Electric Heating Co., Inc

Cold Terminal End

Cold in concert with heat ... often a necessary thing. The standard or minimum cold section is fixed and available in the Watt-Flex® cartridge heater brochure. But often an application will require a longer cold section at the terminal end. It may be to get the wire and terminals away from intense heat or to extend through insulation. We are currently involved with huge platens at 1800°F (+) ... our heater extends through 4" of insulation, bends at a right angle and extends down for a foot to get the transition and leads away from that intense heat.

Heated section outside of the heat sink can be dangerous. If the heater cannot move its heat away from the sheath, two things will happen: 1) the NiCr resistance wire will begin to work harden and the chromium will diffuse out of the wire and 2) the ability of the MgO insulation to serve as a dielectric will degrade with the excess heat.

A heater sticking out of the bore must factor in length tolerance of the heater and the required distance outside of the bore. It is necessary to design sufficient cold length to insure that the heated section is fully in the bore. A quick consultation with the Dalton office or your Regional Manager is always available to you.

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Dalton Electric Heating Co., Inc (978)356-9844
28 Hayward Street Ipswich, MA 01938 USA

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