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375 HIGH-TEMPERATURE STRIP HEATERS
RUGGED HEATER CAPABLE OF HIGH TEMPERATURES AND HIGH WATT DENSITIES
Named for its 0.375 in. (9.5 mm) thickness, the rugged Watlow 375 strip heater is capable of both high temperatures and high watt densities.
Watlow begins construction by accurately placing a coiled, nickel-chromium element wire in the center of the heater. The element wire is then embedded in magnesium oxide (MgO)-based insulation compacted into a solid mass creating excellent heat conductivity and high dielectric strength. The heater is then enclosed in aluminized steel or 430 stainless steel sheathing.
- Nickel-chromium element wire is centered in the heater assures uniform heat
- Aluminized steel sheath operates at higher temperatures and resists corrosion
- Optional 430 stainless steel sheath meets temperature requirements that reach up to 1200°F (650°C)
- Over 100 in-stock models in popular sizes and ratings for next-day shipment
- UL® approved to 240VAC (File No. E52951) and CSA approved to 600VAC (File No. LR7392)
Material Maximum Operating TemperaturesF°C°Maximum Watt DensitiesW/in2W/cm2Aluminized Steel 1100 595 100 15.5 -
1/8-INCH FIREROD® CARTRIDGE HEATERS
The Watlow FIREROD not only set the industry standard for cartridge heaters, it continues to make improvements in construction and design. Among these innovations is the 1/8-inch FIREROD. This miniature cartridge heater with swaged construction features high watt density, is capable of high operating temperature and provides long life in applications where it is essential to have a very small size. Like all of Watlow’s other FIRERODs, the 1/8-inch contains a resistance wire closer to the sheath and compacted MgO insulation, which maximizes heat transfer.
- Miniature size
- Low mass
- Swaged construction
- Numerous lead options available
- Outlasts competitors in life testing
MINIATURE SIZE
Delivers high performance in a small package and supports a wide variety of application requirementsLOW MASS
Offers better heat transfer, quicker response time and increased heater life due to lower internal temperatureSWAGED CONSTRUCTION
Higher watt density and temperature capabilities, maximum heat transfer and increased safety due to low leakageOPTIONAL INTERNAL THERMOCOUPLE
Reduces system footprint and measures temperature at point of applicationMANUFACTURED TO THE HIGHEST QUALITY STANDARDS
Backed by 50 years of industry expertise and outlasts competitors in life testingNUMEROUS LEAD OPTIONS AVAILABLE
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375 FINNED STRIP HEATERS
EFFICIENTLY CONDUCTS HEAT FROM NICKEL-CHROME ELEMENT WIRE TO THE SHEATH
Watlow’s 375 finned strip heaters are constructed of highly-compacted MgO-based insulation, which conducts heat efficiently from the nickel chromium element wire to the sheath. Two-inch wide (51 mm) aluminized steel fins are attached in a way that maximizes surface contact so heat is transferred into the air faster. Lower sheath temperature and element life are all maximized by this finned construction.
Finned strip heaters com in available lengths from 5 1⁄2 to 48 in. (140 to 1220 mm).
- Nickel chromium element wire is centered for heat uniformity
- Aluminized steel sheath operates at higher temperatures and reduces corrosion
- Optional 430 SS sheath provides a solution for extreme corrosive environments
- Welded post terminals produces strong connections
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POLYIMIDE HEATERS
POLYIMIDE MATERIAL OFFERS STRENGTH, TEAR RESISTANCE AND STABILITY
Polyimide is a thin, lightweight organic polymer film which provides excellent tensile strength, tear resistance and dimensional stability. This heater is ideal for applications requiring low outgassing in a vacuum, or resistance to
radiation, fungus and chemicals. Polyimide is also solvent resistant.- Excellent physical and electrical properties results in thermal stability over a wide temperature range
- Transparent polyimide material allows inspection of internal details
- Resistance of radiation and fungus allows it to be used in a wide range of applications
Material Maximum Operating TemperaturesMaximum Watt DensitiesPolyimide 392F° 200C° 50W/in2 7.75W/cm2 Read More > Flexible Heaters pdf
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PUMP AND GAS LINE HEATING SYSTEMS
INCREASE TOOL UPTIME AND PROCESS YIELDS
Watlow’s gas line heaters are designed to regulate temperatures in gas lines in order to prevent condensation in the gas line.
