Heater Catalog - Watlow

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Air HeatersExtendedCapabilityExtended Capabilities For Duct HeatersLDH SERIES and D SERIESPerformance Capabilities• Wattages to 2.2 megawattsFeatures and BenefitsCeramic fiber insulation available• Keeps wiring cooler and reduces heat lossGreater than 1 /4 in. (6 mm) with 304 or 316stainless steel flange material• Easily bolts to the duct wall60 plus element designs available• Meets a wide variety of kilowatt demandsOptionsSheath MaterialWatlow duct heaters can be made with the followingsheath materials:• 304, 316, 321 SS• Alloy 800, 840• Laminated alloy 600 (hi-temp)• Hastelloy C276Contact your Watlow representative for details andavailability.Terminal EnclosuresIn addition to the standard, general purpose terminalenclosure, Watlow offers the following optional terminalenclosures to meet specific applicationrequirements:• Explosion resistant (contact your Watlowrepresentative)• High-temperature stand-off enclosures396 WATLOW ®
Air HeatersDuct HeatersLDH SERIESApplication: High Temperature Air800°F (427°C)• Welded alloy 840 WATROD elements• Without thermostat• General purpose enclosure• Steel flange1 3 and 6 element heaters have (1) 1 inch NPT conduit opening;9, 12 and 15 element heaters have (2) 1 inch NPT conduitopenings; 18 element heaters have (2) 1 1 /2 inch NPT conduitopenings; 21 element (B= 20 1 /4 in.) heaters have (2) 1 1 /2 inchNPT conduit openings; remaining 21 and 24 element heatershave (3) 1 1 /2 inch NPT conduit openings2 All flanges are 12 inches wide• M - Manufacturing lead timesTruck Shipment onlyb10½ in.(267 mm)1FØ 3⁄8 in.(10 mm)DC¼ in.(6 mm)3½ in.(89 mm)Typical8¾ in.(222 mm)3½ in.(89 mm)8 in.(203 mm)# of# PartShip Wt. “A” Dim. “B” Dim. “C” Dim. “D” Dim. “E” Dim. “F” Dim. “G” Dim.Elem Volts kW Ph Circ Number Del. lbs (kg) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm)20 W/in 2 (3.1 W/cm 2 )3 240 9.0 1 1 LDH9S10S M 55 (25) 28 1 /4 (718) 20 1 /4 (514) 3 3 /4 (95) 7 1 /2 (191) 4 (102) 4 5 /8 (117.5) 3 (76)3 240 9.0 3 1 LDH9S3S M 55 (25) 28 1 /4 (718) 20 1 /4 (514) 3 3 /4 (95) 7 1 /2 (191) 4 (102) 4 5 /8 (117.5) 3 (76)3 480 9.0 1 1 LDH9S11S M 55 (25) 28 1 /4 (718) 20 1 /4 (514) 3 3 /4 (95) 7 1 /2 (191) 4 (102) 4 5 /8 (117.5) 3 (76)3 480 9.0 3 1 LDH9S5S M 55 (25) 28 1 /4 (718) 20 1 /4 (514) 3 3 /4 (95) 7 1 /2 (191) 4 (102) 4 5 /8 (117.5) 3 (76)6 240 18.0 1 2 LDH18S10S M 65 (30) 28 1 /4 (718) 20 1 /4 (514) 6 3 /4 (171) 10 1 /2 (267) 7 (178) 7 5 /8 (193.7) 3 (76)6 240 18.0 3 1 LDH18S3S M 65 (30) 28 1 /4 (718) 20 1 /4 (514) 6 3 /4 (171) 10 1 /2 (267) 7 (178) 7 5 /8 (193.7) 3 (76)6 480 18.0 1 1 LDH18S11S M 65 (30) 28 1 /4 (718) 20 1 /4 (514) 6 3 /4 (171) 10 1 /2 (267) 7 (178) 7 5 /8 (193.7) 3 (76)6 480 18.0 3 1 LDH18S5S M 65 (30) 28 1 /4 (718) 20 1 /4 (514) 6 3 /4 (171) 10 1 /2 (267) 7 (178) 7 5 /8 (193.7) 3 (76)9 240 27.0 1 3 LDH27S10S M 120 (55) 28 1 /4 (718) 20 1 /4 (514) 9 3 /4 (248) 13 1 /2 (343) 10 (254) 10 5 /8 (269.9) 3 (76)9 240 27.0 3 3 LDH27S3S M 120 (55) 28 1 /4 (718) 20 1 /4 (514) 9 3 /4 (248) 13 1 /2 (343) 10 (254) 10 5 /8 (269.9) 3 (76)9 480 27.0 1 3 LDH27S11S M 120 (55) 28 1 /4 (718) 20 1 /4 (514) 9 3 /4 (248) 13 1 /2 (343) 10 (254) 10 5 /8 (269.9) 3 (76)9 480 27.0 3 1 LDH27S5S M 120 (55) 28 1 /4 (718) 20 1 /4 (514) 9 3 /4 (248) 13 1 /2 (343) 10 (254) 10 5 /8 (269.9) 3 (76)12 240 36.0 1 4 LDH36S10S M 135 (62) 28 1 /4 (718) 20 1 /4 (514) 12 3 /4 (324) 16 1 /2 (419) 13 (330) 13 5 /8 (346.1) 3 (76)12 240 36.0 3 2 LDH36S3S M 135 (62) 28 1 /4 (718) 20 1 /4 (514) 12 3 /4 (324) 16 1 /2 (419) 13 (330) 13 5 /8 (346.1) 3 (76)12 480 36.0 1 2 LDH36S11S M 135 (62) 28 1 /4 (718) 20 1 /4 (514) 12 3 /4 (324) 16 1 /2 (419) 13 (330) 13 5 /8 (346.1) 3 (76)12 480 36.0 3 1 LDH36S5S M 135 (62) 28 1 /4 (718) 20 1 /4 (514) 12 3 /4 (324) 16 1 /2 (419) 13 (330) 13 5 /8 (346.1) 3 (76)15 240 45.0 3 5 LDH45S3S M 195 (89) 28 1 /4 (718) 20 1 /4 (514) 15 3 /4 (400) 19 1 /2 (495) 16 (406) 17 7 /8 (454.0) 3 (76)15 480 45.0 1 3 LDH45S11S M 195 (89) 28 1 /4 (718) 20 1 /4 (514) 15 3 /4 (400) 19 1 /2 (495) 16 (406) 17 7 /8 (454.0) 3 (76)15 480 45.0 3 5 LDH45S5S M 195 (89) 28 1 /4 (718) 20 1 /4 (514) 15 3 /4 (400) 19 