- Steel sheath temperatures to 750°F (400°C)
- Copper sheath temperatures to 350°F (175°C)
Applications:
- Deionized water
- Deionized water
- Clean water
- Potable water
- Process water
- Industrial water rinse tanks
- Vapor degreasers
- Hydraulic oil, crude, asphalt
- Lubricating oils at API specified watt densities
- Air and gas flow
- Caustic solutions
- Chemical Baths
Features & Benefits:
| Features | Benefits |
|---|---|
| A variety of element sheath and screw plug materials |
|
| Integral thermowells |
|
| Terminal enclosures |
|
| Welding or brazing WATROD and FIREBAR elements to the screw plug |
|
| WATROD hairpins are repressed (recompacted) |
|
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Related Literature
Specification Sheets (13)
Brochures (6)
User Manuals (11)
Engineering Bulletins (1)
Quality Certificates (1)
Catalogs (5)
Images:
WATROD and FIREBAR Screw Plug Immersion Heaters |
WATROD and FIREBAR Screw Plug Immersion Heaters |