Watlow Heater Catalog

Immersion Heaters

WATROD and FIREBAR Screw Plug Immersion Heaters

®

®

¾ in. NPT Knockout ¾ in. NPT Knockout

Application: Bunker C, Asphalt and #6 Fuel Oil • 2 1 / 2 inch NPT screw plug • FIREBAR elements • With thermostat (DPST), Type 5A or 7A • General purpose enclosure • Moisture/Explosion-Resistant enclosure (suitable for use in non-classified areas only) 2.50" FIREBAR 2.50" FIREBAR

General Purpose

(3) 1 in. (25 mm) FIREBAR Elements (3) 1 in. (25 mm) FIREBAR Elements

Thermowell Thermowell

2 ½ in. (64 mm) Bundle 2 ½ in. (64 mm) Bundle

5 ½ in. Dia. (140 mm) 5 ½ in. Dia. (140 mm)

23 23

3 ⁄ in. (85.7 mm) Cold (Ref.) 3 ⁄ in. (85.7 mm) Cold (Ref.)

7 ⁄ in. Dia. (179.4 mm) 7 ⁄ in. Dia. (179.4 mm)

"B" "B"

Moisture/Explosion- Resistant

1 ½ in. NPT Hubs 1 ½ in. NPT Hubs

(3) 1 in. (25 mm) FIREBAR Elements (3) 1 in. (25 mm) FIREBAR Elements

Thermowell Thermowell

2 ½ in. (64 mm) Bundle 2 ½ in. (64 mm) Bundle

7 ⁄ in. Dia. (193.7 mm) 7 ⁄ in. Dia. (193.7 mm)

2.50" FIREBAR 2.50" FIREBAR

24 24

3 ⁄ in. (85.7 mm) Cold (Ref.) 3 ⁄ in. (85.7 mm) Cold (Ref.)

8 ⁄ in. Dia. (219.1 mm) 8 ⁄ in. Dia. (219.1 mm)

"B" "B"

Type 5A (60-250°F)

Type 7A (100-550°F)

WATCONNECT Part Number

WATCONNECT Part Number

“B” Dim. in. (mm)

Ship Wt. lbs (kg)

Part Number

Part Number

Description Volts kW Ph

Type J T/C

Type K T/C

Type J T/C

Type K T/C

General Purpose Enclosure

General Purpose Enclosure

240 1.25 3 15 1 / 8 (384.2) 11 (5) BLNF15C22S5A 240 1.63 3 18 1 / 8 (460.4) 13 (6) BLNF18C22S5A 240 2.13 3 23 1 / 8 (587.4) 15 (7) BLNF23C22S5A 480 2.13 3 23 1 / 8 (587.4) 15 (7) BLNF23C21S5A 240 2.63 3 28 5 / 8 (727.1) 18 (9) BLNF28L22S5A 480 2.63 3 28 5 / 8 (727.1) 18 (9) BLNF28L21S5A 240 3.19 3 33 5 / 8 (854.1) 19 (9) BLNF33L22S5A 480 3.19 3 33 5 / 8 (854.1) 19 (9) BLNF33L21S5A 240 4.25 3 44 1 / 8 (1120.8) 21 (10) BLNF44C22S5A 480 4.25 3 44 1 / 8 (1120.8) 21 (10) BLNF44C21S5A 240 5.38 3 54 5 / 8 (1387.5) 23 (11) BLNF54L22S5A 480 5.38 3 54 5 / 8 (1387.5) 23 (11) BLNF54L21S5A 240 1.25 3 15 1 / 8 (384.2) 14 (7) BLNF15C22C5A 240 1.63 3 18 1 / 8 (460.4) 16 (8) BLNF18C22C5A 240 2.13 3 23 1 / 8 (587.4) 18 (9) BLNF23C22C5A 480 2.13 3 23 1 / 8 (587.4) 18 (9) BLNF23C21C5A 240 2.63 3 28 5 / 8 (727.1) 21 (10) BLNF28L22C5A 480 2.63 3 28 5 / 8 (727.1) 21 (10) BLNF28L21C5A 240 3.19 3 33 5 / 8 (854.1) 22 (10) BLNF33L22C5A 480 3.19 3 33 5 / 8 (854.1) 22 (10) BLNF33L21C5A 240 4.25 3 44 1 / 8 (1120.8) 24 (11) BLNF44C22C5A 480 4.25 3 44 1 / 8 (1120.8) 24 (11) BLNF44C21C5A 240 5.38 3 54 5 / 8 (1387.5) 26 (11) BLNF54L22C5A 480 5.38 3 54 5 / 8 (1387.5) 26 (11) BLNF54L21C5A

8 W/in 2 3 304 SS Plug 3-Alloy 800 Elements (1.3 W/cm 2 )

C/F C/F BLNF15C22S7A C/F C/F BLNF18C22S7A C/F C/F BLNF23C22S7A C/F C/F BLNF23C21S7A C/F C/F BLNF28L22S7A C/F C/F BLNF28L21S7A C/F C/F BLNF33L22S7A C/F C/F BLNF33L21S7A C/F C/F BLNF44C22S7A C/F C/F BLNF44C21S7A C/F C/F BLNF54L22S7A C/F C/F BLNF54L21S7A C/F C/F BLNF15C22C7A C/F C/F BLNF18C22C7A C/F C/F BLNF23C22C7A C/F C/F BLNF23C21C7A C/F C/F BLNF28L22C7A C/F C/F BLNF28L21C7A C/F C/F BLNF33L22C7A C/F C/F BLNF33L21C7A C/F C/F BLNF44C22C7A C/F C/F BLNF44C21C7A C/F C/F BLNF54L22C7A C/F C/F BLNF54L21C7A Type K T/C

C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F C/F

Moisture/ Explosion-Resistant Enclosure 5

Moisture/ Explosion-Resistant Enclosure 5

Type J T/C

Type J T/C

Type K T/C

8 W/in 2 3 304 SS Plug 3-Alloy 800 Elements (1.3 W/cm 2 )

Note: All screw plug bundles are designed to fit the inside diameter of the equivalent mating coupling. They will not fit into the equivalent pipe inside diameter.

3 Wired for 3-phase operation only 5 No third party recognition C/F - Contact factory, go to www.watlow.com/en/contact-us

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