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Watlow 2-1/2" NPT Firebar Screw Plug Heater Ordering - Code Prefix BLNF
To order, complete the form below by selecting the options desired in each category. Then click the "submit" button.
The part number and price will be displayed on the next page.
1. Select Base Screw Plug Heater

Code No. Style Volts kW Immersed
Length "B"		 Price
Applications: Clean and Potable Water
BLNF15C3 2-1/2" NPT
90 W/In²
304SS Plug,
3-Incoloy
Firebar
Elements		 240 3-ph 15.0 15-1/8" $953.00
BLNF15C5 480 3-ph 15.0 15-1/8" $953.00
BLNF18C3 240 3-ph 20.0 18-1/8" $1076.00
BLNF18C5 480 3-ph 20.0 18-1/8" $1076.00
BLNF23C5 480 3-ph 25.0 23-1/8" $1281.00
BLNF28L5 480 3-ph 32.0 28-5/8" $1506.00
BLNF33L5 480 3-ph 38.0 33-5/8" $1684.00
Applications: Process Water, Ethylene Glycol (50%)
BLNF12A27 2-1/2" NPT
45 W/In²
304SS Plug,
3-Incoloy
Firebar
Elements		 240 3-ph 6.0 12" $757.00
BLNF14J27 240 3-ph 7.5 14-1/2" $915.00
BLNF17A27 240 3-ph 9.0 17" $1012.00
BLNF21J27 240 3-ph 12.0 21-1/2" $1190.00
BLNF21J28 480 3-ph 12.0 21-1/2" $1190.00
BLNF26J27 240 3-ph 15.0 26-1/2" $1394.00
BLNF26J28 480 3-ph 15.0 26-1/2" $1394.00
BLNF31J27 240 3-ph 18.0 31-1/2" $1574.00
BLNF31J28 480 3-ph 18.0 31-1/2" $1574.00
BLNF41A28 480 3-ph 24.0 41" $1733.00
BLNF50J28 480 3-ph 30.0 50-1/2" $1927.00
Applications: Cooking Oils, Ethylene Glycol (100%)
BLNF15C12 2-1/2" NPT
30 W/In²
304SS Plug,
3-Incoloy
Firebar
Elements		 240 3-ph 5.0 15-1/8" $953.00
BLNF15C13 480 3-ph 5.0 15-1/8" $953.00
BLNF18C12 240 3-ph 6.5 18-1/8" $1076.00
BLNF18C13 480 3-ph 6.5 18-1/8" $1076.00
BLNF23C12 240 3-ph 8.5 23-1/8" $1281.00
BLNF23C13 480 3-ph 8.5 23-1/8" $1281.00
BLNF28L12 240 3-ph 10.5 28-5/8" $1506.00
BLNF28L13 480 3-ph 10.5 28-5/8" $1506.00
BLNF33L12 240 3-ph 12.8 33-5/8" $1684.00
BLNF33L13 480 3-ph 12.8 33-5/8" $1684.00
BLNF44C12 240 3-ph 17 44-1/8" $1855.00
BLNF44C13 480 3-ph 17 44-1/8" $1855.00
BLNF54L13 480 3-ph 21.5 54-5/8" $2030.00
Applications: Heat Transfer Oils, Mineral Oils, Degreasing Solutions
BLNF15C20 2-1/2" NPT
23 W/In²
304SS Plug,
3-Incoloy
Firebar
Elements		 240 3-ph 3.8 15-1/8" $953.00
BLNF18C20 240 3-ph 4.9 18-1/8" $1076.00
BLNF23C20 240 3-ph 6.4 23-1/8" $1281.00
BLNF23C19 480 3-ph 6.4 23-1/8" $1281.00
BLNF28L20 240 3-ph 7.9 28-5/8" $1506.00
BLNF28L19 480 3-ph 7.9 28-5/8" $1506.00
BLNF33L20 240 3-ph 9.6 33-5/8" $1684.00
BLNF33L19 480 3-ph 9.6 33-5/8" $1684.00
BLNF44C20 240 3-ph 12.8 44-1/8" $1855.00
BLNF44C19 480 3-ph 12.8 44-1/8" $1855.00
BLNF54L20 240 3-ph 16.1 54-5/8" $2030.00
BLNF54L19 480 3-ph 16.1 54-5/8" $2030.00
Applications: Medium Weight Oils, Heat Transfer Oils, Lubrication Oils, Liquid Paraffin
BLNF12A29 2-1/2" NPT
15 W/In²
304SS Plug,
3-Incoloy
Firebar
Elements		 240 3-ph 2.0 12" $757.00
BLNF14J29 240 3-ph 2.5 14-1/2" $915.00
BLNF17A29 240 3-ph 3.0 17" $1012.00
BLNF21J29 240 3-ph 4.0 21-1/2" $1190.00
BLNF21J30 480 3-ph 4.0 21-1/2" $1190.00
BLNF26J29 240 3-ph 5.0 26-1/2" $1394.00
BLNF26J30 480 3-ph 5.0 26-1/2" $1394.00
BLNF31J29 240 3-ph 6.0 31-1/2" $1574.00
BLNF31J30 480 3-ph 6.0 31-1/2" $1574.00
BLNF41A29 240 3-ph 8.0 41" $1733.00
BLNF41A30 480 3-ph 8.0 41" $1733.00
BLNF50J29 240 3-ph 10.0 50-1/2" $1927.00
BLNF50J30 480 3-ph 10.0 50-1/2" $1927.00
Applications: Bunker C and #6 Fuel Oils, Asphalt
BLNF15C22 2-1/2" NPT
8 W/In²
304SS Plug,
3-Incoloy
Firebar
Elements		 240 3-ph 1.25 15-1/8" $953.00
BLNF18C22 240 3-ph 1.63 18-1/8" $1076.00
BLNF23C22 240 3-ph 2.13 23-1/8" $1281.00
BLNF23C21 480 3-ph 2.13 23-1/8" $1281.00
BLNF28L22 240 3-ph 2.63 28-5/8" $1506.00
BLNF28L21 480 3-ph 2.63 28-5/8" $1506.00
BLNF33L22 240 3-ph 3.19 33-5/8" $1684.00
BLNF33L21 480 3-ph 3.19 33-5/8" $1684.00
BLNF44C22 240 3-ph 4.25 44-1/8" $1855.00
BLNF44C21 480 3-ph 4.25 44-1/8" $1855.00
BLNF54L22 240 3-ph 5.38 54-5/8" $2030.00
BLNF54L21 480 3-ph 5.38 54-5/8" $2030.00