1 /2 (495) 16 (406) 17 7 /8 (454.0) 3 (76)18 240 54.0 3 3 LDH54S3S M 205 (93) 28 1 /4 (718) 20 1 /4 (514) 18 3 /4 (476) 22 1 /2 (572) 19 (483) 20 7 /8 (530.2) 3 (76)18 480 54.0 1 3 LDH54S11S M 205 (93) 28 1 /4 (718) 20 1 /4 (514) 18 3 /4 (476) 22 1 /2 (572) 19 (483) 20 7 /8 (530.2) 3 (76)18 480 54.0 3 2 LDH54S5S M 205 (93) 28 1 /4 (718) 20 1 /4 (514) 18 3 /4 (476) 22 1 /2 (572) 19 (483) 20 7 /8 (530.2) 3 (76)21 240 63.0 3 7 LDH63S3S M 235 (107) 28 1 /4 (718) 20 1 /4 (514) 21 3 /4 (552) 25 1 /2 (848) 22 (559) 23 7 /8 (606.4) 3 (76)21 480 63.0 1 3 LDH63S11S M 235 (107) 28 1 /4 (718) 20 1 /4 (514) 21 3 /4 (552) 25 1 /2 (848) 22 (559) 23 7 /8 (606.4) 3 (76)21 480 63.0 3 7 LDH63S5S M 235 (107) 28 1 /4 (718) 20 1 /4 (514) 21 3 /4 (552) 25 1 /2 (848) 22 (559) 23 7 /8 (606.4) 3 (76)21 240 79.0 3 7 LDH79S3S M 260 (118) 33 (838) 25 (635) 21 3 /4 (552) 25 1 /2 (848) 22 (559) 23 7 /8 (606.4) 3 (76)21 480 79.0 1 7 LDH79S11S M 260 (118) 33 (838) 25 (635) 21 3 /4 (552) 25 1 /2 (848) 22 (559) 23 7 /8 (606.4) 3 (76)21 480 79.0 3 7 LDH79S5S M 260 (118) 33 (838) 25 (635) 21 3 /4 (552) 25 1 /2 (848) 22 (559) 23 7 /8 (606.4) 3 (76)21 240 105.0 3 7 LDH105S3S M 290 (132) 40 1 /2 (1029) 32 1 /2 (826) 21 3 /4 (552) 25 1 /2 (848) 22 (559) 23 7 /8 (606.4) 3 (76)21 480 105.0 1 7 LDH105S11S M 290 (132) 40 1 /2 (1029) 32 1 /2 (826) 21 3 /4 (552) 25 1 /2 (848) 22 (559) 23 7 /8 (606.4) 3 (76)21 480 105.0 3 7 LDH105S5S M 290 (132) 40 1 /2 (1029) 32 1 /2 (826) 21 3 /4 (552) 25 1 /2 (848) 22 (559) 23 7 /8 (606.4) 3 (76)21 480 131.0 3 7 LDH131S5S M 310 (141) 49 1 /2 (1257) 41 1 /2 (1054) 21 3 /4 (552) 25 1 /2 (848) 22 (559) 23 7 /8 (606.4) 3 (76)24 480 150.0 3 4 LDH150S5S M 330 (150) 49 1 /2 (1257) 41 1 /2 (1054) 24 3 /4 (629) 28 1 /2 (724) 25 (635) 26 7 /8 (682.6) 3 (76)GTypicalNotes:• See Watt Density vs. Air Temperature/Velocity charts onpage 393 to confirm suitability in the application.BAE®9 in.(229 mm)10½ in.(267 mm)®WATLOW ®397
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Table of ContentsWhat type of heate
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Watlow’s Lead Time OptionsTo rema
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Heater Selection MatrixHeating Liqu
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Heater Selection MatrixHeating With
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Cartridge/Insertion HeatersMax. Ope
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Cartridge/Insertion HeatersFIREROD
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Cartridge/Insertion HeatersMin. No-
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Cartridge/Insertion HeatersExtended
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Cartridge/Insertion HeatersMetric F
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Tubular HeatersMax. Operating Typic
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Tubular HeatersWATROD Single/Double
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1" A1"Tubular HeatersWATROD Single/
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Tubular HeatersWATROD 1- 9WATROD 1-
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WATROD 1- 19Tubular HeatersWATROD S
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R 2R 2BWATROD 1- 31Tubular HeatersW
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figure 47 newTubular HeatersWATROD
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WATROD 2BTubular HeatersWATROD Sing
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Tubular HeatersThreaded Stud Termin
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Tubular HeatersExtendedCapabilityEx
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Tubular HeatersWATROD Double-Ended
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Tubular HeatersExtendedCapabilityWA
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Tubular HeatersExtendedCapabilityWA
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Tubular HeatersFIREBAR ® Single/Do
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1" 1" (25 (25 mm) mm)Min. Min. No N
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DDTubular HeatersFIREBAR Single/Dou
