Electric Heating Co., Inc

Insulation Density

Compaction of Magnesium Oxide (MgO), the insulation material that isolates the
coil in our heaters provides several benefits that translate to superior performance for
our customers.  Compaction of MgO provides two enhancements to a cartridge heater:
it increases the dielectric (insulation value) and the ability to transfer heat from the
coil to the sheath.  To begin, our filling process allows the MgO access to the outside
and inside of the coil, providing very consistent application of the insulation material.

The swaging process compacts the insulation through diameter reduction.  The
secret to effective swaging is die design.  At Dalton Electric, we have a number of very
talented manual machinists with more years of experience than they would care to
admit.  This gives us complete process control of feathering the taper of the die and
designing it to perfectly swage a heater for optimum compaction.

Since we do not have a ceramic core as found in a conventional cartridge heater, we
can swage much denser.  This increased insulation will keep the current in the coil
where it belongs.  All MgO's ability to provide insulation value is decreased under
extreme heat, but our increased compaction provides long life, even in situations of
very high heat at up to 600 volts.

Friday Funnies

More Actual Doctor's Stories

1. One day I had to be the bearer of bad news when I told a wife that her husband had died of a massive myocardial infarct. Not more than five minutes later, I heard her reporting to the rest of the family that he had died of a "massive internal fart."

Submitted by Dr. Susan Steinberg

2. During a patient's two week follow-up appointment with his cardiologist, he informed me, his doctor, that he was having trouble with one of his medications.

"Which one?" I asked.

"The patch, the nurse told me to put on a new one every six hours, and now I'm running out of places to put it!"

I had him quickly undress, and discovered what I hoped I wouldn't see. Yes, the man had over fifty patches on his body! Now, the instructions include removal of the old patch before applying a new one.

Submitted by Dr. Rebecca St. Clair, Norfolk, VA.

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

(C) Copyright 2006 - 2008. Dalton Electric Heating Co, Inc. All Rights Reserved.