2. Select Terminal Enclosure Type (price shown is for enclosure only option)
 Price
S = General Purpose Enclosure (NEMA 1)
 N/A
W = Moisture Resistant Enclosure (NEMA 4)
 $172.00
E = Explosion Resistant Enclosure (NEMA 7)
 $172.00
C = Explosion/Moisture Resistant Enclosure (NEMA 7/4)
 $191.00

3. Process Thermocouple / Thermostat Option
 Price "S"
Enclosure		 Price "W"
Enclosure		 Price "E"
Enclosure		 Price "C"
Enclsoure
None
N/A N/A N/A N/A
J = Type J Process Thermcouple
 $187.00 $359.00 $359.00 $378.00
K = Type K Process Thermocouple
 $187.00 $359.00 $359.00 $378.00
1 = #1 SPST Tstat, 30-110°F
 $270.00 $400.00 $620.00 $660.00
2 = #2 SPST Tstat, 30-250°F
 $270.00 $400.00 $620.00 $660.00
3 = #3 SPST Tstat, 175-550°F
 $270.00 $400.00 $620.00 $660.00
5A = #5A DPST Tstat, 60-250°F
 $319.00 $531.00 $721.00 $766.00
7A = #7A DPST Tstat, 100-550°F
 $319.00 $531.00 $721.00 $766.00
8 = #8 DPST Hi-Limit Tstat, 60-250°F
 $623.00 $834.00 $1026.00 $1085.00
9 = #9 DPST Hi-Limit Tstat, 100-550°F
 $623.00 $834.00 $1026.00 $1085.00
11 = #11 SPST Hi-Limit Tstat, 350°F
 $270.00 $400.00 $620.00 $660.00
12A = #12A SPST Tstat, 60-160°F
 $270.00 $400.00 $620.00 $660.00

4. Over-Temperature Thermocouple Option
 Price "S"
Enclosure		 Price "W"
Enclosure		 Price "E"
Enclosure		 Price "C"
Enclsoure
None
N/A N/A N/A N/A
JH = Type J Over-Temp Thermcouple - Horizontal mounting
 $243.00 $243.00 $243.00 $243.00
JU = Type J Over-Temp Thermcouple - Vertical Up mounting
 $243.00 $243.00 $243.00 $243.00
JD = Type J Over-Temp Thermcouple - Vertical Down mounting
 $243.00 $243.00 $243.00 $243.00
KH = Type K Over-Temp Thermcouple - Horizontal mounting
 $243.00 $243.00 $243.00 $243.00
KU = Type K Over-Temp Thermcouple - Vertical Up mounting
 $243.00 $243.00 $243.00 $243.00
KD = Type K Over-Temp Thermcouple - Vertical Down mounting
 $243.00 $243.00 $243.00 $243.00


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