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Tubular HeatersFIREBAR Single/Doubl
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Tubular HeatersAFIREBAR Single/Doub
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Tubular HeatersFINBAR Single-Ended
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Flexible HeatersMax. Operating Typi
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Flexible HeatersFlexible Shapes and
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Flexible HeatersSilicone Rubber Hea
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Flexible HeatersLine HeatingModular
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Flexible HeatersLine HeatingSTRETCH
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Flexible HeatersLine HeatingSTRETCH
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Flexible HeatersPolyimide HeatersTe
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Flexible HeatersPolyimide HeatersSp
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Flexible HeatersSERIES EHGTechnical
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Flexible HeatersSERIES EHG SL10Tech
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Flexible HeatersSERIES EHG SL10Tech
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Flexible HeatersSERIES EHG CLTechni
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Flexible HeatersSERIES EHG CLTechni
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Immersion HeatersMax. Operating Typ
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Immersion HeatersWATROD and FIREBAR
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Immersion Heaters1" WATROD45⁄8 in
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Immersion Heaters¾ in. NPT Knockou
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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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Immersion HeatersExtendedCapability
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Immersion HeatersOver-the-Side Heat
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Immersion HeatersOver-the-Side Heat
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Immersion HeatersFIREROD ® Immersi
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Immersion HeatersFIREROD Immersion
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Circulation HeatersMax. Operating T
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Circulation HeatersSTARFLOW Heaters
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Circulation HeatersWATROD and FIREB
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3½ in.Circulation HeatersWATROD an
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½ in.NPT DrainCirculation HeatersW
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½ in.NPT DrainCirculation HeatersW
Page 345 and 346: Circulation Heaters2 1/2 NPTSCREW P
Page 347 and 348: ½ in.NPT DrainCirculation HeatersW
Page 349 and 350: Circulation HeatersWATROD and FIREB
Page 353 and 354: 4"-150# 4"-150#FLANGE FLANGE513⁄1
Page 357 and 358: (163.5 mm)Circulation HeatersB¾ in
Page 361 and 362: ½ in.NPT DrainCirculation HeatersW
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Page 371 and 372: (163.5 mm)67⁄16 in. Ref.(163.5 mm
Page 373 and 374: FLANGE½ in.NPT DrainCirculation He
Page 383 and 384: Fluid Delivery HeatersMax. Operatin
Page 385 and 386: Fluid Delivery HeatersExtendedCapab
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Page 389 and 390: Air HeatersDuct HeatersLDH SERIES a
Page 395: Air HeatersDuct HeatersLDH SERIES a
Page 399 and 400: Air HeatersDuct HeatersD SERIES®®
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Page 405 and 406: Air HeatersDuct HeatersMDH SERIESWa
Page 407 and 408: Air HeatersDuct HeatersMDH SERIESDT
Page 409 and 410: Air HeatersFinned Heaters375 Finned
Page 411 and 412: 10-24 Threaded Terminals1.18 in.(30
Page 413 and 414: Air HeatersFinned Heaters375 Finned
Page 415 and 416: Air HeatersFinned HeatersFINBAR Sin
Page 417 and 418: Air HeatersEnclosure HeatersWATROD
Page 419 and 420: Air HeatersEnclosure HeatersSilicon
