Watlow’s flange heater without baffles

FNN7 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.

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Description

Watlow’s WATROD 5” FNN7 flange immersion heater is designed to provide uniform heating in process water, freeze protection, and viscosity control applications. The FNN7 is ANSI-compliant, compatible with Type J or Type K WATCONNECT thermocouples, and are available in either 240V or 408V configurations.

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  • Versatile Enclosure Options: The FNN7 can be designed with a General purpose or NEMA 4 enclosure for applications requiring moisture or explosion resistance.
  • Durable, Compact Design: Like all WATROD immersion heaters, the FNN7 is compact for easy installation, constructed from heavy-gauge steel, and features mgO insulation-filled elements.
  • Secure Installation: The FNN7 features welded-on mounting lugs and accessible terminal wiring to improve ease of installation and security.
  • Customizable: WATROD immersion heaters, including the FNN7, are fully customizable based on application requirements. 240V and 408V are available in 1- or 3-phase configurations. Other optional features include support saddles, high-temperature insulation, a passivated finish, and baffles.

Get turnkey support from Hi-Watt. Our experts can help you configure your heater, provide on-site installation assistance, and offer ongoing technical support and field repairs as needed to keep your processes running.

Flange Size 5″
Voltage 240V or 480V, 1 or 3-phase
# of Circuits Up to 3
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
Part Number/SKU Volts kW Ph # Circ “B” Dimension Shipping Weight Enclosure Type
FNN713J10S 240V 9 1 1 13.5″ 33 lbs General Purpose
FNN713J10W 240V 9 1 1 13.5″ 33 lbs NEMA 4
FNN713J3S 240V 9 3 1 13.5″ 33 lbs General Purpose
FNN713J3W 240V 9 3 1 13.5″ 33 lbs NEMA 4
FNN713J11S 480V 9 1 1 13.5″ 33 lbs General Purpose
FNN713J11W 480V 9 1 1 13.5″ 33 lbs NEMA 4
FNN713J5S 480V 9 3 1 13.5″ 33 lbs General Purpose
FNN713J5W 480V 9 3 1 13.5″ 33 lbs NEMA 4
FNN718A10S 240V 12 1 2 18″ 36 lbs General Purpose
FNN718A10W 240V 12 1 2 18″ 36 lbs NEMA 4
FNN718A3S 240V 12 3 1 18″ 36 lbs General Purpose
FNN718A3W 240V 12 3 1 18″ 36″ NEMA 4
FNN718A11S 480V 12 1 1 18″ 36″ General Purpose
FNN718A11W 480V 12 1 1 18″ 36 lbs NEMA 4
FNN718A5S 480V 12 3 1 18″ 36 lbs General Purpose
FNN718A5W 480V 12 3 1 18″ 36 lbs NEMA 4
FNN720J10S 240V 15 1 2 20.5″ 38 lbs General Purpose
FNN720J10W 240V 15 1 2 20.5″ 38 lbs NEMA 4
FNN720J3S 240V 15 3 1 20.5″ 38 lbs General Purpose
FNN720J3W 240V 15 3 1 20.5″ 38 lbs NEMA 4
FNN720J11S 480V 15 1 1 20.5″ 38 lbs General Purpose
FNN720J11W 480V 15 1 1 20.5″ 38 lbs NEMA 4
FNN720J5S 480V 15 3 1 20.5″ 38 lbs General Purpose
FNN720J5W 480V 15 3 1 20.5″ 38 lbs NEMA 4
FNN725J10S 240V 18 1 2 25.5″ 40 lbs General Purpose
FNN725J10W 240V 18 1 2 25.5″ 40 lbs NEMA 4
FNN725J3S 240V 18 3 1 25.5″ 40 lbs General Purpose
FNN725J3W 240V 18 3 1 25.5″ 40 lbs NEMA 4
FNN725J11S 480V 18 1 1 25.5″ 40 lbs General Purpose
FNN725J11W 480V 18 1 1 25.5″ 40 lbs NEMA 4
FNN725J5S 480V 18 3 1 25.5″ 40 lbs General Purpose
FNN725J5W 480V 18 3 1 25.5″ 40 lbs NEMA 4
