Non-Swaged Cartridge Heaters

• RTV Potting, when used in combination with silicone rubber insulated lead wire, provides the best seal of all options.
• The down side to silicone is that it is limited to 500ºF and while extremely flexible, it is not as strong mechanically as other options.
• Although the RTV is rated for 500ºF, silicone rubber leads are only rated to 392ºF. An option is to use Duraflex lead wire instead. Duraflex is rated to 1000ºF and has a heavy silicone coating.
• While Duraflex is not sold as a waterproof wire, it performs very well in wet environments.
• Another option is to use crimped on leads, then the power pins are sealed where they enter the heater and the type of lead wire does not matter.

• Standard flange material is stainless steel.
• Flanges can be welded on the lead end of the heater.
• Flanges can be used to hold a heater in place to prevent backing out during operation.
• Flanges also assist in heater removal. 
• Flanges can be round or irregularly shaped and are 1/16" thick. 
• Custom round or rectangular flanges available.
• Contact Backer Marathon for standard and non-standard flange configurations at sales@backermarathon.com.

Mechanical Stops are ideal for preventing heaters from sliding too far into the hole. Backer Marathon offers the following mechanical stops:

• Weld Beads
• Tab Stops 
• Locating Rings

• Straight Threads
• Brass Cubes
• Stainless Steel Cubes
• Others to Your Specifications