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W AT R O D T U B U L A R H E AT E R S
WATROD Tubular
Heaters Provide
Optimum Manifold
Heating
Available in single- or double-ended termination styles, the
versatile and economical WATROD tubular heating element
lends itself to efficient heating of hot runner manifolds. The
single-ended WATROD tubular design has both terminals at
one end. The opposite end is sealed to resist contamination.
Standard 305 mm (12 in.) flexible lead wires are crimp
connected to the terminal pin and have silicone impregnated
fiberglass oversleeves. With its round cross-section
geometry, the double-ended WATROD is highly adaptable for
bending – especially when bending is performed in the field.
Both single- and double-ended WATRODs share many
construction features that deliver long life—the resistance
wire is centered in the heater sheath and electrically insulated
with compact, high-grade magnesium oxide for superior
manifold heating. Watlow’s double-sided 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.
© Watlow Electric Manufacturing Company, 2001
Features and Benefits
Precision wound nickel-chromium resistance wire
• Distributes heat evenly to the sheath for optimum heater
performance
Silicone resin seals
• Protect against moisture contamination and manifold
leakage and are rated to 200°C (390°F)
MgO insulation filled sheath
• Maximizes dielectric strength, heat transfer and life
Standard sheath materials include
• Copper, steel 316 stainless steel and Inconel
®
• Optional materials, available on made-to-order, include
304 stainless steel, Inconel
®
, Monel
®
and titanium
36 standard bend formations
• Allows for exacting fit to the manifold
• Spirals, compound bends, multi-axis and multi-plane
configurations
Resistance wire fusion welded to the terminal pin
• For a stronger, positive electrical connection
Stainless steel studs
• Fusion welded to terminal pins for mechanical strength
with ceramic insulator
Watlow Hannibal
#6 Industrial Loop Drive
P.O. Box 975
Hannibal, MO 63401
Phone: +1 (573) 221-2816
Fax: +1 (573) 221-3723
Internet: www.watlow.com
e-mail: info@watlow.com
Performance Capabilities
Single-Ended WATROD
• Watt densities to 6.9 W/cm
2
(45 W/in
2
)
• UL
®
and CSA component recognition to 240V~(ac)
• Incoloy
®
and stainless steel sheath temperatures to
650°C (1200°F)
Double-Ended WATROD
• Watt densities to 18.6 W/cm
2
(120 W/in
2
)
• UL
®
and CSA component recognition to 480 and
600V~(ac) respectively
• Inconel
®
sheath temperatures to 982°C (1800°F)
HAN-WRD-1001
Watlow GmbH
Lauchwasenstr. 1, Postfach 1165
Kronau 76709 Germany
Phone: +49 (0) 7253-9400-0
FAX: +49 (0) 7253-9400 44
e-mail: info@watlow.de
Incoloy
®
, Inconel
®
and Monel
®
are registered trademarks of
Special Metals Corporation (formerly Inco).
UL
®
is a registered trademark of Underwriter’s Laboratories, Inc.