Heater Catalog - Watlow

Heater Selection MatrixHeating Liquids/Surface Heating and ImmersionHeaterTypeCartridge/InsertionHeatersTubularHeatersApplication DescriptionThese are used as an immersion heater placed eitherdirectly in the liquid, or in a protective well (recommendedfor immersion in water or 90 plus percent water solublesolutions).These heaters are immersed directly in the liquid beingheated. Most commonly used when high kilowatts arerequired. Multiple style mounting adaptors, such as flangesand NPT fittings, provide excellent pressure boundaries.SheathMaterialsAlloy 800 Up to 300in waterFlat: Alloy 800Stainless steelRound: Alloy 800Stainless steelSteelTypical Max. Max. OperatingWatt Densities TemperaturesW/in 2 W/cm 2 °F °C60606060606046.5 212in water9.39.39.39.39.39.31400120035016001200750CatalogPage100 11760650180870650400939361616161FlexibleHeatersImmersionHeatersCirculationHeatersFluidDeliveryHeatersHigh-TemperatureHeatersSpecialtyHeatersStrip/Clamp-OnHeatersThese heaters are applied to the surface of a pipe vesselcontaining a liquid (well suited for curved surfacesand irregular shaped objects; frequently used forfreeze protection).FIREBAR ® heaters have multiple elements mounted in a flangeor screw plug fitting. They are immersed directly in a fluid or ina protective well.WATROD heaters have multiple elements mounted in aflange or screw plug fitting. These are immersed directly in afluid or in a protective well.Tubular heaters have multiple elements mounted in a screwplug or ANSI flange fitting and placed in a vessel throughwhich fluid is passed. FIREBAR or WATROD elements maybe utilized.FREEFLEX ® heaters have polymeric heated tubing, used tomaintain temperature in medical applications where heatedflexible tubing is required.Syringe heaters are formed to fit a cylindrical part. Theyare often used in medical applications for heating contrastmedia and often incorporate a sensor and on-board system.Ceramic fiber assembled heaters can be used in a chambersurrounding the tank, vessel, crucible or bath. Radiant andconvection heat transfer heat the load.Coil/Cable heaters that are wrapped or wound around pipeor vessel containing a liquid can be used, or used directlyas an immersion heater. They are often used in applicationswith space limitations (i.e. photo processing equipment,scientific instruments and heat tracing).These heaters are bolted or clamped to the wall of atank or vessel. They are used in food warming and otherapplications offering a flat mounting surface.PolyimideSilicone rubberAlloy 800Alloy 800316 stainless steelSteelRound: Alloy 800Stainless steelSteelPolyimideLexanSilicone rubber2010Up to 100Up to 1006060606072 W/ft233.11.615.515.59.39.39.39.322 W/m0.310.47390500212in water212in water1400in air1600350120075021218542820026010010076087018065040010085220148117Molded ceramic fiber 30 4.6 2200 1205 433Stainless steel orAlloy 600 30 4.6 1200 650 467Aluminized steel withrefractory insulationStainless steel withmineral insulation10014015.521.711001400595760165165331385388481477Band/BarrelHeatersThese heaters are clamped to cylindrical surfaces and aremost commonly used to heat liquids flowing through pipesas freeze protection.Stainless steel withmineral insulation 100 15.5 1400 760 493WATLOW ®5