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Watlow WATROD™ Tubular Heaters

Product Overview

Available in single- or double-ended termination styles, the versatile and economical WATROD™ tubular heating element from Watlow lends itself to virtually the entire range of immersion and air heating applications.

Overview

The single-ended WATROD™ tubular heater design has both terminals at one end. The opposite end is sealed. Flexible lead wires are 12 in. (305 mm) crimp connected to the terminal pin and have silicone-impregnated fiberglass oversleeves.

The double-ended WATROD™, with its round cross-sectional geometry, are highly adaptable for bending—especially when bending is performed in the field. Watlow's double-ended MULTICOIL™ tubular elements offer various combinations of resistor coils and thermocouples inside one sheath. They have the ability to sense the heater's internal temperature accurately every time, or offer three-phase capability in one element.

Both single- and double-ended WATROD™s share many construction features delivering long life—the resistance wire is centered in the heater sheath and electrically insulated with compacted, high-grade magnesium oxide for superior heating performance.

WATROD™ tubular heating elements have a variety of mounting and termination options making them highly popular among industrial customers.

Features & Benefits

Single-ended: UL® and CSA component recognition to 240VAC.
Double-ended: UL® and CSA component recognition up to 600VAC.

Precision Wound Nickel-Chromium Resistance Wire
Distributes heat evenly to the sheath for optimum heater performance.

Silicone Resin Seals
Protects against moisture contamination and is rated to 221°F (105°C).

MGO Insulation Filled Sheath
Maximizes dielectric strength, heat transfer and life.

Standard Sheath Materials
Steel, 304 and 316 stainless steel, alloy 800/840 and alloy 600.

53 Standard Bend Formations
Allows forming the heating element to the application. Spirals, compound bends and multi-axis and multi-plane configurations.

Stainless Steel Studs
Fusion welded to terminal pins for mechanical strength.

Specifications

Material
Double-Ended Alloy 800/840

Maximum Operating Temperatures
1800 F°
982 C°

Maximum Watt Densities
W/in2 = 45
W/cm2 = 6.9

Material
Double-Ended Stainless Steel

Maximum Operating Temperatures
350 F°
175 C°

Maximum Watt Densities
W/in2 = 60
W/cm2 = 9.3

Material
Double-Ended Steel

Maximum Operating Temperatures
750 F°
400 C°

Maximum Watt Densities
W/in2 = 45
W/cm2 = 6.9

Material
Singled-ended Alloy 800/840

Maximum Operating Temperatures
1600 F°
870 C°

Maximum Watt Densities
W/in2 = 45
W/cm2 = 6.9

Material
Single-Ended Stainless Steel

Maximum Operating Temperatures
1200 F°
650 C°

Maximum Watt Densities
W/in2 = 60
W/cm2 = 9.3

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