Watlow WATROD FRN7 Flange Immersion Heater

Starting at: $800.00

Call 800-321-8007 or fill out our online form today to order this product or to speak with a Hi-Watt application specialist.

Description

Designed for heavier-duty heating applications, FRN7 features an 8” flange and up to 24 Alloy 800 heating elements. Like all WATROD immersion heaters, the FRN7 excels in process water, freeze protection, and viscosity control applications, and is designed for use in hazardous locations.

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  • Tailored to Application Requirements: The FRN7 can be customized for 240 or 480V, 1- or 3-phase configurations, and features up to 8 circuits and up to 24 heating elements.
  • Durable: The WATROD immersion heaters are built to last. The FRN7 is designed with heavy-gauge steel, MgO-insulated elements, and robust sheathing.
  • Easy to Install: This immersion heater has welded-on mounting lugs and accessible terminal wiring for easy and secure installations into pressure vessels and tanks.

Get help from Hi-Watt application specialists. Our team can help you find the right heating solution, offer integration assistance, and ensure optimal performance through ongoing technical support, field repairs, and ISO 17025-compliant calibrations.

Flange Size 8″
Voltage 240 or 480V
# of Circuits Up to 8
Watt Density 48 W/in2 (Standard)
Wattages Up to 3 MW
Pressure Rating Class 150
Maximum Temperature 1,600°F (870°C)
NPT Screw Plugs Available in 1 1/4″ or 2 1/2″
Sheath Material Alloy 800
Thermocouples Type J or K
Heating Elements 18 or 24
Part Number/SKU Volts kW Ph # Circ “B” Dimension Weight Enclosure Type
FRN725N3S 240 50 3 3 25.75″ 121 lbs General Purpose
FRN725N3W 240 50 3 3 25.75″ 121 lbs NEMA 4
FRN725N11S 480 50 1 3 25.75″ 121 lbs General Purpose
FRN725N11W 480 50 1 3 25.75″ 121 lbs NEMA 4
FRN725N5S 480 50 3 2 25.75″ 121 lbs General Purpose
FRN725N5W 480 50 3 2 25.75″ 121 lbs NEMA 4
FRN735N3S 240 75 3 6 35.75″ 130 lbs General Purpose
FRN735N3W 240 75 3 6 35.75″ 130 lbs NEMA 4
FRN735N5S 480 75 3 2 35.75″ 130 lbs General Purpose
FRN735N5W 480 75 3 2 35.75″ 130 lbs NEMA 4
FRN744E3S 240 100 3 6 44.25″ 132 lbs General Purpose
FRN744E3W 240 100 3 6 44.25″ 132 lbs NEMA 4
FRN744E5S 480 100 3 3 44.25″ 132 lbs General Purpose
FRN744E5W 480 100 3 3 44.25″ 132 lbs NEMA 4
FRN754M3S 240 125 3 6 54.6875″ 140 lbs General Purpose
FRN754M3W 240 125 3 6 54.6875″ 140 lbs NEMA 4
FRN754M5S 480 125 3 6 54.6875″ 140 lbs General Purpose
FRN754M5W 480 125 3 6 54.6875″ 140 lbs NEMA 4
FRN763M5S 480 150 3 6 63.6875″ 145 lbs General Purpose
FRN763M5W 480 150 3 6 63.6875″ 145 lbs NEMA 4
FRN773D5S 480 175 3 6 73.1875″ 151 lbs General Purpose
FRN773D5W 480 175 3 6 73.1875″ 151 lbs NEMA 4
FRN782M5S 480 200 3 6 82.6875″ 157 lbs General Purpose
FRN782M5W 480 200 3 6 82.6875″ 157 lbs NEMA 4
FRN726D3XS 240 67 3 4 26.1875″ 129 lbs General Purpose
FRN726D3XW 240 67 3 4 26.1875″ 129 lbs NEMA 4
FRN726D11XS 480 67 1 3 26.1875″ 129 lbs General Purpose
FRN726D11XW 480 67 1 3 26.1875″ 129 lbs NEMA 4
FRN726D5XS 480 67 3 2 26.1875″ 129 lbs General Purpose
FRN726D5XW 480 67 3 2 26.1875″ 129 lbs NEMA 4
FRN736D3XS 240 100 3 8 36.1876″ 142 lbs General Purpose
FRN736D3XW 240 100 3 8 36.1875″ 142 lbs NEMA 4
FRN736D5XS 480 100 3 4 36.1875″ 142 lbs General Purpose
FRN736D5XW 480 100 3 4 36.1875″ 142 lbs NEMA 4
FRN744M3XS 240 133 3 8 44.6875″ 147 lbs General Purpose
FRN744M3XW 240 133 3 8 44.6875″ 147 lbs NEMA 4
FRN744M5XS 480 133 3 4 44.6875″ 147 lbs General Purpose
FRN744M5XW 480 133 3 4 44.6875″ 147 lbs NEMA 4
FRN754M3XS 240 167 3 8 54.6875″ 158 lbs General Purpose
FRN754M3XW 240 167 3 8 54.6875″ 158 lbs NEMA 4
FRN754M5XS 480 167 3 8 54.6875″ 158 lbs General Purpose
FRN754M5XW 480 167 3 8 54.6875″ 158 lbs NEMA 4
FRN763M5XS 480 200 3 8 63.6875″ 166 lbs General Purpose
FRN763M5XW 480 200 3 8 63.6875″ 166 lbs NEMA 4
FRN773D5XS 480 233 3 8 73.1875″ 175 lbs General Purpose
FRN773D5XW 480 233 3 8 73.1875″ 175 lbs NEMA 4
FRN782M5XS 480 267 3 8 82.6875″ 184 lbs General Purpose
FRN782M5XW 480 267 3 8 82.6875″ 184 lbs NEMA 4