FNN733A10S 240V 24 1 3 33″ 43 lbs General Purpose
FNN733A10W 240V 24 1 3 33″ 43 lbs NEMA 4
FNN733A3S 240V 24 3 2 33″ 43 lbs General Purpose
FNN733A3W 240V 24 3 2 33″ 43 lbs NEMA 4
FNN733A11S 480V 24 1 1 33″ 43 lbs General Purpose
FNN733A11W 480V 24 1 1 33″ 43 lbs NEMA 4
FNN733A5S 480V 24 3 1 33″ 43 lbs General Purpose
FNN733A5W 480V 24 3 1 33″ 43 lbs NEMA 4
FNN740J3S 240V 30 3 2 40.5″ 47 lbs General Purpose
FNN740J3W 240V 30 3 2 40.5″ 47 lbs NEMA 4
FNN740J11S 480V 30 1 2 40.5″ 47 lbs General Purpose
FNN740J11W 480V 30 1 2 40.5″ 47 lbs NEMA 4
FNN740J5S 480V 30 3 1 40.5″ 47 lbs General Purpose
FNN740J5W 480V 30 3 1 40.5″ 47 lbs NEMA 4
FNN748A3S 240V 36 3 2 48″ 52 lbs General Purpose
FNN748A3W 240V 36 3 2 48″ 52 lbs NEMA 4
FNN748A11S 480V 36 1 2 48″ 52 lbs General Purpose
FNN748A11W 480V 36 1 2 48″ 52 lbs NEMA 4
FNN748A5S 480V 36 3 1 48″ 52 lbs General Purpose
FNN748A5W 480V 36 3 1 48″ 52 lbs NEMA 4
FNN713J10XS 240V 14 1 3 13.5″ 35 lbs General Purpose
FNN713J10XW 240V 14 1 3 13.5″ 35 lbs NEMA 4
FNN713J3XS 240V 14 3 1 13.5″ 35 lbs General Purpose
FNN713J3XW 240V 14 3 1 13.5″ 35 lbs NEMA 4
FNN713J11XS 480V 14 1 1 13.5″ 35 lbs General Purpose
FNN713J11XW 480V 14 1 1 13.5″ 35 lbs NEMA 4
FNN713J5XS 480V 14 3 1 13.5″ 35 lbs General Purpose
FNN713J5XW 480V 14 3 1 13.5″ 35 lbs NEMA 4
FNN718A10XS 240V 18 1 3 18″ 39 lbs General Purpose
FNN718A10XW 240V 18 1 3 18″ 39 lbs NEMA 4
FNN718A3XS 240V 18 3 1 18″ 39 lbs General Purpose
FNN718A3XW 240V 18 3 1 18″ 39 lbs NEMA 4
FNN718A11XS 480V 18 1 1 18″ 39 lbs General Purpose
FNN718A11XW 480V 18 1 1 18″ 39 lbs NEMA 4
FNN718A5XS 480V 18 3 1 18″ 39 lbs General Purpose
FNN718A5XW 480V 18 3 1 18″ 39 lbs NEMA 4
FNN720J10XS 240V 23 1 3 20.5″ 42 lbs General Purpose
FNN720J10XW 240V 23 1 3 20.5″ 42 lbs NEMA 4
FNN720J3XS 240V 23 3 3 20.5″ 42 lbs General Purpose
FNN720J3XW 240V 23 3 3 20.5″ 42 lbs NEMA 4
FNN720J11XS 480V 23 1 1 20.5″ 42 lbs General Purpose
FNN720J11XW 480V 23 1 1 20.5″ 42 lbs NEMA 4
FNN725J10XS 240V 27 1 3 25.5″ 45 lbs General Purpose
FNN725J10XW 240V 27 1 3 25.5″ 45 lbs NEMA 4
FNN725J3XS 240V 27 3 3 25.5″ 45 lbs Genera Purpose
FNN725J3XW 240V 27 3 3 25.5″ 45 lbs NEMA 4
FNN725J11XS 480V 27 1 3 25.5″ 45 lbs General Purpose
FNN725J11XW 480V 27 1 3 25.5″ 45 lbs NEMA 4
FNN725J5XS 480V 27 3 1 25.5″ 45 lbs General Purpose
FNN725J5XW 480V 27 3 1 25.5″ 45 lbs NEMA 4
FNN733A3XS 240V 36 3 3 33″ 48 lbs General Purpose
FNN733A3XW 240V 36 3 3 33″ 48 lbs NEMA 4
FNN733A11XS 480V 36 1 3 33″ 48 lbs General Purpose
FNN733A11XW 480V 36 1 3 33″ 48 lbs NEMA 4
FNN733A5XS 480V 36 3 1 33″ 48 lbs General Purpose
FNN733A5XW 480V 36 3 1 33″ 48 lbs NEMA 4
FNN740J3XS 240V 45 3 3 40.5″ 53 lbs General Purpose
FNN740J3XW 240V 45 3 3 40.5″ 53 lbs NEMA 4
FNN740J11XS 480V 45 1 3 40.5″ 53 lbs General Purpose
FNN740J11XW 480V 45 1 3 40.5″ 53 lbs NEMA 4
FNN740J5XS 480V 45 3 3 40.5″ 53 lbs General Purpose
FNN740J5XW 480V 45 3 3 40.5″ 53 lbs NEMA 4
FNN748A3XS 240V 54 3 3 48″ 60 lbs General Purpose
FNN748A3XW 240V 54 3 3 48″ 60 lbs NEMA 4
FNN748A11XS 480V 54 1 3 48″ 60 lbs General Purpose
FNN748A11XW 480V 54 1 3 48″ 60 lbs NEMA 4
FNN748A5XS 480V 54 3 3 48″ 60 lbs General Purpose
FNN748A5XW 480V 54 3 3 48″ 60 lbs NEMA 4

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