• Payment & Delivery

    Payment & Delivery
Immersion Heater Screw Plug | BLR717L3S
  • Immersion Heater Screw Plug | BLR717L3S
  • BLR717L3S Dimensions
  • BLR717L3S Drawing
  • Watlow BLR717L3S

BLR717L3C5A screw plug immersion heater

  • Comes wired 240v 3-phase delta in an explosion proof wiring enclosure
  • It has (3) 316-ss passivated 17.625-inch immersed length heating elements
  • with expoxy resin end seals rated at 194ºF and provide up to 7.5kw
  • Also included is an integral thermowell for a sensor (sensor not included)
  • and a 30A DPST thermostat control from 60ºF to 250ºF with a 12º differential
  • The heater has no heat the first 4.125-inches from the 2-1/2-inch NPT screw plug
  • and has an approximate shipping weight of 13/Lbs.
Tax included Ship 5-days after order entry
In Stock

  Security policy

(edit with the Customer Reassurance module)

  Delivery policy

(edit with the Customer Reassurance module)

  Return policy

(edit with the Customer Reassurance module)


2-1/2"NPT screw plug immersion heater | BLR717L3C5A

Applications for heating Deionized/Demineralized water include:

  • Steam boilers and cooling systems
  • Cleaning processes
  • Electronics manufacturing
  • Manufacturing cosmetics and personal care products
  • Medical and pharmaceutical manufacturing
  • Manufacturing lead-acid batteries
  • Car washes

Features & Benefits of the Watlow® immersion heater

The integral thermowell provides a convenient method for temperature sensor insertion and allowing a replacement without draining the fluid being heated. The CSA approved general purpose enclosure can be rotated to simplify connecting to existing conduits. The WATROD™ hairpin bend is re-compacted to maintain the mineral insulation density and maintain the dielectric strength and heat transfer efficiency. The heating elements have a bright annealing passivation for corrosion resistance and the screw plug is 316SS.

NOTE: A NEMA-7 enclosure designated for locations classified as Class-1, Division-1, Groups A,B,C, or D as defined in NFPA 70 is installed on this heater; however, is NOT CERTIFIED as installed on the heater. To obtain CSA certification as explosion proof Class-1, Groups B,C,D as installed on the heater, the end user must provide Watlow® the following intended process conditions: operating temperature, operating pressure, media type being heated, including the installation orientation of the heater (horizontal or vertical).

One conduit hub is supplied as per drawing.

Product Details
1 Item

Data sheet

CSA general purpose
not included
Line power
240v AC 3-phase delta
7500 watt
2-1/2" NPT screw plug
Immersion Length