Electric Heating Co., Inc

Insulation Density (cont.)

Last week we discussed compaction of the MgO insulation in a Watt-Flex® cartridge
heater and how that provided better di-electric value between the coil and sheath of the heater.  But there is another benefit to the increased compaction of our split heater.

MgO is used as the insulation because it provides two characteristics: insulation and
heat transfer.  Compaction increases both of these properties.  The cartridge is filled
with the MgO in a crystalline form (nearly powder) and achieves a tight density through
vibration of the heater.  When the heater is swaged, this tightly packed Mgo becomes
more like a ceramic in form.

This increased heat transfer is key to the life of the heater, as a coil that runs cooler at
a given set point temperature will last longer.  And this feature works in concert with the superior contact of the split sheath with the walls of the bore.  The heat moves more efficiently to the sheath of the heater and then into the bore and heat sink, markedly increasing the life of the heater.  Watt-Flex is your key to reduced cost of heating !!!

Friday Funnies

More Actual Doctor's Stories

While acquainting myself with a new elderly patient, I asked,   How long have you been bedridden?" After a look of complete confusion, she answered ... "Why, not for about
twenty years -- when my husband was alive."

Submitted by Dr. Steven Swanson, Corvallis, OR

As a new, young MD doing his residency in OB, I was quite embarrassed when performing female pelvic exams. To cover my embarrassment, I had unconsciously formed a habit of whistling softly. The middle-aged lady upon whom I was performing this exam suddenly burst out laughing, further embarrassing me. I looked up from my work and sheepishly said, "I'm sorry.  Was I tickling you?"
She replied, "No doctor, but the song you were whistling was, "I wish I was an Oscar Meyer Wiener.."

Doctor wouldn't submit his name (Can't blame him!)

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

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