Heater Catalog (Section) - Immersion Heaters - Watlow

Immersion HeatersWATROD and FIREBAR Screw PlugImmersion HeatersApplication: Lightweight Oilsand Heat Transfer 2.50" FIREBAR Oils• 2 1 2.50" FIREBAR23/2 inch NPT screw plug• FIREBAR elements• With thermostat (DPST)Note: Higher amperage products requirea pilot duty thermostat with separatepower controller. Please see followingpages for available heaters withoutthermostats.• General purpose or2.50"moisture/explosion-FIREBAR2.50" FIREBAR24resistant enclosure2324General Purpose5½ in. Dia.(140 5½ in. mm) Dia.(140 mm)75⁄8 in. Dia.(193.7 75⁄8 in. mm) Dia.(193.7 mm)71⁄16 in. Dia.(179.4 71⁄16 in. mm) Dia.(179.4 mm)Moisture/Explosion-Resistant85⁄8 in. Dia.(219.1 85⁄8 in. mm) Dia.(219.1 mm)¾ in. NPT Knockout¾ in. NPT Knockout(3) 1 in. (25 mm) FIREBAR Elements(3) 1 in. (25 mm) FIREBAR ElementsThermowellThermowell2½ in.(64 2½ mm) in.Bundle (64 mm)Bundle33⁄8 in. (85.7 mm) Cold (Ref.)33⁄8 in. (85.7 mm) Cold (Ref.)"B""B"1½ in. NPT Hubs1½ in. NPT Hubs(3) 1 in. (25 mm) FIREBAR Elements(3) 1 Thermowell in. (25 mm) FIREBAR ElementsThermowell2½ in.(64 2½ mm) in.Bundle (64 mm)Bundle33⁄8 in. (85.7 mm) Cold (Ref.)33⁄8 in. (85.7 mm) Cold (Ref.)"B""B"Type 5A (60 to 250°F) Type 7A (100 to 550°F)“B” Dim. Ship Wt.PartPartDescription Volts kW Ph in. (mm) lbs (kg) Number Del. Number Del.General Purpose Enclosure30 W/in 2 3 240 5.0 3 15 1 /8 (384.2) 12 (6) BLNF15C12S5A RS BLNF15C12S7A RS304 SS Plug3-Alloy 800480 5.0 3 15 1 /8 (384.2) 12 (6) BLNF15C13S5A RS BLNF15C13S7A RSElements 240 6.5 3 18 1 /8 (460.4) 13 (6) BLNF18C12S5A RS BLNF18C12S7A RS(4.7 W/cm 2 ) 480 6.5 3 18 1 /8 (460.4) 13 (6) BLNF18C13S5A RS BLNF18C13S7A RS240 8.5 3 23 1 /8 (587.4) 15 (7) BLNF23C12S5A RS BLNF23C12S7A RS23 W/in 2 8 240 3.8 3 15 1 /8 (384.2) 12 (6) BLNF15C20S5A RS BLNF15C20S7A RS304 SS Plug3-Alloy 800240 4.9 3 18 1 /8 (460.4) 13 (6) BLNF18C20S5A RS BLNF18C20S7A RSElements 240 6.4 3 23 1 /8 (587.4) 15 (7) BLNF23C20S5A RS BLNF23C20S7A RS(3.6 W/cm 2 ) 480 6.4 3 23 1 /8 (587.4) 15 (7) BLNF23C19S5A RS BLNF23C19S7A RS240 7.9 3 28 5 /8 (727.1) 18 (9) BLNF28L20S5A RS BLNF28L20S7A RS240 9.6 3 33 5 /8 (854.1) 19 (9) BLNF33L20S5A RS BLNF33L20S7A RS®®30 W/in 2 3304 SS Plug3-Alloy 800Elements(4.7 W/cm 2 )23 W/in 2 8304 SS Plug3-Alloy 800Elements(3.6 W/cm 2 )RAPID SHIP• RS - Next day shipmentup to 5 piecesMoisture/Explosion-Resistant Enclosure 7240 5.0 3 15 1 /8 (384.2) 14 (7) BLNF15C12C5A RS BLNF15C12C7A RS480 5.0 3 15 1 /8 (384.2) 14 (7) BLNF15C13C5A RS BLNF15C13C7A RS240 6.5 3 18 1 /8 (460.4) 16 (8) BLNF18C12C5A RS BLNF18C12C7A RS480 6.5 3 18 1 /8 (460.4) 16 (8) BLNF18C13C5A RS BLNF18C13C7A RS240 8.5 3 23 1 /8 (587.4) 18 (9) BLNF23C12C5A RS BLNF23C12C7A RS240 3.8 3 15 1 /8 (384.2) 14 (7) BLNF15C20C5A RS BLNF15C20C7A RS240 4.9 3 18 1 /8 (460.4) 16 (8) BLNF18C20C5A RS BLNF18C20C7A RS240 6.4 3 23 1 /8 (587.4) 18 (9) BLNF23C20C5A RS BLNF23C20C7A RS480 6.4 3 23 1 /8 (587.4) 18 (9) BLNF23C19C5A RS BLNF23C19C7A RS240 7.9 3 28 5 /8 (727.1) 21 (10) BLNF28L20C5A RS BLNF28L20C7A RS240 9.6 3 33 5 /8 (854.1) 22 (10) BLNF33L20C5A RS BLNF33L20C7A RSNote: 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 only8 Can be wired for 1-phase operation216 WATLOW ®