Heater Catalog (Section) - Immersion Heaters - Watlow

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Immersion HeatersWATROD and FIREBAR Screw PlugImmersion HeatersScrew Plug with Control AssemblyAlloy 800 Sheath2 in. (51 mm) NPT Brass PlugConduit Openingsfor 3 /4 in. (19 mm) NPT10 in.(254 mm)BImmersed Length2 1 /4 in.(57 mm)4 1 /4 in.(108 mm)2 in. (51 mm) NPT Brass Screw Plug With Control Box (Assembly Stock)Immersed Part Number Est. NetWATROD Length 208VAC 240VAC 380VAC 480VAC 575VAC Wt.Desc. kW in. (mm) 3-Phase 3-Phase 3-Phase 3-Phase 3-Phase lbs (kg) Del.50 W/in 2 9 24 3 ⁄4 (629.0) BHNB24N3W2C11 BHNB24N5W2C11 BHNB24N16W2C11 23 (10) MBrass Plug 12 30 (762.0) BHNB30A2W2C11 BHNB30A3W2C11 BHNB30A8W2C11 BHNB30A5W2C11 BHNB30A16W2C11 24 (11) M3-Alloy 800 16 35 5 ⁄8 (904.8) BHNB35L2W2C11 BHNB35L3W2C11 BHNB35L8W2C11 BHNB35L5W2C11 BHNB35L16W2C11 25 (11) M(7.8 W/cm 2 ) 20 45 5 ⁄8 (1158.8) BHNB45L3W2C11 BHNB45L8W2C11 BHNB45L5W2C11 BHNB45L16W2C11 27 (12) M• M - Manufacturing lead timesAlloy 800 Sheath2 in. (51 mm) NPT Brass PlugBImmersed Length2 1 /4 in.(57 mm)2 in. (51 mm) NPT Brass Screw Plug With Control Box (Replacement Heater Only)Immersed Part Number Est. NetWATROD Length 208VAC 240VAC 380VAC 480VAC 575VAC Wt.Desc. kW in. (mm) 3-Phase 3-Phase 3-Phase 3-Phase 3-Phase lbs (kg) Del.50 W/in 2 9 24 3 ⁄4 (628.7) BHNB24N3 BHNB24N5 BHNB24N16 21 (9) MBrass Plug 12 30 (762.0) BHNB30A2 BHNB30A3 BHNB30A8 BHNB30A5 BHNB30A16 22 (10) MAlloy 800 16 35 5 ⁄8 (904.8) BHNB35L2 BHNB35L3 BHNB35L8 BHNB35L5 BHNB35L16 23 (10) M(7.8 W/cm 2 ) 20 45 5 ⁄8 (1158.8) BHNB45L3 BHNB45L8 BHNB45L5 BHNB45L16 25 (11) M• M - Manufacturing lead times236WATLOW ®
Immersion HeatersWATROD and FIREBAR ANSI FlangeImmersion HeatersWatlow flange heaters are easy to install and maintain.Designed for heating liquids and gases in tanks andpressure vessels, flange immersion heaters are ideal forapplications requiring higher kilowatts.Watlow flange heaters are made with WATROD orFIREBAR tubular elements brazed or welded to a flange.Stock flange heaters are equipped with a general purposeterminal enclosure.Flange heaters, with FIREBAR elements, also answerthe need for liquid immersion applications requiring highkilowatts in small tanks. The FIREBAR element’s uniqueflat surface geometry packs more power in a smallerbundle, with lower watt density, making it especiallywell-suited for petroleum-based liquid heating applications.Performance Capabilities• Watt densities up to 100 W/in 2 (15.5 W/cm 2 )• Wattages up to three megawatts• UL ® and CSA component recognition up to 600VAC• Alloy 800/840 sheath temperatures up to 1600°F(870°C)• Passivated 316 stainless steel sheath temperatures upto 1200°F (650°C)• 304 stainless steel sheath temperatures up to1200°F (650°C)• Steel sheath temperatures up to 750°F (400°C)• FIREBAR flange heaters deliver more kilowatts insmaller bundles• A conventional round tubular 10-inch ANSI flange canbe replaced by a 6-inch ANSI FIREBAR flange withsame immersed lengthFlangeConduit OpeningTerminal EnclosureThermowellFIREBARHeating ElementFeatures and BenefitsANSI and ANSI compatible 2, 2 1 /2, 3 thru 48 inchflanges• Provides appropriate heater size-to-application and fitElement sheath and flange materials• Meets your application needsIntegral thermowells• Provides convenient temperature sensor insertion andreplacement without draining the fluid being heatedStandard, general purpose terminal enclosure• Offers easy access to wiringWATROD Heating ElementElement support(s)• Provides proper element spacing to maximize heaterperformance and lifeAll units are inspected and/or tested• Ensures element-to-flange pressure seals do not leakDrilled and tapped eyebolt holes or lift lugs for eyebolts on 10 inch and larger flange heaters• Facilitates lifting during installationWATROD hairpins are repressed (recompacted)• Provides improved heater life, insulation resistance andheat transferWATLOW ®237
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Immersion HeatersMax. Operating Typ
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Immersion HeatersExtendedCapability
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Immersion HeatersOver-the-Side Heat
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Heater Catalog (Section) - Immersion Heaters - Watlow

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