Heater Catalog (Section) - Immersion Heaters - Watlow

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Immersion HeatersOver-the-Side HeatersL and O Shaped Immersion HeatersOrdering InformationPart NumberStock Over-the-SidePart NumberOptionalTerminalEnclosuresOptionalProcessSensorsSheathLimitSensorsStock Over-the-Side Part NumberNote: Catalog part numbers include optional enclosures andprocess sensors. To order optional enclosures or sensors, substitutethe appropriate suffix.Optional Terminal EnclosuresW = Moisture-resistant enclosureC = Moisture/explosion-resistant enclosureNote: Catalog listings include moisture resistant enclosure. Substituteenclosure options are noted.2A =3A =5A =7A =PJ =PK =Optional Process Sensors30 to 250°F, (-1 to 121°C) SPST175 to 550°F, (79 to 288°C) SPST60 to 250°F, (16 to 121°C) DPST100 to 550°F, (38 to 288°C) DPSTType J process thermocouple in thermowellType K process thermocouple in thermowellNote: Thermostat part numbers are shown in the Thermostat Charton page 537.Sheath Limit SensorsTJ = Type J high-limit thermocouple, vertical/housing at topTK = Type K high-limit thermocouple, vertical/housing at topNote: Heater orientation is critical to accurate sensing of limitconditions. Use the appropriate code to indicate heater mountingorientation.Example Part Number: OLN714L3 W 2A TK322 WATLOW ®
Immersion HeatersFIREROD ® Immersion HeatersFIREROD ® immersion heaters are ideal to replacelarge screw-plug immersion heaters. Packaging up to300 W/in 2 (46.5 W/cm 2 ) in a compact unit, these heatersare versatile when designed into a heating system.FIREROD immersion heaters are complete with astainless steel 3 /4 inch National Pipe Thread Taper (NPT)double-threaded fitting which allows conduit boxes tobe added. They are also sealed at the lead end with asilicone rubber seal.Solid copper leads with silicone rubber sleeves areprovided for unrestricted wiring. These heaters arerecommended for immersion in water of 90+ percentwater soluble solutions.Performance Capabilities• Maximum operating temperature in water up to 212°F(100°C) at atmospheric pressure• Maximum watt density up to 300 W/in 2 (46.5 W/cm 2 )• Maximum voltage up to 480VACFeatures and BenefitsNickel-chromium resistance wire precisely centeredin the unit• Ensures even, efficient distribution of heat to the sheathMagnesium oxide (MgO) insulation compacted tothe proper density• Results in high dielectric strength and contributes tofaster heat-upAlloy 800 sheath• Resists water corrosionMetallurgically-bonded conductor pins• Overlap the resistance wire inside of the coreto ensure trouble-free electrical continuityLead end with silicone rubber seal• Protects the heater against moisture contaminationStainless steel fittings• Offer availability for use in corrosive applicationsHorizontal through the wall tank mounting• Provides faster set-up240 and 480VAC voltage• Allows wiring flexibility for heater use in particularapplications4 in. (102 mm)No-Heat6 in. (152 mm) SolidPins with SiliconeRubber BootsTypical Applications• Plastic reclamation• Food preparation• Lab equipmentAlloy 800SheathNickel-ChromiumResistance WireMgO InsulationDouble Threaded 3 ⁄4 in.NPT 1 3 ⁄8 in. (34.9 mm) longWATLOW ®323
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Immersion HeatersMax. Operating Typ
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Immersion HeatersWATROD and FIREBAR
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Thermowell2.50" WATROD195½ in. Dia
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Immersion Heaters1.25" FIREBAR11WAT
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Immersion Heaters2" WATRODWATROD an
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Stand-offTerminalEnclosureConduitOp
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Direction of FlowImmersion HeatersW
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7½ in. Ref.(191 mm)75⁄8 in.(193.
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5"-150# FLANGEImmersion HeatersTher
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4"-150# FLANGEImmersion HeatersWATR
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6"-150# FIREBAR FLANGEImmersion Hea
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Heater Catalog (Section) - Immersion Heaters - Watlow

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