Heater Catalog (Section) - Immersion Heaters - Watlow

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Immersion HeatersStorage TankExtendedCapabilityWATROD and FIREBAR FlangeImmersion HeatersExtended Capabilities ForBayonet/Pipe Insert Immersion HeatersBayonet/Pipe insert immersion heaters permit removingand servicing the heater bundle without draining the liquidbeing heated.Heating is accomplished by mounting a flange or screwplug immersion heater inside a pressure-tight bayonetpipe vessel. The pipe vessel then mates to a flangeconnection on a storage tank’s side. Heat transferbetween element(s) and tank contents is accomplishedby heating the air or heat transfer fluid inside the bayonetpipe for conduction to the tank’s contents.Performance Capabilities• Wattages up to 100 kilowatts• Voltages up to 600VAC• Ratings up to 600 lb pressure class• Alloy 800 sheath temperatures up to 1400°F (760°C)• Stainless steel sheath temperatures up to1200°F (650°C)• Steel sheath temperatures up to 750°F (400°C)Features and BenefitsLow watt density screw plug or flange heatersmounted in the bayonet vessel• Provides long lifeCarbon steel, 304 and 316 stainless steelbayonet vessels• Offers compatibility with a wide range of liquidsWelded flange on pipe vessel• Ensures pressure sealHeating elements support(s)• Ensures proper element spacing and maximum heaterperformanceFlangeHeaterNo-HeatStorage TankBayonet VesselTypical Applications• Indirect heating of viscous fluids:• Asphalt• Tar• Molasses• Syrup• Glue• Corrosive liquids• Degreasing fluids316 WATLOW ®
Immersion HeatersExtendedCapabilityWATROD and FIREBAR FlangeImmersion HeatersExtended Capabilities ForBayonet/Pipe Insert Immersion HeatersOptionsPipe insert heaters can be supplied with a variety ofoptions, including:• Appropriate gasket materials• Passivation cleaning on pipe insert• European screw plug to flange adapters• CSA certified terminal enclosures• Stand-off terminal enclosures• Thermocouple temperature sensors• Thermostats• Customer specified materials, sizes and pressureclass ratingsFor descriptions and ordering information about theseoptions, please refer to Flange Immersion Heaters, pages237 to 306, or Screw Plug Immersion Heaters, pages165 to 234.Application Hints• Mount pipe insert heater horizontally• Locate pipe insert heaters low in the tank, but abovethe sludge level• Consider a low liquid level sensor to protect againstlow liquid level conditions• Select a watt density that is compatible with the heattransfer media being used• Insulate the pipe insert heater’s exterior to minimizeheat lossCaution:Do not insulate the terminal enclosure.FlangesFlanges to 24 in. (610 mm) nominal pipe size areavailable in materials compatible with specific applicationneeds. For information on flange materials and ratings,consult your Watlow representative.Bayonet VesselsBayonet vessels are available up to 14 in. (356 mm)nominal pipe size and 20 feet long. Vessel size isdependent upon the kilowatt requirement and elementwatt density. For more information, contact your Watlowrepresentative.WATLOW ®317
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Heater Catalog (Section) - Immersion Heaters - Watlow

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