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Page 423 and 424: High-Temperature HeatersMax. Operat
Page 425 and 426: High-Temperature HeatersMULTICELL H
Page 431 and 432: High-Temperature HeatersExtended Ca
Page 433 and 434: High-Temperature HeatersCeramic Fib
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High-Temperature HeatersCeramic Fib
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Specialty HeatersMax. Operating Typ
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Specialty HeatersULTRAMIC ® Advanc
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Specialty HeatersExtendedCapability
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Specialty HeatersThick Film Conduct
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Specialty HeatersExtendedCapability
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Specialty HeatersCoil/Cable Heaters
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Strip/Clamp-On HeatersMax. Operatin
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Strip/Clamp-On HeatersMineral Insul
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½ in.(13 mm) 10-24 Screw Thread¾
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Strip/Clamp-On Heaters375 High-Temp
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(30 mm)A7 ⁄8 in.(22.2 mm)3⁄8 in
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Strip/Clamp-On HeatersExtendedCapab
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Strip/Clamp-On Heaters375 High-Temp
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Strip/Clamp-On HeatersFIREBAR ® Cl
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Band/Barrel HeatersMax. Operating T
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Band/Barrel HeatersMineral Insulate
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wwBand/Barrel HeatersMineral Insula
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Nozzle HeatersMax. Operating Typica
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Nozzle HeatersMineral Insulated (MI
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Nozzle HeatersPre-Coiled Cable Nozz
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Radiant HeatersMax. Operating Typic
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Radiant HeatersRAYMAX ® Panel Heat
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Radiant HeatersRAYMAX Panel Heaters
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2 15 /16 in. (74.6 mm)Radiant Heate
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Thermostats and AccessoriesThermost
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Thermostats and AccessoriesST10 and
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Thermostats and AccessoriesST10 and
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SPSTP1 L1Thermostats and Accessorie
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Thermostats and AccessoriesBulb and
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Thermostats and AccessoriesInternal
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Reference DataReference DataPower C
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Reference DataPower CalculationsCal
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Reference DataPower CalculationsCon
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Reference DataPower CalculationsCon
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Reference DataEquationsOhm’s LawV
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Reference DataWattage RequirementsT
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Reference DataTubular Elements and
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Agency Certifications, Recognition
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IndexIndexProduct Category Index...
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IndexProduct Category Index375 Finn
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IndexPart Number IndexPartPageNumbe
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Terms and Conditions of SaleQuantit
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Heater Catalog - Watlow

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