Double-Ended Tubular Heating Tubes: The Industry Standard for Versatility
Double-Ended Tubular Heating Tubes: The Industry Standard for Versatility
| Technical Specifications | Range / Typical Values |
| Voltage Range | 110V / 220V / 380V |
| Power Range | 100W – 15kW |
| Resistance Range | 10Ω – 800Ω |
| Current Range | 1A – 40A |
| Surface Load | Liquid: 6–12W/cm2 / Air: 2–4W/cm2 |
Infinite Formability: These tubes can be factory-bent into virtually any shape—circular, “U” shape, “W” shape, or complex 3D serpentine patterns—to fit the specific geometry of your equipment or tank.
Uniform Heat Profile: Because the resistance wire runs the entire length of the tube between the two terminals, these elements provide exceptionally consistent heat output along the heated length.
Robust Mechanical Strength: The compaction process creates a rock-solid internal structure, making these heaters highly resistant to mechanical shock and vibration.
Dual-Terminal Wiring: Having terminals at both ends simplifies wiring in certain applications, such as large ovens or duct systems, where electrical connections are required on both sides of a chamber.
| Feature | Industrial Grade | High-Temperature Grade |
| Sheath Materials | Copper, Steel, 304/316 SS | Incoloy® 800/840, Inconel® |
| Standard Diameters | 6.5mm, 8mm, 10mm, 12.5mm, 16mm | Custom diameters available |
| Max Sheath Temp | 1200°F (650°C) | Up to 1600°F (870°C) |
| Termination Styles | Threaded Stud, Spade, Lead Wire | Ceramic-to-Metal Hermetic |
Immersion Heating: When bent into a “U” shape and welded to a flange or screw plug, they heat water, oils, and chemical baths.
Radiant Heating: Used in industrial “salamander” heaters, shrink tunnels, and comfort heating for outdoor spaces.
Mold & Platen Heating: Formed and pressed into grooves in metal plates or “cast-in” to aluminum or bronze blocks.
Food Service Equipment: Used in deep fryers, steam tables, and commercial ovens.
Process Air Heating: Arranged in banks for use in duct heaters and forced-air drying systems.
At Runkel, we don’t just manufacture heating tubes; we provide thermal solutions. Our core strength lies in our unmatched customization capabilities.
Whether you are a researcher needing 1–2 prototype samples for a new project, or a maintenance manager looking to replace a discontinued or aging heating element in your existing machinery, we deliver perfect-fit solutions with no minimum order hurdles.
“From 1 unit to 1,000—we treat every prototype with production-grade precision.”
Engineering Review: Our team verifies the power density and material compatibility for your application.
Agile Production: Your custom order enters our flexible production line immediately.
Quality Assurance: Every unit undergoes rigorous insulation and leakage current testing before shipping.