Heater Catalog - Watlow

Immersion HeatersWATROD and FIREBAR Screw PlugImmersion Heaters®®Application: Bunker C, Asphaltand #6 Fuel Oil• 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 Enclosure8 W/in 2 3 240 1.25 3 15 1 /8 (384.2) BLNF15C22S RS 11 (5) BLNF15C22C RS 14 (7)304 SS Plug3-Alloy 800240 1.63 3 18 1 /8 (460.4) BLNF18C22S RS 12 (6) BLNF18C22C RS 15 (7)Elements 240 2.13 3 23 1 /8 (587.4) BLNF23C22S RS 14 (7) BLNF23C22C RS 17 (8)(1.3 W/cm 2 ) 480 2.13 3 23 1 /8 (587.4) BLNF23C21S RS 14 (7) BLNF23C21C RS 17 (8)240 2.63 3 28 5 /8 (727.1) BLNF28L22S RS 17 (8) BLNF28L22C RS 20 (9)480 2.63 3 28 5 /8 (727.1) BLNF28L21S RS 17 (8) BLNF28L21C RS 20 (9)240 3.19 3 33 5 /8 (854.1) BLNF33L22S RS 18 (9) BLNF33L22C RS 21 (10)480 3.19 3 33 5 /8 (854.1) BLNF33L21S RS 18 (9) BLNF33L21C RS 21 (10)240 4.25 3 44 1 /8 (1120.8) BLNF44C22S RS 20 (9) BLNF44C22C RS 23 (11)480 4.25 3 44 1 /8 (1120.8) BLNF44C21S RS 20 (9) BLNF44C21C RS 23 (11)240 5.38 3 54 5 /8 (1387.5) BLNF54L22S RS 22 (10) BLNF54L22C RS 25 (12)480 5.38 3 54 5 /8 (1387.5) BLNF54L21S RS 22 (10) BLNF54L21C 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 ®233