Watlow Heater Catalog
Immersion Heaters
WATROD and FIREBAR Square Flange Immersion Heaters
Heater Dimension
in.
(mm)
1 / 4 in. (6 mm)
1 in. (25 mm) FIREBAR Element
(4) 13 / 32 in. dia. (10 mm)
C
1 1 / 2 2 1 / 2 2 1 / 2 1 3 / 4
A C D E H
(38) (64) (64) (44) (33)
H Bundle O.D.
1 5 / 16
A No-Heat Section B
D
E
Immersed Length
2 1 / 2 inch Square Flange—FIREBAR Element FIREBAR Immersed
Part Number
Est. Ship.
Description kW
B Dimension in. (mm)
208VAC 3-Phase
240VAC 1-Phase
240VAC 3-Phase
480VAC 1-Phase
480VAC 3-Phase
Wt.
lbs (kg)
Applications: Clean and Potable Water 100 W/in 2 5 11 1 / 2 (292) FHNFA11J26N
FHNFA11J10N FHNFA20N10N FHNFA24G10N
FHNFA11J3N FHNFA20N3N FHNFA24G3N FHNFA33S3N FHNFB22L3J
FHNFA11J11N FHNFA20N11N FHNFA24G11N FHNFA33S11N FHNFB22L11J
FHNFA11J5N FHNFA20N5N FHNFA24G5N FHNFA33S5N FHNFB22L5J
5 7 8 9
(3) (4) (4) (5) (5)
20 3 / 4 (527) FHNFA20N26N 24 3 / 8 (619) FHNFA24G26N 33 15 / 16 (862) FHNFA33S26N 22 5 / 8 (575) FHNFB22L26J
Steel Flange 1-Alloy 800 (15.5 W/cm 2 ) Steel Flange 1-Alloy 800 (12.4 W/cm 2 ) 80 W/in 2
8
10 15 16
FHNFB22L10J
10
(6) 3 / 8 in. dia. (10 mm) Holes Equally Spaced On a "C" dia. Bolt Circle
A No-Heat Section
Heater Dimension
in.
(25.0) (mm)
1 in. (25 mm) FIREBAR Element
A C D E H
1
3 13 / 16 (96.8)
H Bundle
4 1 / 2 2 1 / 4
(114.0)
(57.0) (81.8)
3 7 / 32
1 / 4 in. (6 mm)
B Immersed Length
D
E
4 1 / 2 inch Square Flange—FIREBAR Element FIREBAR Immersed
Part Number
Est. Ship.
Description kW
B Dimension in. (mm)
208VAC 3-Phase
240VAC 3-Phase
480VAC 3-Phase
Wt.
lbs (kg)
Applications: Clean and Potable Water 100 W/in 2 18 10 1 / 2 (267)
FGNFB10J26N
FGNFB10J3N
FGNFB10J5N
16
(8)
Steel Flange 2-Alloy 800 (15.5 W/cm 2 ) 70 W/in 2 Steel Flange 2-Alloy 800 (10.9 W/cm 2 )
10 1 / 2 (267)
FGNFB10J26P
FGNFB10J3P
FGNFB10J5P
12
16
(8)
288
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