Tetraethyl orthosilicate (TEOS), boron trichloride (BCl3), aluminum chloride (AlCl3), chlorine trifluoride (ClF3) and dichlorosilane (DCS) are gases that condense or liquefy due to a phase shift at low temperatures. In semiconductor processes, the condensation occurs in the gas line and puddles in the shower head before being injected into the vacuum chamber. A substantial number of wafer defects will occur if liquefied gases are injected into the vacuum chamber. Uniform heating of the lines with gas line heaters will prevent condensation. TEOS lines are typically heated above 194°F (90°C) and BCl3 above 86°F (30°C), depending on pressure and flow rate. The optimum line temperature will vary depending on the process parameters.
- Easy to install two part system which conveniently fits on most gas line configurations
- Flexible heater design gives engineers the flexibility to easily customize the thermal profile for each gas line application and allows quick prototyping to determine energy distribution requirements for process improvement
- Flexible standard system components eliminates unnecessary lead times for custom designs
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SILICONE RUBBER HEATERS
IMPROVE HEAT TRANSFER, SPEED WARM UPS AND DECREASE WATTAGE REQUIREMENTS
Watlow silicone rubber heaters are rugged, yet thin, lightweight and flexible. Use of these heaters is limited only by the imagination. Heat can be put where it is needed. These silicone heaters improve heat transfer, speed warm ups, and decrease wattage requirements.
Fiberglass-reinforced silicone rubber gives the heater dimensional stability without sacrificing flexibility. Because very little material separates the element from the part, heat transfer is rapid and efficient. The silicone rubber heaters are constructed with a wire-wound element or an etched foil element. The heater construction creates a very thin heater allowing it to fit applications where space is limited.
- Designed to the exact shape and size needed which conforms to the component and/or equipment
- More than 80 designs available immediately from stock reduces downtime
- Constructed with wire-wound or etched foil elements provides the desired flexibility for many dynamic applications and delivers low mass and easily repeatable distributed watt densities
- Moisture and chemical-resistant silicone rubber material provides longer heater life
- Vulcanizing adhesives or fasteners allows heaters to be easily bonded to parts
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FIREBAR® SINGLE/DOUBLE-ENDED HEATERS
FIREBAR heating elements provide added heating performance over standard round tubular heating elements—especially for immersion applications in petroleum-based liquids requiring high kilowatts.
The FIREBAR’s unique flat surface geometry packs more power in shorter elements and assemblies, along with a host of other performance improvements. These include:
-Minimizing coking and fluid degrading
-Enhancing the flow of fluid past the element’s surface to carry heat from the sheath
-Improving heat transfer with a significantly larger boundary layer allowing much more liquid to flow up and across the sheath’s surface
FIREBAR elements are available in single- and double-ended constructions with one inch or 5⁄8 inch heights. These two configuration variables make it possible to use FIREBAR elements instead of round tubular elements in virtually all applications.FINBAR is a special version of the one inch, single-ended FIREBAR. FINBAR is specially modified with fins to further increase surface area for air and gas heating applications.
- 70 percent greater surface area per linear inch compared to a 0.430 in. (11 mm) diameter round tubular heater
- Compacted MgO insulation maximizes thermal conductivity and dielectric strength
- Precision wound nickel-chromium resistance wires
- 0.040 in. (1 mm) thick MgO walls transfer heat more efficiently
- Three resistance coil design readily adapts to a variety of electrical sources and wattages outputs
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FIREROD® IMMERSION HEATERS
COMPACT HEATER ENABLES VERSATILE HEATING SYSTEM DESIGN
FIREROD water immersion heaters are ideal for replacing large screw-plug immersion heaters. Because of its compact size the product can be very versatile when designed into a heating system.
These water immersion heaters come complete with a brass 3⁄4 inch National Pipe Thread (NPT) double threaded fitting, which allows you to add conduit boxes. Also, FIREROD immersion heaters are sealed at the lead end with a silicone rubber seal.
Solid copper leads, with silicone rubber sleeves, are provided for unrestricted wiring. These units are recommended for immersion in water or 90+ percent water soluble solutions.
- Nickel-chromium resistance wire precisely centered in the unit ensures even, efficient distribution of heat to the sheath
- MgO insulation compacted to the proper density results in high dielectric strength and contributes to faster heat-up
- Alloy 800 sheath resists corrosion from water
- Metallurgically-bonded conductor pins for trouble-free electrical continuity
- 240 and 480VAC voltage allows flexibility in wiring the heater for use in your particular applications
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WATROD AND FIREBAR ANSI FLANGE IMMERSION HEATERS
AGENCY CERTIFIED TUBULAR HEATERS IDEAL FOR HEATING LIQUIDS, GASES, TANKS AND PRESSURE VESSELS REQUIRING HIGHER KILOWATTS
Watlow flanged immersion heaters are easy to install and maintain. Designed for heating liquids and gases in tanks and pressure vessels, flanged immersion heaters are ideal for applications requiring higher kilowatts.
