Heater Catalog (Section) - Immersion Heaters - Watlow

Immersion HeatersWATROD and FIREBAR Screw PlugImmersion Heaters®®Application: Medium Weight Oilsand Heat Transfer Oils• 2 1 /2 inch NPT screw plug• FIREBAR elements• Without thermostat• General purpose or moisture/explosionresistantenclosure2.50" FIREBAR21General Purpose45⁄8 in. Dia.(117.5 mm)Moisture/Explosion-Resistant411⁄16 in. Dia.(119.1 mm)¾ in. NPT Knockout(3) 1 in. (25 mm) FIREBAR Elements1¼ in. NPT HubsThermowell33⁄8 in. (85.7 mm) Cold (Ref.)"B"2½ in.(64 mm)Bundle(3) 1 in. (25 mm) FIREBAR ElementsThermowell226¼ in. Dia.(159 mm)2½ in.(64 mm)Bundle7¼ in. Dia.(185 mm)33⁄8 in. (85.7 mm) Cold (Ref.)"B"“B” Dim. PartShip Wt. PartShip Wt.Description Volts kW Ph In. (mm) Number Del. lbs (kg) Number 7 Del. lbs (kg)General Purpose Enclosure Moisture/Explosion-Resistant Enclosure15 W/in 2 3 240 2.0 3 12 (305) BLNF12A29S RS 10 (5) BLNF12A29C RS 13 (6)304 SS Plug3-Alloy 800240 2.5 3 14 1 /2 (368) BLNF14J29S RS 11 (5) BLNF14J29C RS 14 (7)Elements 240 3.0 3 17 (432) BLNF17A29S RS 12 (6) BLNF17A29C RS 15 (7)(2.3 W/cm 2 ) 240 4.0 3 21 1 /2 (546) BLNF21J29S RS 14 (7) BLNF21J29C RS 17 (8)480 4.0 3 21 1 /2 (546) BLNF21J30S RS 14 (7) BLNF21J30C RS 17 (8)240 5.0 3 26 1 /2 (673) BLNF26J29S RS 17 (8) BLNF26J29C RS 20 (9)480 5.0 3 26 1 /2 (673) BLNF26J30S RS 17 (8) BLNF26J30C RS 20 (9)240 6.0 3 31 1 /2 (800) BLNF31J29S RS 18 (9) BLNF31J29C RS 21 (10)480 6.0 3 31 1 /2 (800) BLNF31J30S RS 18 (9) BLNF31J30C RS 21 (10)240 8.0 3 41 (1041) BLNF41A29S RS 20 (9) BLNF41A29C RS 23 (11)480 8.0 3 41 (1041) BLNF41A30S RS 20 (9) BLNF41A30C RS 23 (11)240 10.0 3 50 1 /2 (1283) BLNF50J29S RS 22 (10) BLNF50J29C RS 25 (12)480 10.0 3 50 1 /2 (1283) BLNF50J30S RS 22 (10) BLNF50J30C RS 25 (12)RAPID SHIP• RS - Next day shipmentup to 5 piecesNote: All screw plug bundles are designed to fit the inside diameter ofthe equivalent mating coupling. They will not fit into the equivalent pipeinside diameter.3 Wired for 3-phase operation only7 CSA certified onlyWATLOW ®227