Cable Heaters
Coiling Bending and other Geometrical Formations
The versatile Watlow Cable Heater can be formed into a variety of shapes to fit many applications. These small diameter, high performance units come in Inconel® and stainless steel sheaths, with either round or rectangular cross sections, in lengths up to 72 inches (1830 mm). They feature optional thermocouples and are fully annealed and readily bend to your desired configuration.
| Cable Heater Type | Maximum Watt Density | Maximum Operating Temperature |
| Cable | 30 W/in² (4.65 W/cm²) | 1200 °F (650 °C) |
| Coiled Nozzle | 106 W/in² (16.4 W/cm²) | 1200 °F (650 °C) |
| Mini-Cable Nozzle | 40 W/in² (6.2 W/cm²) | 1200 °F (650 °C) |
Applications:
- Extruders
- Plastic Injection Molding Nozzles
- Semiconductor Manufacturing
- Sealing & Cutting Bars
- Medical, Analytical & Scientific Instruments
- Restaurant & Food Service Equipment
- Cast-in Heaters
- Gas Heating
Coiling Bending and other Geometrical Formations
The versatile Watlow Cable Heater can be formed to a variety of shapes as dictated by its many applications. Cable Heaters are small diameter, high performance units, fully annealed and readily bent to your desired configuration.
The heater can be formed into a compact coiled nozzle heater for use on plastic injection molding equipment supplying a full 360 degrees of heat with optional distributed wattage. A straight cable can snake through a sealing bar in packaging equipment. A flat spiral configuration is used in semiconductor manufacturing while a star wound cable is used in air and gas heating.
The different applications require different construction methods, including one, two, three or four resistance wires; parallel coil or straight wire; drawn or swaged sheaths; with or without internal thermocouples; leads exiting from one or both ends, and round, rectangular or square cable.
Whatever the application, the Watlow Cable Heater can be shaped to fit your ideas.
Performance Capabilities:
- Continuous Operating Temperatures up to 1200 °F (650 °C) with Intermittent Operating Periods Achieving up to 1500 °F (815 °C)
- Sheath Watt Densities on Cable up to 30 W/in (4.65 W/cm) & as High as 75 W/in (11.62 W/cm) (within factory approved conditions)
Features:
- High ductility allows the heater to be cold formed into almost any shape.
- The heaters low mass allows for quick response to both heating and cooling.
- The heater can be isolated or sealed from the process environment with optional compression fittings or HTF adaptor seals. Cable heaters are constructed with no open seams. Optional testing is available to guarantee the integrity of all surfaces and seams.
- Standard 304 stainless steel or optional Inconel® 600, provide high temperature corrosion and oxidation resistance along with ideal thermal expansion properties.
- The heater sheath can be brazed allowing the permanent attachment of mounted fittings to the heater or the heater to the application process hardware.
Coiled Nozzle
The Watlow Coiled Nozzle heater features a five-inch long no-heat tail section. This design advantage eliminates failures in the adaptor area due to overheating.
Performance Capabilities:
- Low profile construction provides easy installation in the tight environment of multiple-gate molds.
- The no-heat tail section reduces temperature at the adaptor, eliminating failures due to overheating.
- The single tail with dual lead feature occupies less space in the wire raceway.
- Heat is conducted from the entire 360 degree circumference for even heating.
- Externally welded thermocouples to the sheath provide optional temperature measurement capabilities.
- Stocked sizes are available for same day shipment.
Mini-Cable Nozzle
The 0.058 inch Mini-Cable Nozzle heater provides "worry-free" heat for hot runner systems. The heater features a no-heat tail section, and the adaptor has a moisture resistant, hermetic seal to virtually eliminate failures due to moisture contamination and overheating in the seal area. An axail access clamp provides easy installation.
Performance Capabilities:
- Sheath Temperatures up to 1200 °F (650 °C) Continuously & 1500 °F (815 °C) Intermittent
- Watt Densities up to 40 W/in
- Wattage Tolerance of 5%
Features:
- Five-Inch no-heat tail section prevents overheating failure in transition area.
- Hermetic seal prevents moisture in adaptor area.
- 304 Stainless steel axial access clamp provides easy installation.
- Heat is conducted from the entire 360 degree circumference for even heating.
- Externally welded thermocouples provide optional temperature measurement capabilities.
- 72 inch Teflon® Lead Wire
K-RING®
Watlow's K-RING® heater takes nozzle heater technology a step ahead of the competition. Thanks to its innovative design, plastic molders no longer have to compromise with sloppy fit tolerances, uneven temperature profiles or short heater life.
Featuring a machined brass casting construction, the K-RING® heater can handle very high temperatures while providing maximum heat transfer.
The K-RING® heater fits perfectly, with a precision machined inside diameter, and it doesn't even require clamping bands. Precision fit, along with the excellent thermal conductivity of brass, allow the K-RING® to give you an extremely even temperature profile.
Performance Capabilities:
- Operating Temperatures up to 650 °C (1200 °F)
- Maximum Watt Densities on Inside Diameter up to 40 W/cm (260 W/in)
- Maximum Voltages up to 240 V ~(ac)
Features:
- Brass casting construction protects the heater from damage, as well as maximizes transfer of heat to heated parts.
- Precision machining of length and inside diameter gives precision fit tolerances.
- Sealed construction of the heater body eliminates contamination. The adaptor also effectively seals the lead exit.
- Stainless steel outer casing protects the brass heater body, and as an option, can be polished to increase heater efficiency.
- Distributed wattage allows heat to be precisely placed for an even temperature profile.
- Customized diameters with quick delivery are available to meet specific application needs.
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