Watlow flanged immersion heaters are made with WATROD or FIREBAR tubular elements brazed or welded to a flange. Stock flange heaters are equipped with a general purpose terminal enclosure.
Flanged immersion heaters, with FIREBAR elements, also answer the need for liquid immersion applications requiring high kilowatts in small tanks. The FIREBAR element’s unique flat surface geometry packs more power in a smaller bundle, with lower watt density, making it especially well-suited for petroleum-based liquid heating applications.
- UL® and CSA component recognition
- ANSI and ANSI compatible 2, 2½, 3 thru 48 inch flanges
- All units are inspected and/or tested to ensure element-to-flange pressure seals do not leak
- Integrel thermowells provide convenient temperature sensor insertion and replacement without draining the fluid being heated
- Standard, general purpose terminal enclosure for easy access to wiring
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HIGH-TEMPERATURE TUBULAR HEATERS
IDEAL FOR PROCESS AIR HEATING APPLICATIONS REQUIRING HIGH TEMPERATURES
Watlow manufactures high-temperature tubular heaters to bridge the gap between standard tubular heaters and Watlow MULTICELL™ heaters. This high temperature heater is well suited for process air heating applications in excess of 1300˚F (704˚C), resulting in a maximum sheath temperature of 1800˚F (983˚C). Controlled lab testing between the new design and current tubular designs shows an increase in life of approximately 50 percent.
The high-temperature heaters consist of an engineered tubing with an outer sheath of Alloy 600 and a special internal construction. The outer sheath offers high temperature capabilities, reduced oxidation as well as corrosion resistance.
The tubular heater offering is available in 0.430 and 0.375 inch diameters that are configurable either as formed tubulars or process heaters. The tubular heaters can also be welded to flanges and plates for mounting purposes. Maximum sheath length available is 275 inches for the 0.430 inch and 0.375 inch diameters. The factory should be contacted for longer sheath lengths.
- Alloy 600 sheath material and a special internal construction maximizes performance and corrosion protection in tough applications
- Dual-ended termination Installs into flanges and screw plugs similarly to standard product configurations
- Bendable in standard formations makes the heater easy to apply in a wide variety of applications
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MILLED GROOVE TUBULAR HEATERS
PRECISION FORMED TO YOUR HOT RUNNER MOLD APPLICATIONS
WATROD milled groove heaters are precision-formed and customized to your hot runner mold application. Even tight radius bends of 0.250 inch maintaining tolerances of ±0.062 to ±0.002 inch are possible. This capability not only allows you freedom to design for the optimum uniform heating pattern for your plastics process, but also guarantees quick and easy installation.
Simply send your groove dimensions in a detailed drawing or on CAD file. Depending on the formation requirements, the resulting CAD design will be transferred to either Watlow’s CNC bending equipment or a highly skilled bending operator.
A variety of sheath materials are available including alloy 800, 304 stainless steel and 316 stainless steel, each offering unique advantages of long life in high temperature molds, rigidity to maintain shape during shipment and corrosion resistance.
Watlow not only delivers the heat fast to the process with efficient heat transfer, but guarantees the heater’s fast delivery, too. While Watlow guarantees standard delivery within three to four weeks, tough delivery schedules are Watlow’s specialty.
- Precise conformity to customer specifications ensures easy installation
- Alloy 800 sheath material are corrosion resistant and capable in high-temperature environments
- 304 stainless steel features excellent pliability – best choice for small bend radii
- Superior resistance coil design produces even heating
- Threaded stud or lead wire termination as required provides robust options for challenging environments
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MULTICOIL™ HEATERS
MULTIPLE COILS AND THERMOCOUPLES PACKAGED IN ONE SHEATH FOR QUICK INSTALLATION
The MULTICOIL heater tubular element with multiple coils and/or thermocouples inside one sheath answers the need for a versatile, innovative tubular multiple coil heater. Watlow’s patented method of packaging a thermocouple inside of a heater with one or more resistance coils gives the ability to sense a heater’s internal temperature accurately, every time.
Moreover, this is the first tubular heater in the industry with three-phase capability. The three coil, three-phase heater will offer a compact package solution while delivering the full power required in a compact heater package. Previously three separate heaters would have been required to do the same job; therefore Watlow’s MULTICOIL heater capabilities save money.
- Three-phase capability results in one element versus three, lower amperage, reduced installation time and lower overall cost
- Multiple coil operations reduces inventory by allowing dual voltage capability
- Versatile forming capabilities forms into many configurations
- Internal thermocouple construction eliminates contamination buildup around the external sensing tip, reducing the possibility of false readings
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